DO - NOT 44DO NOT aloe vera

DO - NOT 44DO NOT aloe vera

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44 WOUNDS www.woundsresearch.com S kin grafting is a reconstructive procedure in plastic surgery designed to accelerate the healing of wounds, such as burns and trauma wounds. The donor sites created after harvesting a split-thickness skin graft present an additional wound to manage.The management of the donor site after removing the skin graft is an important patient comfort issue.A suitable wound dressing helps to achieve wound healing and to satisfy patients barring any complications, such as infection or pain. A suitable dressing should also facilitate physiological recovery.1,2 There are two dressing strategies for wound healing after skin grafting: dressing with high humidity at the wound harvesting surface (moist dressing) and non-moist dressing (dry dressing).2–4 Dressing material that adheres to the wound causes bleeding, and removing the dressing is often painful.A moist dressing has a The Effects of Aloe Vera Cream on Split-thickness Skin Graft Donor Site Management: A Randomized, Blinded, Placebo-controlled Study Ghasemali Khorasani, MD;1 Ali Ahmadi, MD;1,2 Seyed Jalal Hosseinimehr, PhD;3 Amirhossein Ahmadi, PharmD;4 Ahmadreza Taheri, MD;1 Hamidreza Fathi, MD1 WOUNDS 2011;23(2):44–48 From the 1 Department of Surgery, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran; 2 Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran; 3 Department of Radiopharmacy, Faculty of Pharmacy, Traditional and Complementary Medicine Research Center, Mazandaran University of Medical Sciences, Sari, Iran; 4 Research Student Committee, Mazandaran University of Medical Sciences, Sari, Iran Address correspondence to: Ghasemali Khorasani, MD Imam Khomeini Hospital Keshasvarz Boulevard Tehran, Iran Phone: +98 21 66418885 E-mail: khorasani@tums.ac.ir Abstract: Purpose. Split-thickness skin graft donor site management is an important patient comfort issue. The present study examined the effects of aloe vera cream compared to placebo cream and gauze dressing on the rates of wound healing and infection at the donor site. Methods. Forty-five patients were enrolled in this randomized clinical trial and divided into three groups: control (without topical agent), placebo (base cream without aloe vera), and aloe vera cream groups. All patients underwent split-thickness skin grafting for various reasons, and the skin graft donor site wounds were covered with sin- gle-layer gauze without any topical agent, with aloe vera, or with place- bo cream. The donor sites were assessed daily postoperatively until complete healing was achieved. Results. Mean time to complete re-epithelization was 17 ± 8.6, 9.7 ± 2.9, and 8.8 ± 2.8 days for control, aloe vera, and placebo groups, respectively. Mean wound healing time in the control group was significantly different from the aloe vera and placebo groups (P < 0.005). The healing rate was not statistically different between aloe vera and placebo groups. Conclusion. This study showed a significantly shorter wound care time for skin graft donor sites in patients who were treated with aloe vera and placebo creams. The moist maintenance effect of these creams may contribute to wound healing.

ORIGINAL RESEARCH O O 44 O 44 WOUNDS O WOUNDS O N O T N O T N O T Mazandaran University of Medical N O T Mazandaran University of Medical Address correspondence to: N O T Address correspondence to: Ghasemali Khorasani, MD N O T Ghasemali Khorasani, MD Imam Khomeini Hospital N O T Imam Khomeini Hospital Keshasvarz Boulevard N O T Keshasvarz Boulevard Phone: +98 21 66418885 N O T Phone: +98 21 66418885 E-mail: khorasani@tums.ac.ir N O T E-mail: khorasani@tums.ac.ir healing time in the control group was significantly different from the N O T healing time in the control group was significantly different from the aloe vera N O T aloe vera statistically different between N O T statistically different between Conclusion.

N O T Conclusion. for skin graft donor sites in patients who were treated with N O T for skin graft donor sites in patients who were treated with and placebo creams. The moist maintenance effect of these creams N O T and placebo creams. The moist maintenance effect of these creams D U P L I C A T E D U P L I C A T E D U P L I C A T E Cream on D U P L I C A T E Cream on Split-thickness Skin Graft Donor Site D U P L I C A T E Split-thickness Skin Graft Donor Site Management: A Randomized, D U P L I C A T E Management: A Randomized, Blinded, Placebo-controlled Study D U P L I C A T E Blinded, Placebo-controlled Study Ghasemali Khorasani, MD; D U P L I C A T E Ghasemali Khorasani, MD; Ali Ahmadi, MD; D U P L I C A T E Ali Ahmadi, MD; Amirhossein Ahmadi, PharmD; D U P L I C A T E Amirhossein Ahmadi, PharmD; Ahmadreza Taheri, MD; D U P L I C A T E Ahmadreza Taheri, MD;1 D U P L I C A T E 1 Hamidreza Fathi, MD D U P L I C A T E Hamidreza Fathi, MD . Split-thickness skin graft donor site management is D U P L I C A T E . Split-thickness skin graft donor site management is an important patient comfort issue. The present study examined the D U P L I C A T E an important patient comfort issue. The present study examined the aloe vera D U P L I C A T E aloe vera cream compared to placebo cream and gauze D U P L I C A T E cream compared to placebo cream and gauze dressing on the rates of wound healing and infection at the donor site. D U P L I C A T E dressing on the rates of wound healing and infection at the donor site. Forty-five patients were enrolled in this randomized clinical D U P L I C A T E Forty-five patients were enrolled in this randomized clinical trial and divided into three groups: control (without topical agent), D U P L I C A T E trial and divided into three groups: control (without topical agent), placebo (base cream without D U P L I C A T E placebo (base cream without D U P L I C A T E All patients underwent split-thickness skin grafting for various D U P L I C A T E All patients underwent split-thickness skin grafting for various reasons, and the skin graft donor site wounds were covered with sin- D U P L I C A T E reasons, and the skin graft donor site wounds were covered with sin- gle-layer gauze without any topical agent, with D U P L I C A T E gle-layer gauze without any topical agent, with bo cream. The donor sites were assessed daily postoperatively until D U P L I C A T E bo cream. The donor sites were assessed daily postoperatively until complete healing was achieved.

D U P L I C A T E complete healing was achieved. re-epithelization was 17 ± 8.6, 9.7 ± 2.9, and 8.8 ± 2.8 days for D U P L I C A T E re-epithelization was 17 ± 8.6, 9.7 ± 2.9, and 8.8 ± 2.8 days for control, D U P L I C A T E control, aloe vera D U P L I C A T E aloe vera healing time in the control group was significantly different from the D U P L I C A T E healing time in the control group was significantly different from the D U P L I C A T E

DO - NOT 44DO NOT aloe vera

Vol. 23, No. 2 February 2011 45 greater effect on wound healing and pain relief than a dry dressing.5 Various types of dressing materials have been recognized based on ease of use,cost,optimal heal- ing environment,and pain relief, eg, paraffin gauze dress- ing,6 hemicelluose dressing (Veloderm® , BTC srl,Torino, Italy),1 lipido-colloid wound dressing (Urgotul® , Laboratoires Urgo,Chenôve,France),7 polyurethane film,8 carboxymethyl cellulose dressing (Aquacel® , ConvaTec, Skillman, NJ),9 ionic-containing hydrofiber dressing,10 alginate (Kaltostat® , ConvaTec),3 and polyvinyl pyrroli- done-iodine liposome hydrogel.11 These dressing materi- als induce moisture on the wound surface by absorbing and maintaining water. In 2009,Voineskos et al4 conduct- ed a comprehensive systematic review of skin graft donor site dressings.They concluded that the evidence supporting moist wound dressings is weak, and more methodologically sound, randomized, controlled trials are needed to determine the optimal dressing for split- thickness skin graft donor sites.Trials with parallel evalu- ations are necessary to answer this question.4 Although numerous dressings have been studied, there is not one perfect dressing for use on the donor site that is easy to use, provides patient comfort, prevents infection, is inex- pensive, and promotes faster re-epithelization. Aloe vera (family: Liliaceae) has been used in tradi- tional medicine for a long time. Aloe vera gel, which is obtained by breaking or slicing its leaf, is the principle part of the plant that is used in herbal medicine. Aloe vera contains many important nutrients including amino acids, B group vitamins, polysaccharides, and other nutri- ents that support general health. It also has many phar- macological properties including antioxidant, wound healing, antibacterial, antifungal, antiviral, and immunomodulating effects.12,15,16 The topical skin gel pro- vides healing support for the skin. Recently, the authors demonstrated that aloe vera cream treatment could reduce healing time in patients with burn injury compared to silver cream,17 and it has been demonstrat- ed that this cream facilitates wound healing in posthemorrhoidectomy patients.18 In light of the potential uses for aloe vera in wound healing, the present clinical study was aimed to examine the effect of aloe vera cream in comparison with gauze dressing and placebo cream on the rate of donor site wound healing.

Materials and Methods Aloe vera cream preparation. Pure spray-dried aloe vera powder was used for preparing the aloe vera cream.White liquid paraffin (2 g), stearyl alcohol (7.5 g), cetyl alcohol (7.5 g), solid white paraffin (3 g), and propylene paraben (0.015 g) were mixed and heated to a boil (oil phase). Aloe vera powder (0.5 g) and 70 mL deionized water was added to the mixture with propylene glycol (7 g), sodium luryl sulfate (3 g), and methyl paraben (0.025 g).The mixture was heated until it reached an aqueous state (liquid phase). Next, the oil and liquid were mixed continuously while being gradu- ally cooled. The uniform cream (500 g), once it had cooled, was stored in a plastic package.The cream con- tained 0.5% of the aloe vera gel powder.The preparation was carried out under sterile conditions.The cream was tested for contaminating microbes, and none were found.

Patients and study protocol. Permission to perform the study was granted from the Ethical Committee at Tehran University of Medical Sciences (no.130-362 ),and was carried out in the Plastic Surgery ward at Imam Khomeini Hospital (Tehran, Iran) during 2009 and 2010. The inclusion criterion was undergoing skin graft har- vest of the thigh due to trauma, tumor, or scar. Patients were aged between 12 and 70 years. Exclusion criteria were diabetes mellitus, immunodeficiency state, preg- nancy, and kidney disease. The patients and attendants were given information regarding the drug (aloe vera cream) and written informed consent was obtained from all patients. Forty-five patients were enrolled into this study.After the patients were administered general anes- thesia, the donor site was prepared with 10% povidone- KEYPOINTS • Aloe vera topical skin gel has been found to provide healing support for the skin • Aloe vera has pharmacological properties including antioxidant, wound healing, antibacterial, antifun- gal, antiviral, and immunomodulating effects KEYPOINTS • The test cream contained 0.5% of the aloe vera gel powder • Study patients were those who had a skin graft har- vest from the thigh because of trauma, tumor, or scar • The aloe vera and placebo groups received aloe or base cream on single-layer gauze three times daily, respectively; no topical treatment or dressing was applied in the control group Khorasani et al O immunomodulating effects. O immunomodulating effects. vides healing support for the skin. Recently, the authors O vides healing support for the skin. Recently, the authors demonstrated that O demonstrated that reduce healing time in patients with burn injury O reduce healing time in patients with burn injury compared to silver cream, O compared to silver cream, ed that this cream facilitates wound healing in O ed that this cream facilitates wound healing in posthemorrhoidectomy patients.

O posthemorrhoidectomy patients. In light of the potential uses for O In light of the potential uses for N O T thickness skin graft donor sites.Trials with parallel evalu- N O T thickness skin graft donor sites.Trials with parallel evalu- ations are necessary to answer this question. N O T ations are necessary to answer this question. numerous dressings have been studied, there is not one N O T numerous dressings have been studied, there is not one perfect dressing for use on the donor site that is easy to N O T perfect dressing for use on the donor site that is easy to use, provides patient comfort, prevents infection, is inex- N O T use, provides patient comfort, prevents infection, is inex- pensive, and promotes faster re-epithelization. N O T pensive, and promotes faster re-epithelization. Liliaceae N O T Liliaceae) has been used in tradi- N O T ) has been used in tradi- tional medicine for a long time. N O T tional medicine for a long time. Aloe vera N O T Aloe vera obtained by breaking or slicing its leaf, is the principle N O T obtained by breaking or slicing its leaf, is the principle part of the plant that is used in herbal medicine. N O T part of the plant that is used in herbal medicine. contains many important nutrients including amino N O T contains many important nutrients including amino acids, B group vitamins, polysaccharides, and other nutri- N O T acids, B group vitamins, polysaccharides, and other nutri- ents that support general health. It also has many phar- N O T ents that support general health. It also has many phar- macological properties including antioxidant, wound N O T macological properties including antioxidant, wound healing, antibacterial, antifungal, antiviral, and N O T healing, antibacterial, antifungal, antiviral, and immunomodulating effects.

N O T immunomodulating effects. vides healing support for the skin. Recently, the authors N O T vides healing support for the skin. Recently, the authors D U P L I C A T E and polyvinyl pyrroli- D U P L I C A T E and polyvinyl pyrroli- These dressing materi- D U P L I C A T E These dressing materi- als induce moisture on the wound surface by absorbing D U P L I C A T E als induce moisture on the wound surface by absorbing conduct- D U P L I C A T E conduct- ed a comprehensive systematic review of skin graft D U P L I C A T E ed a comprehensive systematic review of skin graft donor site dressings.They concluded that the evidence D U P L I C A T E donor site dressings.They concluded that the evidence supporting moist wound dressings is weak, and more D U P L I C A T E supporting moist wound dressings is weak, and more methodologically sound, randomized, controlled trials D U P L I C A T E methodologically sound, randomized, controlled trials are needed to determine the optimal dressing for split- D U P L I C A T E are needed to determine the optimal dressing for split- thickness skin graft donor sites.Trials with parallel evalu- D U P L I C A T E thickness skin graft donor sites.Trials with parallel evalu- Although D U P L I C A T E Although healing, the present clinical study was aimed to examine D U P L I C A T E healing, the present clinical study was aimed to examine cream in comparison with gauze D U P L I C A T E cream in comparison with gauze dressing and placebo cream on the rate of donor site D U P L I C A T E dressing and placebo cream on the rate of donor site Materials and Methods D U P L I C A T E Materials and Methods cream preparation. D U P L I C A T E cream preparation. powder was used for preparing the D U P L I C A T E powder was used for preparing the cream.White liquid paraffin (2 g), stearyl alcohol (7.5 g), D U P L I C A T E cream.White liquid paraffin (2 g), stearyl alcohol (7.5 g), cetyl alcohol (7.5 g), solid white paraffin (3 g), and D U P L I C A T E cetyl alcohol (7.5 g), solid white paraffin (3 g), and propylene paraben (0.015 g) were mixed and heated to D U P L I C A T E propylene paraben (0.015 g) were mixed and heated to a boil (oil phase).

D U P L I C A T E a boil (oil phase). Aloe vera D U P L I C A T E Aloe vera deionized water was added to the mixture with D U P L I C A T E deionized water was added to the mixture with propylene glycol (7 g), sodium luryl sulfate (3 g), and D U P L I C A T E propylene glycol (7 g), sodium luryl sulfate (3 g), and methyl paraben (0.025 g).The mixture was heated until D U P L I C A T E methyl paraben (0.025 g).The mixture was heated until it reached an aqueous state (liquid phase). Next, the oil D U P L I C A T E it reached an aqueous state (liquid phase). Next, the oil and liquid were mixed continuously while being gradu- D U P L I C A T E and liquid were mixed continuously while being gradu- ally cooled. The uniform cream (500 g), once it had D U P L I C A T E ally cooled. The uniform cream (500 g), once it had cooled, was stored in a plastic package.The cream con- D U P L I C A T E cooled, was stored in a plastic package.The cream con- tained 0.5% of the D U P L I C A T E tained 0.5% of the was carried out under sterile conditions.The cream was D U P L I C A T E was carried out under sterile conditions.The cream was tested for contaminating microbes, and none were D U P L I C A T E tested for contaminating microbes, and none were found.

D U P L I C A T E found. Patients and study protocol. D U P L I C A T E Patients and study protocol. the study was granted from the Ethical Committee at D U P L I C A T E the study was granted from the Ethical Committee at Tehran University of Medical Sciences (no.130-362 ),and D U P L I C A T E Tehran University of Medical Sciences (no.130-362 ),and D U P L I C A T E Khorasani et al D U P L I C A T E Khorasani et al

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Khorasani et al 46 WOUNDS www.woundsresearch.com iodine solution. All skin grafts were harvested from anterolateral and posterior thigh regions with an electric Padgett Dermatome (Olympus), which was adjusted to 0.014 in.A nurse generated the allocation sequence, and patients were randomly allocated to one of three groups: aloe vera cream (group A [n = 15]),placebo cream (base cream without aloe vera powder, group B [n = 15]) and the control (without topical agent,group C [n = 15]).The dressing was similar for all groups and at the end of skin harvesting, wounds were dressed and bandaged with a layer of petrolatum gauze along with several sterile gauzes.After 2 days, the top dressing layer was removed leav- ing the first gauze layer in place to pre- vent damage to the wounds. No treat- ment or dressing was applied in the control group. The aloe vera and placebo groups received aloe vera or base cream on single-layer gauze three times daily, respectively. Donor site re- epithelization was evaluated postoper- atively on a daily basis until complete re-epithelization and until separation of the single layer gauze could be per- formed without causing the patient further trauma or pain. The time to complete re-epithelization was record- ed for each patient. Wound infection was subjectively measured based on clinical signs of infection (edema, heat, pain, pus discharge, or smell). Another physician, who was blinded to the treatments,clinically assessed all patients.

Statistical Analysis The data were analyzed using SPSS version 10.0 soft- ware. Student’s t test and ANOVA test were used to com- pare the wound size and healing time between two groups and all three groups,respectively.The significance level was determined less than P < 0.05.A Chi-square test was used for descriptive analysis. Results A total of 45 patients (45 donor sites) were enrolled in this study with follow-up until complete healing (Table 1). There were 37 (82.2%) men and 8 (17.8%) women.Significant differences were not found between groups in relation to age or sex.Average total skin graft size was similar between control,aloe vera,and placebo groups (Table 1).The re-epithelization time in the con- trol group was 17 ± 8.6 days (range, 8–37), while in the aloe vera group and placebo group it was 9.7 ± 2.9 days (range, 5–18) and 8.8 ± 2.8 days (range, 4–14), respec- tively (Figure 1). Mean time to wound healing was sig- nificantly different in the control group compared to the aloe vera and placebo groups (P < 0.005).There was not any significant difference in mean re-epithelization time between aloe vera and placebo (base) groups (P = 0.9). There were no allergic reactions or other adverse events (eg,donor site infection) related to the dressings. Figure 1. Mean time from application of dressing to complete re-epithelization.

Base group (n = 15) P* Male/female Age (years) mean ± SD Reason (%) Trauma Scar Bedsore Tumor Reconstruction Area (skin harvest) mean ± SD (cm2 ) 13/2 38.2 ± 13.5 26.7 26.7 13.3 20 13.3 146 ± 104 11/4 35.5 ± 15.6 40 26.7 6.7 20 6.7 140 ± 103 13/2 32.6 ± 15.2 60 20 13.3 6.7 60 114 ± 89 0.05* 0.05* 0.05* *Not significant Table 1. Patient demographics. Aloe group (n = 15) Control group (n = 15) Characteristic O O 46 O 46 WOUNDS O WOUNDS Padgett Dermatome (Olympus), which was adjusted to O Padgett Dermatome (Olympus), which was adjusted to 0.014 in.A nurse generated the allocation sequence, and O 0.014 in.A nurse generated the allocation sequence, and patients were randomly allocated to one of three groups: O patients were randomly allocated to one of three groups: aloe vera O aloe vera cream (group A [n = 15]),placebo cream (base O cream (group A [n = 15]),placebo cream (base cream without O cream without aloe vera O aloe vera the control (without topical agent,group C [n = 15]).The O the control (without topical agent,group C [n = 15]).The dressing was similar for all groups and at the end of skin O dressing was similar for all groups and at the end of skin harvesting, wounds were dressed and bandaged with a O harvesting, wounds were dressed and bandaged with a N O T N O T N O T N O T iodine solution. All skin grafts were harvested from N O T iodine solution. All skin grafts were harvested from anterolateral and posterior thigh regions with an electric N O T anterolateral and posterior thigh regions with an electric Padgett Dermatome (Olympus), which was adjusted to N O T Padgett Dermatome (Olympus), which was adjusted to 0.014 in.A nurse generated the allocation sequence, and N O T 0.014 in.A nurse generated the allocation sequence, and N O T Mean time from application of dressing to N O T Mean time from application of dressing to complete re-epithelization.

N O T complete re-epithelization. D U P L I C A T E D U P L I C A T E layer of petrolatum gauze along with D U P L I C A T E layer of petrolatum gauze along with several sterile gauzes.After 2 days, the D U P L I C A T E several sterile gauzes.After 2 days, the top dressing layer was removed leav- D U P L I C A T E top dressing layer was removed leav- ing the first gauze layer in place to pre- D U P L I C A T E ing the first gauze layer in place to pre- vent damage to the wounds. No treat- D U P L I C A T E vent damage to the wounds. No treat- ment or dressing was applied in the D U P L I C A T E ment or dressing was applied in the control group. The D U P L I C A T E control group. The placebo groups received D U P L I C A T E placebo groups received base cream on single-layer gauze three D U P L I C A T E base cream on single-layer gauze three times daily, respectively. Donor site re- D U P L I C A T E times daily, respectively. Donor site re- epithelization was evaluated postoper- D U P L I C A T E epithelization was evaluated postoper- atively on a daily basis until complete D U P L I C A T E atively on a daily basis until complete re-epithelization and until separation D U P L I C A T E re-epithelization and until separation of the single layer gauze could be per- D U P L I C A T E of the single layer gauze could be per- formed without causing the patient D U P L I C A T E formed without causing the patient further trauma or pain. The time to D U P L I C A T E further trauma or pain. The time to complete re-epithelization was record- D U P L I C A T E complete re-epithelization was record- ed for each patient. Wound infection was subjectively D U P L I C A T E ed for each patient. Wound infection was subjectively measured based on clinical signs of infection (edema, D U P L I C A T E measured based on clinical signs of infection (edema, heat, pain, pus discharge, or smell). Another physician, D U P L I C A T E heat, pain, pus discharge, or smell). Another physician, who was blinded to the treatments,clinically assessed all D U P L I C A T E who was blinded to the treatments,clinically assessed all patients.

D U P L I C A T E patients. Statistical Analysis D U P L I C A T E Statistical Analysis D U P L I C A T E D U P L I C A T E D U P L I C A T E 0.05* D U P L I C A T E 0.05* D U P L I C A T E D U P L I C A T E D U P L I C A T E

Khorasani et al Vol. 23, No. 2 February 2011 47 Discussion This study showed that aloe vera and base creams had wound healing effects on the donor sites after harvest. Re-epithelization time was faster among patients treated with these creams as compared to patients who did not use any topical agent. Conversely, a significant difference in healing times between aloe and base groups was not observed. In cream-treated groups, the creams were applied continuously to the donor sites, which induced a moist wound environment compared to dry gauze dress- ing.The gauze dressing initially provided a moist wound environment, but gradually became desiccated due to evaporation, whereupon the fine-mesh gauze firmly bound to the wound surface, making it more painful to remove than the other moist dressings.5,19 This scenario also impairs the migration of epithelial cells necessary to achieve complete re-epithelization.20 In an evidence-based review,Joel et al21 concluded that moist dressings decrease the days to complete healing as compared to non-moist dressings. Among the broad categories of non-moist and moist-dressing, no differences were found in infection rates between these two types of dressings.21 Other stud- ies showed that a maintenance (foam) dressing did not sig- nificantly reduce wound healing time compared to gauze dressing.19,20 In a systematic review, Wiechula et al2 con- cluded that moist wound healing products have definitive clinical advantages over non-moist products in manage- ment of split-thickness skin graft donor sites.These advan- tages are related to healing, comfort, and infection rates. Although, they conceded that head-to-head studies com- paring products with moisture-retaining properties are needed to determine the optimum moist dressing.2 Moist dressings enhance re-epithelization of partial-thickness wounds by allowing diffusion of oxygen and water vapor, while providing a barrier to the passage of fluid or wound exudate.20 In a recent systematic review, Voineskos et al4 revealed that there is some weak evidence supporting the beneficial effect of moist dressings on wound healing in split-thickness skin graft donor sites. Due to methodologi- cal differences in the previous studies, the authors pro- posed that it is necessary to do parallel randomized clini- cal trials to confirm which is the optimal dressing.4 One advantage of the present study was the use of placebo cream in addition to aloe cream and gauze dressing,which provided reliable data to determine the beneficial effects of aloe vera cream on donor site wounds.

Aloe vera preparations have many biological effects including anti-diabetic, immunomodulatory, anti-inflam- matory, antioxidant, and wound healing effects.22 Aloe vera application was associated with a significant reduc- tion in the wound healing time compared to the con- trol.13 Aloe contains various carbohydrate constituents as polysaccharides. Polysaccharides are known to have properties in skin wound repair.22,23 Additionally, it is believed that the anti-inflammatory effect of aloe vera contributes to faster healing.14,23 Collagen is the major protein in the extracellular matrix and provides strength and integrity to the dermis and other supporting tissues. Aloe vera enhances the production of collagen.24,25 Aloe vera has antimicrobial properties,which can help to prevent wound infection.26 In recent clinical trials, application of aloe cream on wounds was associated with significant wound healing effects in patients with burn injuries and post-hemor- rhoidectomy.17,18 These results showed aloe vera facili- tates the healing process in different wound types.In this study, although the aloe cream exhibited a shorter time to wound healing compared to gauze dressing, its effect was not better than placebo cream.Aloe cream might be more effective at higher concentrations than the 0.5% concentration used in the present study. Both creams induced a moist wound environment as compared to gauze dressing,and maintaining a moist donor site is crit- ical to wound healing.4 Winter27 first described the improvement of wound healing under moist dressings in 1962, but Voineskos et al4 concluded that the evidence supporting that “wet dressings” is weak. In the present study, parallel wet and dry dressings confirmed that a moist environment promotes donor site wound healing. Both creams have several hydrophilic and lipophilic ingredients such as paraffin, propylene glycol, and alco- hol that may be involved in keeping the wound surface moist.The cream’s simple preparation and inexpensive- ness are two advantages that might further encourage commercial production.

Conclusion A topical cream containing aloe vera and a placebo cream enhanced wound healing in split-thickness skin grafts when compared with a dry gauze dressing. KEYPOINTS • Although the aloe cream exhibited a shorter wound healing time compared to gauze dressing, its effect was not better than the placebo cream • Aloe cream might be more effective at higher con- centrations than the 0.5% concentration used in the present study O cal trials to confirm which is the optimal dressing. O cal trials to confirm which is the optimal dressing. advantage of the present study was the use of placebo O advantage of the present study was the use of placebo cream in addition to O cream in addition to provided reliable data to determine the beneficial effects O provided reliable data to determine the beneficial effects of O of aloe vera O aloe vera cream on donor site wounds. O cream on donor site wounds. Aloe vera O Aloe vera preparations have many biological effects O preparations have many biological effects including anti-diabetic, immunomodulatory, anti-inflam- O including anti-diabetic, immunomodulatory, anti-inflam- matory, antioxidant, and wound healing effects. O matory, antioxidant, and wound healing effects. N O T clinical advantages over non-moist products in manage- N O T clinical advantages over non-moist products in manage- ment of split-thickness skin graft donor sites.These advan- N O T ment of split-thickness skin graft donor sites.These advan- tages are related to healing, comfort, and infection rates. N O T tages are related to healing, comfort, and infection rates. Although, they conceded that head-to-head studies com- N O T Although, they conceded that head-to-head studies com- paring products with moisture-retaining properties are N O T paring products with moisture-retaining properties are needed to determine the optimum moist dressing. N O T needed to determine the optimum moist dressing. dressings enhance re-epithelization of partial-thickness N O T dressings enhance re-epithelization of partial-thickness wounds by allowing diffusion of oxygen and water vapor, N O T wounds by allowing diffusion of oxygen and water vapor, while providing a barrier to the passage of fluid or wound N O T while providing a barrier to the passage of fluid or wound In a recent systematic review, Voineskos et al N O T In a recent systematic review, Voineskos et al revealed that there is some weak evidence supporting the N O T revealed that there is some weak evidence supporting the beneficial effect of moist dressings on wound healing in N O T beneficial effect of moist dressings on wound healing in split-thickness skin graft donor sites. Due to methodologi- N O T split-thickness skin graft donor sites. Due to methodologi- cal differences in the previous studies, the authors pro- N O T cal differences in the previous studies, the authors pro- posed that it is necessary to do parallel randomized clini- N O T posed that it is necessary to do parallel randomized clini- cal trials to confirm which is the optimal dressing. N O T cal trials to confirm which is the optimal dressing. advantage of the present study was the use of placebo N O T advantage of the present study was the use of placebo D U P L I C A T E D U P L I C A T E Khorasani et al D U P L I C A T E Khorasani et al concluded that moist dressings decrease D U P L I C A T E concluded that moist dressings decrease the days to complete healing as compared to non-moist D U P L I C A T E the days to complete healing as compared to non-moist dressings. Among the broad categories of non-moist and D U P L I C A T E dressings. Among the broad categories of non-moist and moist-dressing, no differences were found in infection D U P L I C A T E moist-dressing, no differences were found in infection Other stud- D U P L I C A T E Other stud- ies showed that a maintenance (foam) dressing did not sig- D U P L I C A T E ies showed that a maintenance (foam) dressing did not sig- nificantly reduce wound healing time compared to gauze D U P L I C A T E nificantly reduce wound healing time compared to gauze In a systematic review, Wiechula et al D U P L I C A T E In a systematic review, Wiechula et al2 D U P L I C A T E 2 con- D U P L I C A T E con- cluded that moist wound healing products have definitive D U P L I C A T E cluded that moist wound healing products have definitive clinical advantages over non-moist products in manage- D U P L I C A T E clinical advantages over non-moist products in manage- ment of split-thickness skin graft donor sites.These advan- D U P L I C A T E ment of split-thickness skin graft donor sites.These advan- application was associated with a significant reduc- D U P L I C A T E application was associated with a significant reduc- tion in the wound healing time compared to the con- D U P L I C A T E tion in the wound healing time compared to the con- Aloe contains various carbohydrate constituents as D U P L I C A T E Aloe contains various carbohydrate constituents as polysaccharides. Polysaccharides are known to have D U P L I C A T E polysaccharides. Polysaccharides are known to have properties in skin wound repair.

D U P L I C A T E properties in skin wound repair.22,23 D U P L I C A T E 22,23 Additionally, it is D U P L I C A T E Additionally, it is believed that the anti-inflammatory effect of D U P L I C A T E believed that the anti-inflammatory effect of contributes to faster healing. D U P L I C A T E contributes to faster healing.14,23 D U P L I C A T E 14,23 Collagen is the major protein in the extracellular D U P L I C A T E Collagen is the major protein in the extracellular matrix and provides strength and integrity to the dermis D U P L I C A T E matrix and provides strength and integrity to the dermis and other supporting tissues.

D U P L I C A T E and other supporting tissues. Aloe vera D U P L I C A T E Aloe vera production of collagen. D U P L I C A T E production of collagen.24,25 D U P L I C A T E 24,25 Aloe vera D U P L I C A T E Aloe vera properties,which can help to prevent wound infection. D U P L I C A T E properties,which can help to prevent wound infection. In recent clinical trials, application of aloe cream on D U P L I C A T E In recent clinical trials, application of aloe cream on wounds was associated with significant wound healing D U P L I C A T E wounds was associated with significant wound healing effects in patients with burn injuries and post-hemor- D U P L I C A T E effects in patients with burn injuries and post-hemor- rhoidectomy.

D U P L I C A T E rhoidectomy.17,18 D U P L I C A T E 17,18 These results showed D U P L I C A T E These results showed tates the healing process in different wound types.In this D U P L I C A T E tates the healing process in different wound types.In this study, although the aloe cream exhibited a shorter time D U P L I C A T E study, although the aloe cream exhibited a shorter time to wound healing compared to gauze dressing, its effect D U P L I C A T E to wound healing compared to gauze dressing, its effect was not better than placebo cream. D U P L I C A T E was not better than placebo cream. more effective at higher concentrations than the 0.5% D U P L I C A T E more effective at higher concentrations than the 0.5% concentration used in the present study. Both creams D U P L I C A T E concentration used in the present study. Both creams induced a moist wound environment as compared to D U P L I C A T E induced a moist wound environment as compared to gauze dressing,and maintaining a moist donor site is crit- D U P L I C A T E gauze dressing,and maintaining a moist donor site is crit- ical to wound healing.

D U P L I C A T E ical to wound healing.

Khorasani et al 48 WOUNDS www.woundsresearch.com Moisture maintenance on the donor site surface may explain the observed beneficial effects. Acknowledgement This work was supported by a grant (grant number 752) from Tehran University of Medical Sciences, Iran. References 1. Ferreira LM, Blanes L, Gragnani A, et al. Hemicellulose dressing versus rayon dressing in the re-epithelialization of split-thickness skin graft donor sites:a multicenter study. J Tissue Viabil.2009;18(3):88–94. 2. Wiechula R.The use of moist wound-healing dressings in the management of split-thickness skin graft donor sites:a systematic review. Int J Nurs Pract.2003;9(2):S9–17. 3. Hormbrey E, Pandya A, Giele H.Adhesive retention dress- ings are more comfortable than alginate dressings on split- skin-graft donor sites.Br J Plast Surg.2003;56(5):498–503. 4. Voineskos SH,Ayeni OA,McKnight L,Thoma A.Systematic review of skin graft donor-site dressings. Plast Reconstr Surg.2009;124(1):298–306.

5. Giele H. Retention dressings: a new option for donor site dressings. Australas J Dermatol.1997;38(3):166. 6. Uygur F, Evinc R, Ulkur E, Celikoz B. Use of lyophilized bovine collagen for split-thickness skin graft donor site management. Burns.2008;34(7):1011–1014. 7. Tan PW, Ho WC, Song C.The use of Urgotul in the treat- ment of partial thickness burns and split-thickness skin graft donor sites:a prospective control study.IntWound J. 2009;6(4):295–300. 8. Dornseifer U, Fichter AM, Herter F, Sturtz G, Ninkovic M. The ideal split-thickness skin graft donor site dressing: rediscovery of polyurethane film. Ann Plast Surg. 2009;63(2):198–200.

9. Wang TH, Ma H,Yeh FL, Lin JT, Shen BH.The use of “com- posite dressing” for covering split-thickness skin graft donor sites. Burns.2010;36(2):252–255. 10. Lohsiriwat V, Chuangsuwanich A. Comparison of the ionic silver-containing hydrofiber and paraffin gauze dressing on split-thickness skin graft donor sites. Ann Plast Surg. 2009;62(4):421–422. 11. Vogt PM,Hauser J,Rossbach O,et al.Polyvinyl pyrrolidone- iodine liposome hydrogel improves epithelialization by combining moisture and antisepis. A new concept in wound therapy.Wound Repair Regen.2001;9(2):116–122. 12. Hu Q, Hu Y, Xu J. Free radical-scavenging activity of Aloe vera (Aloe barbadensis Miller) extracts by supercritical car- bon dioxide extraction. Food Chem.2005;91:85–90. 13. Maenthaisong R, Chaiyakunapruk N, Niruntraporn S, Kongkaew C.The efficacy of aloe vera used for burn wound healing: a systematic review. Burns. 2007;33(6):713–718.

14. Rodríguez-Bigas M, Cruz NI, Suárez A. Comparative evalua- tion of aloe vera in the management of burn wounds in guinea pigs. Plast Reconstr Surg.1988;81(3):386–389. 15. West DP, Zhu YF. Evaluation of aloe vera gel gloves in the treatment of dry skin associated with occupational expo- sure. Am J Infect Control.2003;31(3):40–42. 16. Rosca-Casian O,Parvu M,Vlase L,Tamas M.Antifungal activ- ity of Aloe vera leaves. Fitoterapia.2007;78(3):219–222. 17. Khorasani G, Hosseinimehr SJ, Azadbakht M, Zamani A, Mahdavi MR.Aloe versus silver sulfadiazine creams for sec- ond-degree burns: a randomized controlled study. Surg Today.2009;39(7):587–591.

18. Eshghi F, Hosseinimehr SJ, Rahmani N, et al.The effects of Aloe vera cream on posthemorrhoidectomy pain and wound healing: results of a randomized, blind, placebo- control study. J Altern Complement Med. 2010;16(6):647- 650. 19. Persson K, Salemark L. How to dress donor sites of split thickness skin grafts: a prospective, randomised study of four dressings. Scand J Plast Reconstr Surg Hand Surg. 2000;34(1):55–59. 20. Weber RS, Hankins P, Limitone E, et al. Split-thickness skin graft donor site management. A randomized prospective trial comparing a hydrophilic polyurethane absorbent foam dressing with a petrolatum gauze dressing. Arch Otolaryngol Head Neck Surg.1995;121(10):1145–1149. 21. Beam JW. Management of superficial to partial-thickness wounds. J Athl Train.2007;42(3):422–424. 22. Hamman JH. Composition and applications of Aloe vera leaf gel. Molecules.2008;13(8):1599–1616. 23. JiaY,Zhao G,Jia J.Preliminary evaluation:the effects ofAloe ferox Miller and Aloe arborescens Miller on wound heal- ing. J Ethnopharmacol.2008;120(2):181–189. 24. Chithra P, Sajithlal GB, Chandrakasan G. Influence of Aloe vera on collagen turnover in healing of dermal wounds in rats. Indian J Exp Biol.1998;36(9):896–901. 25. Chithra P, Sajithlal GB, Chandrakasan G. Influence of Aloe vera on the glycosaminoglycans in the matrix of healing dermal wounds in rats. J Ethnopharmacol. 1998;59:179–186.

26. Agarry O, Olaleye MT, Bello-Michael CO. Comparative antimicrobial activities of aloe vera gel and leaf. Afr J Biotechnol.2005;4(12):1413–1414. 27. Spear M, Bailey A.Treatment of skin graft donor sites with a unique transparent absorbent acrylic dressing. Plast Surg Nurs.2009;29(4):194–200. O O 48 O 48 WOUNDS O WOUNDS 11. Vogt PM,Hauser J,Rossbach O,et al.Polyvinyl pyrrolidone- O 11. Vogt PM,Hauser J,Rossbach O,et al.Polyvinyl pyrrolidone- iodine liposome hydrogel improves epithelialization by O iodine liposome hydrogel improves epithelialization by combining moisture and antisepis. A new concept in O combining moisture and antisepis. A new concept in wound therapy.

O wound therapy. 12. Hu Q, Hu Y, Xu J. Free radical-scavenging activity of Aloe O 12. Hu Q, Hu Y, Xu J. Free radical-scavenging activity of Aloe vera (Aloe barbadensis Miller) extracts by supercritical car- O vera (Aloe barbadensis Miller) extracts by supercritical car- bon dioxide extraction. O bon dioxide extraction. 13. Maenthaisong R, Chaiyakunapruk N, Niruntraporn S, O 13. Maenthaisong R, Chaiyakunapruk N, Niruntraporn S, N O T ment of partial thickness burns and split-thickness skin N O T ment of partial thickness burns and split-thickness skin graft donor sites:a prospective control study N O T graft donor sites:a prospective control study.IntWound J N O T .IntWound J graft donor sites:a prospective control study.IntWound J graft donor sites:a prospective control study N O T graft donor sites:a prospective control study.IntWound J graft donor sites:a prospective control study 8. Dornseifer U, Fichter AM, Herter F, Sturtz G, Ninkovic M. N O T 8. Dornseifer U, Fichter AM, Herter F, Sturtz G, Ninkovic M. The ideal split-thickness skin graft donor site dressing: N O T The ideal split-thickness skin graft donor site dressing: rediscovery of polyurethane film.

N O T rediscovery of polyurethane film. Ann Plast Surg N O T Ann Plast Surg 2009;63(2):198–200. N O T 2009;63(2):198–200. 9. Wang TH, Ma H,Yeh FL, Lin JT, Shen BH.The use of “com- N O T 9. Wang TH, Ma H,Yeh FL, Lin JT, Shen BH.The use of “com- posite dressing” for covering split-thickness skin graft N O T posite dressing” for covering split-thickness skin graft Burns N O T Burns.2010;36(2):252–255. N O T .2010;36(2):252–255. 10. Lohsiriwat V, Chuangsuwanich A. Comparison of the ionic N O T 10. Lohsiriwat V, Chuangsuwanich A. Comparison of the ionic silver-containing hydrofiber and paraffin gauze dressing N O T silver-containing hydrofiber and paraffin gauze dressing on split-thickness skin graft donor sites. N O T on split-thickness skin graft donor sites. 2009;62(4):421–422.

N O T 2009;62(4):421–422. 11. Vogt PM,Hauser J,Rossbach O,et al.Polyvinyl pyrrolidone- N O T 11. Vogt PM,Hauser J,Rossbach O,et al.Polyvinyl pyrrolidone- iodine liposome hydrogel improves epithelialization by N O T iodine liposome hydrogel improves epithelialization by D U P L I C A T E D U P L I C A T E .2003;56(5):498–503. D U P L I C A T E .2003;56(5):498–503. 4. Voineskos SH,Ayeni OA,McKnight L,Thoma A.Systematic D U P L I C A T E 4. Voineskos SH,Ayeni OA,McKnight L,Thoma A.Systematic Plast Reconstr D U P L I C A T E Plast Reconstr 5. Giele H. Retention dressings: a new option for donor site D U P L I C A T E 5. Giele H. Retention dressings: a new option for donor site .1997;38(3):166.

D U P L I C A T E .1997;38(3):166. 6. Uygur F, Evinc R, Ulkur E, Celikoz B. Use of lyophilized D U P L I C A T E 6. Uygur F, Evinc R, Ulkur E, Celikoz B. Use of lyophilized bovine collagen for split-thickness skin graft donor site D U P L I C A T E bovine collagen for split-thickness skin graft donor site .2008;34(7):1011–1014. D U P L I C A T E .2008;34(7):1011–1014. 7. Tan PW, Ho WC, Song C.The use of Urgotul in the treat- D U P L I C A T E 7. Tan PW, Ho WC, Song C.The use of Urgotul in the treat- ment of partial thickness burns and split-thickness skin D U P L I C A T E ment of partial thickness burns and split-thickness skin Kongkaew C.The efficacy of aloe vera used for burn D U P L I C A T E Kongkaew C.The efficacy of aloe vera used for burn wound healing: a systematic review. D U P L I C A T E wound healing: a systematic review. 14. Rodríguez-Bigas M, Cruz NI, Suárez A. Comparative evalua- D U P L I C A T E 14. Rodríguez-Bigas M, Cruz NI, Suárez A. Comparative evalua- tion of aloe vera in the management of burn wounds in D U P L I C A T E tion of aloe vera in the management of burn wounds in Plast Reconstr Surg D U P L I C A T E Plast Reconstr Surg.1988;81(3):386–389. D U P L I C A T E .1988;81(3):386–389. 15. West DP, Zhu YF. Evaluation of aloe vera gel gloves in the D U P L I C A T E 15. West DP, Zhu YF. Evaluation of aloe vera gel gloves in the treatment of dry skin associated with occupational expo- D U P L I C A T E treatment of dry skin associated with occupational expo- Am J Infect Control D U P L I C A T E Am J Infect Control.2003;31(3):40–42. D U P L I C A T E .2003;31(3):40–42. 16. Rosca-Casian O,Parvu M,Vlase L,Tamas M.Antifungal activ- D U P L I C A T E 16. Rosca-Casian O,Parvu M,Vlase L,Tamas M.Antifungal activ- ity of Aloe vera leaves.

D U P L I C A T E ity of Aloe vera leaves. Fitoterapia D U P L I C A T E Fitoterapia 17. Khorasani G, Hosseinimehr SJ, Azadbakht M, Zamani A, D U P L I C A T E 17. Khorasani G, Hosseinimehr SJ, Azadbakht M, Zamani A, Mahdavi MR.Aloe versus silver sulfadiazine creams for sec- D U P L I C A T E Mahdavi MR.Aloe versus silver sulfadiazine creams for sec- ond-degree burns: a randomized controlled study. D U P L I C A T E ond-degree burns: a randomized controlled study. Today D U P L I C A T E Today.2009;39(7):587–591. D U P L I C A T E .2009;39(7):587–591. 18. Eshghi F, Hosseinimehr SJ, Rahmani N, et al.The effects of D U P L I C A T E 18. Eshghi F, Hosseinimehr SJ, Rahmani N, et al.The effects of Aloe vera cream on posthemorrhoidectomy pain and D U P L I C A T E Aloe vera cream on posthemorrhoidectomy pain and wound healing: results of a randomized, blind, placebo- D U P L I C A T E wound healing: results of a randomized, blind, placebo- control study.

D U P L I C A T E control study. 650. D U P L I C A T E 650. 19. Persson K, Salemark L. How to dress donor sites of split D U P L I C A T E 19. Persson K, Salemark L. How to dress donor sites of split thickness skin grafts: a prospective, randomised study of D U P L I C A T E thickness skin grafts: a prospective, randomised study of four dressings. D U P L I C A T E four dressings. 20. Weber RS, Hankins P, Limitone E, et al. Split-thickness skin D U P L I C A T E 20. Weber RS, Hankins P, Limitone E, et al. Split-thickness skin

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