TY - JOUR
T1 - A Modified Burn Comb Model With a New Dorsal Frame That Allows for Local Treatment in Partial-Thickness Burns in Rats
AU - Weiss, Fabian
AU - Agua, Kariem
AU - Weinzierl, Andrea
AU - Schuldt, Anna
AU - Egana, Jose Tomas
AU - Schlitter, Anna Melissa
AU - Steiger, Katja
AU - Machens, Hans Günther
AU - Harder, Yves
AU - Schmauss, Daniel
N1 - Publisher Copyright:
© 2022 The Author(s). Published by Oxford University Press on behalf of the American Burn Association. All rights reserved.
PY - 2022/11/1
Y1 - 2022/11/1
N2 - Burn wound progression (BWP) leads to vertical and horizontal injury extension. The "burn comb model"is commonly used, in which a full-thickness burn with intercalated unburned interspaces is induced. We aimed to establish an injury progressing to the intermediate dermis, allowing repeated wound evaluation. Furthermore, we present a new dorsal frame that enables topical drug application. Eight burn fields and six interspaces were induced on each of 17 rats' dorsa with a 10-second burn comb application. A developed 8-panel aluminum frame was sutured onto 12 animals and combined with an Elizabethan collar. Over 14 days, macroscopic and histologic wound assessment and laser speckle contrast imaging (LSCI) were performed besides evaluation of frame durability. The 10-second group was compared with nine animals injured with a full-thickness 60-second model. Frame durability was sufficient up to day 4 with 8 of the 12 frames (67%) still mounted. The 60-second burn led to an increased extent of interspace necrosis (P =. 002). The extent of necrosis increased between days 1 and 2 (P =. 001), following the 10-second burn (24% ± SEM 8% to 40% ± SEM 6%) and the 60-second burn (57% ± SEM 6% to 76% ± SEM 4%). Interspace LSCI perfusion was higher than burn field perfusion. It earlier reached baseline levels in the 10-second group (on day 1: 142% ± SEM 9% vs 60% ± SEM 5%; P <. 001). Within day 1, the 10-second burn showed histological progression to the intermediate dermis, both in interspaces and burn fields. This burn comb model with its newly developed fixed dorsal frame allows investigation of topical agents to treat BWP in partial-thickness burns.
AB - Burn wound progression (BWP) leads to vertical and horizontal injury extension. The "burn comb model"is commonly used, in which a full-thickness burn with intercalated unburned interspaces is induced. We aimed to establish an injury progressing to the intermediate dermis, allowing repeated wound evaluation. Furthermore, we present a new dorsal frame that enables topical drug application. Eight burn fields and six interspaces were induced on each of 17 rats' dorsa with a 10-second burn comb application. A developed 8-panel aluminum frame was sutured onto 12 animals and combined with an Elizabethan collar. Over 14 days, macroscopic and histologic wound assessment and laser speckle contrast imaging (LSCI) were performed besides evaluation of frame durability. The 10-second group was compared with nine animals injured with a full-thickness 60-second model. Frame durability was sufficient up to day 4 with 8 of the 12 frames (67%) still mounted. The 60-second burn led to an increased extent of interspace necrosis (P =. 002). The extent of necrosis increased between days 1 and 2 (P =. 001), following the 10-second burn (24% ± SEM 8% to 40% ± SEM 6%) and the 60-second burn (57% ± SEM 6% to 76% ± SEM 4%). Interspace LSCI perfusion was higher than burn field perfusion. It earlier reached baseline levels in the 10-second group (on day 1: 142% ± SEM 9% vs 60% ± SEM 5%; P <. 001). Within day 1, the 10-second burn showed histological progression to the intermediate dermis, both in interspaces and burn fields. This burn comb model with its newly developed fixed dorsal frame allows investigation of topical agents to treat BWP in partial-thickness burns.
UR - http://www.scopus.com/inward/record.url?scp=85141888390&partnerID=8YFLogxK
U2 - 10.1093/jbcr/irac032
DO - 10.1093/jbcr/irac032
M3 - Article
C2 - 35259276
AN - SCOPUS:85141888390
SN - 1559-047X
VL - 43
SP - 1329
EP - 1336
JO - Journal of Burn Care and Research
JF - Journal of Burn Care and Research
IS - 6
ER -