TY - JOUR
T1 - Bipolar electrocautery
T2 - A rodent model of sunderland third-degree nerve injury
AU - Moradzadeh, Arash
AU - Brenner, Michael J.
AU - Whitloch, Elizabeth L.
AU - Tong, Alice Y.
AU - Luciano, Janina P.
AU - Hunter, Daniel A.
AU - Myckatyn, Terence M.
AU - Machinnon, Susan E.
PY - 2010/1
Y1 - 2010/1
N2 - Objective: To determine the Sunderland classification of a bipolar electrocautery injury. Methods: Twenty-two rats received crush (a reproducible Sunderland second-degree injury) or bipolar electrocautery injury and were evaluated for functional, his-tomorphometric, and immunohistochemical recovery at 21 or 42 days. Animal experiments were performed between July 3 and December 12, 2007. Axonal regeneration and end plate reinnervation were evaluated in double transgenic cyan fluorescent protein - conjugated Thyl and green fluorescent protein - conjugated S100 mice. Results: Compared with crush injury, bipolar electrocautery injury caused greater disruption of myelin and neurofilament architecture at the injury site and decreased nerve fiber counts and percentage of neural tissue distal to the injury (P= .007). Complete functional recovery was seen after crush but not bipolar electrocautery injury. Serial live imaging demonstrated axonal regeneration at week 1 after crush and at week 3 after bipolar electrocautery injury. Qualitative assessment of motor end plate reinnervation at 42 days demonstrated complete neuromuscular end plate reinnervation in the crush group and only limited reinnervation in the bipolar electrocautery group. Conclusion: Bipolar electrocautery injury in a rodent model resulted in a Sunderland third-degree injury, characterized by gradual, incomplete recovery without intervention.
AB - Objective: To determine the Sunderland classification of a bipolar electrocautery injury. Methods: Twenty-two rats received crush (a reproducible Sunderland second-degree injury) or bipolar electrocautery injury and were evaluated for functional, his-tomorphometric, and immunohistochemical recovery at 21 or 42 days. Animal experiments were performed between July 3 and December 12, 2007. Axonal regeneration and end plate reinnervation were evaluated in double transgenic cyan fluorescent protein - conjugated Thyl and green fluorescent protein - conjugated S100 mice. Results: Compared with crush injury, bipolar electrocautery injury caused greater disruption of myelin and neurofilament architecture at the injury site and decreased nerve fiber counts and percentage of neural tissue distal to the injury (P= .007). Complete functional recovery was seen after crush but not bipolar electrocautery injury. Serial live imaging demonstrated axonal regeneration at week 1 after crush and at week 3 after bipolar electrocautery injury. Qualitative assessment of motor end plate reinnervation at 42 days demonstrated complete neuromuscular end plate reinnervation in the crush group and only limited reinnervation in the bipolar electrocautery group. Conclusion: Bipolar electrocautery injury in a rodent model resulted in a Sunderland third-degree injury, characterized by gradual, incomplete recovery without intervention.
UR - http://www.scopus.com/inward/record.url?scp=76749128880&partnerID=8YFLogxK
U2 - 10.1001/archfacial.2009.104
DO - 10.1001/archfacial.2009.104
M3 - Article
C2 - 20083740
AN - SCOPUS:76749128880
SN - 1521-2491
VL - 12
SP - 40
EP - 47
JO - Archives of Facial Plastic Surgery
JF - Archives of Facial Plastic Surgery
IS - 1
ER -