Artificial perineurium to enhance nerve recovery from damage after neurolysis.
We have developed a novel biodegradable poly-lactide (PLA) film (honeycomb film) with a micropatterned porous structure on one side. We hypothesized that this film could be used as a substitute for perineurium. We used two types of thin PLA film: honeycomb film and cast film with smooth surfaces on both sides. In a rat extensive internal neurolysis model, the nerve was wrapped with honeycomb film (group H) or cast film (group CA), or left unwrapped (group C). Histological and functional analyses were performed. The honeycomb film closely attached to the nerve surface but did not adhere to surrounding tissues. In contrast, nerves in group C displayed severe adhesion to the neural bed. Mean percent wet muscle weight and motor nerve conduction velocity were significantly higher in group H than in group C. The honeycomb film prevents nerve adhesion and enhances functional recovery after extensive neurolysis.
Okui
Nobuyuki
N
Department of Hand Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan. n-okui@med.nagoya-u.ac.jp
Yamamoto
Michiro
M
Fukuhira
Yukako
Y
Kaneko
Hiroaki
H
Hirata
Hitoshi
H
D020341:Absorbable Implants; D000200:Action Potentials; D000818:Animals; D001187:Artificial Organs; D049428:Blood-Nerve Barrier / Q000473:pathology / Q000503:physiopathology; D006614:Hindlimb; D008297:Male; D009046:Motor Neurons; D018482:Muscle, Skeletal / Q000473:pathology; D009431:Neural Conduction; D009929:Organ Size; D010525:Peripheral Nerves / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D010523:Peripheral Nervous System Diseases / Q000517:prevention & control*; D011091:Polyesters; D011184:Postoperative Period; D051381:Rats; D011917:Rats, Inbred Lew; D012584:Sciatic Nerve / Q000473:pathology / Q000601:surgery; D000267:Tissue Adhesions / Q000517:prevention & control
D011091:Polyesters; C033616:poly(lactide)