[Single-layer colonic anastomoses using polyglyconate (Maxon) vs. two-layer anastomoses using chromic catgut and silk. Experimental study].
BACKGROUND
The safety of an intestinal anastomosis is usually measured by its complication rate, especially the incidence of anastomotic leakage. A wide variety of methods have been described to reestablish intestinal continuity including single-layer continuous or two-layer interrupted anastomosis.


OBJECTIVE
To evaluate if the single-layer continuous anastomosis using polygluconate is safer and reliable than two-layer interrupted anastomosis with chromic catgut and silk.


METHODS
A prospective, experimental, randomized and comparative analysis was conducted in 20 dogs. They were divided in two groups; group 1 underwent two-layer interrupted anastomosis and group 2 underwent sigle-layer continuous technique. Anastomoses were timed. Both groups were under observation. Anastomotic leakage, and other complications were evaluated. The animals were sacrified and the anastomosis was taken out together with 10 cm of colon on both sides of the anastomosis. Breaking strength, histologic evaluation and hydroxyproline determination were performed.


RESULTS
Ten two-layer anastomosis and ten single-layer anastomosis were performed. A median of 25 minutes (range: 20-30 minutes) was required to construct the anastomoses in group 1 versus 20 minutes (range: 12-25 minutes) in group 2. All animals survived and no leakage was observed. Wound infection ocurred in four dogs (20%). Median breaking strength was 230 mm Hg in group 1 and 210 mm Hg in group 2. Hydroxyproline concentration was 8.94 mg/g in group 1 (range: 5.33-16.71) and 9.94 mg/g in group 2 (range: 2.96-21.87). There was no difference among groups about the inflammatory response evaluated by pathology. There was no statistical significance in any variable evaluated. CONCLUIONS: This study demonstrates that a single-layer continuous is similar in terms of safety to the two-layer technique, but because of its facility to perform, the single-layer technique could be superior.
García-Osogobio
Sandra Minerva
SM
Departamento de Cirugía, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Tlalpan, México, DF.
Takahashi-Monroy
Takeshi
T
Velasco
Liliana
L
Gaxiola
Miguel
M
Sotres-Vega
Avelina
A
Santillán-Doherty
Patricio
P
D000714:Anastomosis, Surgical / Q000379:methods*; D000818:Animals; D002398:Catgut; D003106:Colon / Q000737:chemistry / Q000473:pathology / Q000601:surgery*; D004285:Dogs; D005260:Female; D006909:Hydroxyproline / Q000032:analysis; D008297:Male; D011108:Polymers; D011312:Pressure; D047011:Silk; D013529:Surgical Wound Dehiscence; D013536:Suture Techniques; D013537:Sutures; D014945:Wound Healing
D011108:Polymers; D047011:Silk; C046409:polyglyconate; D006909:Hydroxyproline