[Effect of commonly practiced manoeuvres in vascular microsurgery. Study under the scanning electron microscope (author's transl)].
The authors studied in 100 Wistar rats the manoeuvres that may commonly be carried out during vascular microanastomosis of diameter less than 3 mm (aorta and posterior vena cava): clamping for 30 to 45 minutes, bipolar electrocoagulation of the collateral arteries, more or less marked pinching of the vascular wall. The risk of thrombosis seems all the greater when: --the surgeon is inexperienced: viz. trauma with the forceps, parietal tears at the level of the stitches, two many threads passed for hemostasis (all these factors accentuate the fibrinoid and platelet deposits); --bipolar electrocoagulation of a collateral artery applied too close to the vessel to be anastomosed (less than 1 mm.)The formation of a smooth and regular fibrinous pseudo-intima appears within 48 to 72 hours which may explain the elective onset of thromboses before this delay.
D000818:Animals; D001011:Aorta / Q000648:ultrastructure*; D005260:Female; D008297:Male; D008866:Microsurgery / Q000009:adverse effects*; D011183:Postoperative Complications; D051381:Rats; D013536:Suture Techniques; D013927:Thrombosis / Q000209:etiology; D014656:Vascular Surgical Procedures / Q000009:adverse effects*; D014683:Vena Cava, Superior / Q000648:ultrastructure*
Retentissement des manoeuvres couramment pratiquées en microchirurgie vasculaire. Etude au microscope électronique à balayage.