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Effectiveness of a bipolar vessel sealant device for sealing uterine horns and bodies from dogs.

OBJECTIVE
To compare the bursting strength of a vessel sealant device (VSD) with that of an encircling suture on uterine horns and bodies from dogs.


SAMPLE
Uteri from 24 shelter dogs with unknown reproductive histories. PROCEDURES-Uterine horns and bodies were allocated to groups to be sealed with suture or a VSD. Uteri were then infused with saline (0.9% NaCl) solution until the seals burst or the uteri reached a maximal pressure of 300 mm Hg. Variables recorded included dog age, uterine body and horn diameter, and maximal pressure. RESULTS-The median (range) bursting pressure reached in sealed uterine horns was 300 (0 to 300) mm Hg for the VSD group and 300 (200 to 300) mm Hg for the suture group. Within the VSD group, seals of 2 of 3 uterine horns with a diameter ≥ 9 mm burst before intraluminal pressure reached 100 mm Hg, compared with 1 of 21 uterine horns with a diameter < 9 mm. The median bursting pressure for uterine bodies was 237 (0 to 300) mm Hg for the VSD group versus 300 (175 to 300) mm Hg for the suture group. Within the VSD group, seals in uterine bodies with a diameter ≥ 9 mm failed at a significantly lower pressure (125 [0 to 125]) mm Hg than those with a diameter < 9 mm (275 [125 to 300]) mm Hg. CONCLUSIONS AND CLINICAL RELEVANCE-The failure pressure for both sealing techniques was high, which indicated that the VSD may be a safe instrument for sealing the uterine horn in dogs. Given the low mean bursting pressure for seals in uterine bodies with large diameters, the VSD cannot be recommended for sealing uterine bodies ≥ 9 mm in diameter.