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HALS-ovariohysterectomy in horses
Hand-Assisted Laparoscopic Ovariohysterectomy (HALS) is performed in other species. Is it an alternative to the `classic` ovariohysterectomy in horses via ventral midline laparotomy? This brand new study gives the results of 8 mares - 50 percent of them recuperated well after surgery, 50 percent did not survive.

Eight, 11-24-year-old mares with anatomically normal urogenital tracts were included in this experimental study.

The surgical technique was developed in 2 non-survival mares and subsequently evaluated in 6 survival procedures.
Food was withheld for 48 hours, then mares were anesthetized and positioned in dorsal recumbency for laparoscopic surgery. A hand access device (Omniport) was placed followed by 4 laparoscopic portals. Transection of the ovarian pedicles and broad ligaments was achieved using a combination of a laparoscopic stapling instrument (Endo GIA II), an ultrasonically activated instrument (Harmonic Scalpel®), and endoscopic clips (Endo Clip II ML). The genital tract was exteriorized through the laparotomy, and the uterus transected and sutured in a conventional pattern.
Horses were evaluated through postoperative day 14 when a necropsy was performed.

Results: Four mares recuperated well after surgery, 1 mare was euthanatized because of bilateral femur fracture during anesthetic recovery, and another developed severe pleuropneumonia.
At necropsy all but 1 abdominal incision was healing routinely.
One mare had abscessed along the celiotomy incision and developed visceral adhesions. Uncomplicated healing of transected mesovarial, mesometrial, and uterine remnants was observed.

Thus, ovariohysterectomy in horses can be accomplished using HALS technique.
HALS-OHE technique represents a minimally invasive and technically feasible alternative for conventional OHE. Careful patient selection and preparation may reduce the complications observed. The HALS technique may be useful in other laparoscopic surgical procedures.

Source: Delling, Uta, Howard, Rick D., Pleasant, R.Scott & Lanz, Otto I. (2004): Hand-Assisted Laparoscopic Ovariohysterectomy in the Mare. In: Veterinary Surgery 33 (5), 487-494.








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