Short- and long-term outcomes of polyethylene band attenuation of congenital extrahepatic portosystemic shunts in dogs

Post-operative complications occurred in 10 of 60 dogs

The objectives of this study were to report the short- and long-term outcomes following attenuation of congenital extrahepatic portosystemic shunts in dogs using a novel polyethylene band.  

Records were retrospectively reviewed for dogs that underwent congenital extrahepatic portosystemic shunt attenuation by a polyethylene banding technique at a single institution between 2010 and 2020.  

Short-term outcome data were collected from peri-operative clinical records with follow-up examinations scheduled at six and 18 weeks post-operatively, and post-operative imaging when performed. Long-term follow-up was collected by validated owner questionnaires, telephone interviews or medical records. Long-term outcomes were categorized by "excellent,” "good" or "poor.”  

Sixty dogs were included in the study. Post-operative complications occurred in 10 of 60 dogs (16.7%), four major and six minor, with a peri-operative mortality of 6.7%.  

Persistent shunting was identified in nine of 53 dogs (17%) available for follow-up examination and four dogs underwent a revision surgery. Long-term follow-up was available for 44 dogs at a median of 75 months post-operatively (range 7 to 128).  

Long-term outcomes were "excellent" (26) or "good" (8) in 81.8% of dogs and "poor" (8) in 18.2%.  

At the time of follow-up, 30 of 44 (68.2%) dogs were not receiving any medical treatment and 27 of 28 (96.4%) questionnaire respondents were satisfied with the response to surgery.  

The authors conclude that polyethylene band attenuation of congenital extrahepatic portosystemic shunts provides comparable outcomes to cellophane. The material used in this study is widely available and consistent while also being pre-sterilized and pre-folded, making it easy to use.

O Glenn, et al. “Short- and long-term outcomes of polyethylene band attenuation of congenital extrahepatic portosystemic shunts in dogs: 60 cases (2010-2020).” J Small Anim Pract. 2022 Sep 11. doi: 10.1111/jsap.13552.

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