Ex vivo evaluation of a novel suture loop method for equine intestinal biopsies.
Authors: Munsterman Amelia S, VanderBroek Ashley R, Kottwitz Jack J, Watson Victoria E
Journal: Veterinary surgery : VS
Summary
# Editorial Summary: Suture Loop Method for Equine Intestinal Biopsies A novel suture loop biopsy (SLB) technique using a 4S Roeder knot and barbed suture has been evaluated against the conventional hand-sutured biopsy (HSB) method in equine intestinal tissue, with comparable structural integrity demonstrated across duodenal, jejunal, and large colon samples from eight horses post-mortem. Although both techniques produced full-thickness biopsies with similar bursting pressures and wall tension (no significant difference between methods, p = .998 and p = .852 respectively), the hand-sutured approach yielded larger tissue samples with more reliable mucosal and villous architecture for histological interpretation. The primary advantage of the suture loop method lies in its potential for adaptation to laparoscopic biopsy protocols, offering technical simplification and reduced operative time in standing or anaesthetised horses where access is limited. However, the smaller sample size and reduced mucosal yield with SLB warrant caution regarding diagnostic utility, particularly where subtle histopathological changes are critical—practitioners should recognise that this technique remains experimental and requires further clinical validation before routine adoption in diagnostic protocols.
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Practical Takeaways
- •The novel suture loop biopsy method offers comparable structural integrity to traditional hand-sutured technique, with potential advantage of laparoscopic adaptability for minimally invasive intestinal sampling
- •Hand-sutured biopsies currently yield superior tissue samples for histologic diagnosis with better mucosal preservation, so may remain preferable for diagnostic purposes until SLB technique is optimized
- •Any biopsy technique will compromise local intestinal wall strength; clinical protocols should account for this reduced bursting pressure in healing predictions
Key Findings
- •Suture loop biopsy (SLB) method produced equivalent bursting pressures and wall tension compared to hand-sutured biopsy (HSB) technique (p=0.998 and p=0.852 respectively)
- •Both biopsy methods resulted in lower bursting pressures than control tissue with no biopsy (p<0.009)
- •Hand-sutured biopsy samples were larger and more likely to contain intact mucosa and villi for histologic diagnosis compared to suture loop method
- •Intraluminal diameter changes were similar between SLB and HSB methods (p>0.16)