Left displaced abomasum in dairy cows: open surgical correction (omentopexy/pyloropexy) vs blind toggle-pin fixation — POSSIBLE (the treatment made no difference)

In dairy cows with left displaced abomasum, how do open surgical correction (right paramedian abomasopexy or pyloro-omentopexy) and blind toggle-pin (bar suture / roll-and-toggle) fixation compare for success, complications and subsequent milk production?

Shelf #180 · gate-verified and approved by the developer

POSSIBLE (the treatment made no difference): Yes — at least one genuinely randomised comparison exists in this literature: Kelton 1988 randomly assigned 59 cows and found no significant differences between toggle-pin fixation and open right paramedian abomasopexy in return to normal milk production or feed intake, mortality, culling rate, tissue reaction at the surgical site, or redisplacement up to 60 days into the subsequent lactation. Bartlett 1995 (72 cows from one herd, blindly assigned) agrees on outcomes — comparable survival in the herd and daily milk production over 120 days — and adds the economic difference: mean total cost $256.50 for roll-and-toggle versus $406.40 for pyloro-omentopexy, with a possible interaction making open surgery several times more costly in the 9 cases with severe metritis. The honest bottom line is equivalence on cow outcomes with a cost advantage to the blind technique, not superiority of either operation. Gaps: small, old, single-centre/single-herd studies; no comparison powered for the rare catastrophic complications of blind fixation; laparoscopic techniques are not covered by the carded records. Drafted Nov 10, 2026 (VetMed build, topic #180); all figures from abstracts fetched and verified at drafting.

Kelton 1988: no significant differences between toggle-pin fixation and open abomasopexy in milk return, feed intake, mortality, culling or redisplacement (59 cows, randomly assigned)

Comparative Study (publication type); randomised assignment stated in the abstract ('randomly assigned')

Who: Cattle: 59 dairy cows with left displacement of the abomasum in a referral/university setting (Cornell University), randomly assigned to right paramedian abomasopexy via laparotomy (n = 28) or percutaneous fixation of the abomasum using the bar suture (toggle pin) technique (n = 31), compared at 4 follow-up examinations extending to 60 days into the subsequent lactation.

Result: Comparisons of the 2 groups, at 4 follow-up examinations, yielded no significant differences in return to normal milk production, return to normal feed intake, mortality, culling rate, tissue reaction at the surgical site, or redisplacement up to 60 days into the subsequent lactation.

Watch out: A null result in 59 cows cannot exclude moderate differences in uncommon outcomes such as death or redisplacement. The record's publication type is Comparative Study — it is not indexed as a randomised controlled trial — and no blinding is stated; randomisation rests on the abstract's own wording.

Kelton DF, Garcia J, Guard CL, Dinsmore RP, Powers PM, Smith MC, Stehman S, Ralston N, White ME. Bar suture (toggle pin) vs open surgical abomasopexy for treatment of left displaced abomasum in dairy cattle. Journal of the American Veterinary Medical Association. 1988;193(5):557-9. PMID: 3049489. Registry ID: none in the record. MeSH: Abomasum/surgery · Animals · Cattle · Cattle Diseases/surgery · Stomach Diseases/surgery · Stomach Diseases/veterinary · Suture Techniques/veterinary

Bartlett 1995: roll-and-toggle and pyloro-omentopexy gave comparable survival and milk production over 120 days, but mean total cost was $256.50 vs $406.40 (72 cows)

Clinical Trial and Controlled Clinical Trial (publication types); cows 'blindly assigned' to treatment in the abstract's own wording — blinding of outcome assessment is not stated

Who: Cattle: 72 lactating dairy cows with left displacement of the abomasum, all from the same large dairy herd (field setting, Michigan State University), blindly assigned to treatment by the roll-and-toggle procedure or right paralumbar fossa pyloro-omentopexy, with survival in the herd and daily milk production measured for 120 days after treatment.

Result: The mean cost was $256.50 for roll-and-toggle cases ($50 for the procedure, $95.70 in milk loss and $110.80 in livestock losses). The mean cost was $406.40 for the pyloro-omentopexy cases ($150 for the procedure, $87.80 in milk loss, and $168.60 in livestock losses). A possible interaction with metritis was discovered, in that pyloro-omentopexy cases cost about $100 more than roll-and-toggle cases when metritis was absent (31 cases) or moderate (32 cases), and cost several times more when metritis was severe (9 cases). The authors concluded that the closed repositioning and stabilization techniques are generally less expensive and have comparable results with open techniques.

Watch out: 'Blindly assigned' describes treatment allocation in the record's own wording; the record does not state that outcome assessors were blinded, and no randomisation method is described. All cows came from one herd, the costs are that herd's 1995 US dollar figures, and the severe-metritis subgroup is only 9 cases.

Bartlett PC, Kopcha M, Coe PH, Ames NK, Ruegg PL, Erskine RJ. Economic comparison of the pyloro-omentopexy vs the roll-and-toggle procedure for treatment of left displacement of the abomasum in dairy cattle. Journal of the American Veterinary Medical Association. 1995;206(8):1156-62. PMID: 7768736. Registry ID: none in the record. MeSH: Abomasum · Animals · Cattle · Cattle Diseases/economics · Cattle Diseases/surgery · Cattle Diseases/therapy · Costs and Cost Analysis · Dairying/economics · Endometritis/economics · Endometritis/veterinary · Female · Lactation · Omentum/surgery · Pyloric Antrum/surgery · Stomach Diseases/economics · Stomach Diseases/surgery · Stomach Diseases/therapy · Stomach Diseases/veterinary · Suture Techniques/economics · Suture Techniques/veterinary

Synthesis: no outcome advantage for open surgery in either assigned comparison; the consistent difference is cost, not cow outcomes

Synthesis

Who: Synthesis of the cards above: Kelton 1988 (59 cows, randomly assigned, referral setting, right paramedian abomasopexy vs bar-suture toggle-pin fixation) and Bartlett 1995 (72 cows, blindly assigned, single large herd, right paralumbar fossa pyloro-omentopexy vs roll-and-toggle).

Result: (1) Neither comparison found a significant outcome advantage for open surgery: Kelton found no differences in return to normal milk production or feed intake, mortality, culling, surgical-site tissue reaction or redisplacement; Bartlett found comparable survival and milk production over 120 days. (2) The consistent difference is economic: in Bartlett's herd the closed roll-and-toggle cost on average $256.50 per case against $406.40 for open pyloro-omentopexy, driven by procedure cost and livestock losses rather than milk loss ($95.70 vs $87.80).

Watch out: Combined carded numbers are 131 cows from two studies now decades old; neither was powered for rare complications of blind fixation (such as fixation of the wrong structure), which the comparative records cannot quantify. The open techniques also differ between the cards (paramedian abomasopexy vs paralumbar pyloro-omentopexy), so 'open surgery' here is a family of operations, not one procedure.

Synthesis of Kelton DF et al. PMID: 3049489; Bartlett PC et al. PMID: 7768736. Registry IDs as on the individual cards.

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