Bovine Obstetrical Instruments: Complete Guide for Difficult Calvings

Difficult Calvings: Why Specialized Instruments Save Lives

Dystocia — difficult calving — is the most critical obstetrical emergency in cattle practice. Every bovine practitioner deals with it regularly. In many cases, the difference between a live calf and a dead one, or between a cow that breeds again next season and one that does not, is the correct application of the right instrument under time pressure.

Fizza Surgical manufactures bovine obstetrical instruments at our Sialkot facility, supplying veterinary distributors and farm animal practices across Europe and the Middle East. Here is the core bovine obstetrics instrument set and what each tool is designed to do.

Calving Ropes and Handles

Calving Ropes

Braided or twisted obstetrical rope (8–10 mm diameter, 1.5–2 m length) is the most basic bovine obstetrical tool. Loops are placed around the calf’s head, neck, or limbs for traction. Soft cotton or nylon braided ropes are preferred because they are gentle on the calf’s skin and easy to clean.

Calving Handles

Wooden or stainless steel T-bar handles threaded onto calving ropes give the operator mechanical purchase for manual traction. Using handles reduces rope strain on the operator’s hands during prolonged traction.

Calf Puller (Fetal Extractor)

A mechanical device that uses a ratchet mechanism to apply controlled traction to the fetus. The calf puller has a curved body plate that rests against the cow’s perineum as a bracing point, connected to a chain and hook mechanism that attaches to calving snares on the calf’s limbs or head.

The ratchet allows gradual, controlled force application in synchrony with the cow’s uterine contractions. This coordination is critical — applying traction between contractions against a relaxed cervix can cause cervical and vaginal tears. The mechanical advantage of the calf puller is approximately 3:1 over manual traction, which is sufficient for most malposition cases.

Calf Snare (Obstetrical Snare)

A loop-and-handle instrument used to place a secured loop around the calf’s lower limb (fetlock) or head/jaw. The snare handle is passed into the uterus, the loop is positioned around the target structure, and the handle is used to tighten the loop before applying traction.

Snares are available as single-handle (for one limb at a time) or double-handle designs. The loop material is stainless cable or heavy braided wire.

Repulsion Crutch (Repeller)

Used to push the fetus back into the uterus to allow reposition during malposition correction. A long-handled instrument (60–80 cm) with a cup-shaped or crook-shaped end that engages the calf’s presenting part to provide controlled backward pressure while the operator repositions the malpositioned limb or head with the other hand.

Working in a confined uterus with one hand pushing the fetus and the other repositioning a limb is technically demanding. The repeller provides the force needed without requiring excessive arm penetration, which risks contamination and operator exhaustion.

Fetotomy Wire and Handle

Fetotomy is performed on a dead fetus that cannot be delivered intact. A serrated wire (fetotomy wire) is passed around specific parts of the fetus using a long wire introducer, then pulled back and forth using T-bar handles to cut through the fetal body. This reduces the overall diameter of the fetus so it can be delivered.

Fetotomy is a welfare-sensitive procedure requiring specific training. The instruments include: fetotomy wire (50–80 cm lengths), wire introducer (catheter or steel guide), and wire handles. Wire handles are rigid or flexible loops that the operator uses to apply the sawing force to the wire.

Vaginal Retaining Instrument (Prolapse Retainer)

Used after replacing a uterine or vaginal prolapse to temporarily retain the tissue while the cow is sutured. The Buhner suture needle and Buhner tape are the most common instruments for this — a large-bore curved needle is used to place a purse-string suture around the vulva to prevent re-prolapse until healing occurs.

Bovine Obstetrical Instrument Set Summary

Materials and Quality

Fizza Surgical bovine obstetrical instruments are manufactured from surgical-grade stainless steel with satin finish. CE marked and ISO 13485:2016 compliant. We supply individual instruments and complete farm animal obstetrics sets with CE documentation. Contact us for a catalog and pricing for veterinary distributors and large animal practices.