CHAPTER 9 Obstetrical Instruments for Large Animals
This section covers instruments that are used to assist with obstetrical difficulties and breeding and infertility issues.
INSTRUMENT
Cow Catheter
| FUNCTION | To catheterize the bladder. |
| CHARACTERISTICS | This stainless steel catheter has a scooped-out area just before the tip. |
INSTRUMENT
Obstetrical Chains and Handles
| FUNCTION | To assist with the delivery of a calf. |
| COMMON NAME | OB Chains and OB Handles |
| CHARACTERISTICS | The chains are flat links that prevent trauma to the calf’s legs. The handles have a hook that fits onto the chains at any link for optimal directional and pulling power. |
INSTRUMENT
Fetal Extractor
| FUNCTION | To assist with the delivery of a calf. |
| COMMON NAME | Calf Puller |
| CHARACTERISTICS | The strap on the brace piece is placed over the hips of the cow. Obstetrical (OB) chains or straps are attached to the legs of the calf. Along the shaft of the calf puller is a come-along, which is a cable attached to a ratchet that reels the cable into a spool. The cable is attached to the OB chains, and the user gently inches the calf out of the cow, while working with the cow’s contractions and at the correct angles. |
INSTRUMENT
Calf Snare
| FUNCTION | To assist with the delivery of a calf. |
| CHARACTERISTICS | This nylon-coated cable is equipped with a locking device that will not tighten down on the body part to which it is attached. This is very useful in pulling a head into proper alignment and keeping it in place until the calf is delivered. |
INSTRUMENT
Obstetrical Wire
| FUNCTION | To disarticulate a dead fetus so as to aid in its removal. |
| COMMON NAME | OB Wire |
| CHARACTERISTICS | This is a rough cablelike material that cuts through bone and sinew when it is rubbed back and forth. As parts are removed, the calf can be pulled from the cow. |
INSTRUMENT
Obstetrical Wire Guide
| FUNCTION | To help guide the OB wire to the appropriate area for cutting. |
| CHARACTERISTICS | A curved handle ends in a weighted bulb in which the wire is threaded. |
INSTRUMENT
Fetotomy Knife
| FUNCTION | To disarticulate a dead fetus so as to aid in its removal. |
| CHARACTERISTICS | This instrument is designed to fit into the palm of the hand. The index finger is slipped into the ring and curled over the top of the blade. This allows the knife to be directed to the appropriate area for cutting. |
INSTRUMENT
Krey Obstetrical Hook
| FUNCTION | To hold onto the fetus while performing an embryotomy. |
| COMMON NAME | OB Hook |
| CHARACTERISTICS | The hooks bite into the fetus to hold it steady. |
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