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Updated: Sep 21, 2026

Utero-tubal Embryo Transfer and Vasectomy in the Mouse Model
09:33

Utero-tubal Embryo Transfer and Vasectomy in the Mouse Model

Published on: February 28, 2014

Comparison of two local anaesthetics in transvaginal ultrasound-guided oocyte retrieval

H Godoy1, P Erard, L De Munck

  • 1Centre for Reproductive Medicine, Dutch Speaking Brussels Free University (Vrije Universiteit Brussel), Belgium.

Human Reproduction (Oxford, England)
|July 1, 1993
PubMed

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Local anesthetics (LAs) block the sodium channels of nerve trunks, sensory nerve endings, and neuromuscular junctions. Although LAs can block all kinds of nerves, the sensitivity of nerve fibers differs according to nerve types and structures. LAs are known to block myelinated fibers faster than unmyelinated ones. Also, they block pain or sensory neurons at low concentrations without affecting the motor neurons involved in muscle contractions. This helps relieve labor pain without affecting the...
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Spinal anesthetics are given during lower abdomen and limb surgeries to block sensory and motor neurons. They are administered in the mid to low lumbar regions, primarily acting on the cauda equina's nerve roots. The blockade level depends on the local anesthetic (LA) concentration. Usually, low LA concentrations are sufficient to block sensory fibers, while only high LA concentrations block motor fibers. Other factors like injection volume and speed, the patient's posture, and the drug...
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Epidural anesthetics are administered in the fat-filled epidural space, the outermost part of the spinal canal. This technique is commonly employed for pain management and anesthesia during lower abdomen and pelvis surgeries or labor and delivery.
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