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Related Concept Videos

Local Anesthetics: Clinical Application as Spinal Anesthesia01:11

Local Anesthetics: Clinical Application as Spinal Anesthesia

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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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...
Local Anesthetics: Clinical Application as Epidural Anesthesia01:29

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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.
Since epidural anesthetics can be infused through an epidural catheter, all types of drugs, including short-acting ones, can be administered. Chloroprocaine and lidocaine are examples of short and long-duration anesthetics, respectively. Bupivacaine...

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Auditory function after spinal anaesthesia: the effect of differently designed spinal needles.

Atilla Erol1, Ahmet Topal, Hamdi Arbag

  • 1Department of Anaesthesiology and Intensive Care, Meram Medical Faculty, Selcuk University, Konya, Turkey. atillaerol@yahoo.com

European Journal of Anaesthesiology
|June 13, 2009
PubMed
Summary

Using ballpen and pencil-point spinal needles significantly reduces hearing loss after spinal anesthesia compared to Quincke needles. These needle types are recommended to minimize auditory complications post-procedure.

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Area of Science:

  • Anesthesiology
  • Audiology
  • Neurosurgery

Background:

  • Hearing loss is a reported complication following spinal anesthesia.
  • The type of spinal needle used may influence the incidence of hearing loss.

Purpose of the Study:

  • To investigate the impact of different spinal needle types (Quincke, ballpen, pencil-point) on postoperative hearing loss.
  • To compare the incidence of hearing changes using pure-tone audiometry.

Main Methods:

  • A randomized study involving 45 patients undergoing spinal anesthesia for inguinal herniorraphy.
  • Patients were allocated to receive spinal anesthesia via 25-gauge Quincke, ballpen, or pencil-point needles.
  • Pure-tone audiometry was conducted postoperatively to assess hearing function.

Main Results:

  • Significantly more patients experienced >10 dB hearing loss with Quincke needles compared to ballpen and pencil-point needles on postoperative day 1.
  • No significant difference in hearing changes was observed between ballpen and pencil-point needle groups.

Conclusions:

  • Ballpen and pencil-point spinal needles are associated with reduced hearing loss after spinal anesthesia.
  • These needle types are preferable for minimizing auditory side effects.