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Related Experiment Video

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Dissection of the Transversus Abdominis Muscle for Whole-mount Neuromuscular Junction Analysis
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Three different approaches to Transversus abdominis planeblock: a cadaveric study.

Zoka Milan1, Dominic Tabor, Patricia McConnell

  • 1Department of Anaesthesia, St James's University Hospital, Beckett St, Leeds, United Kingdom. z.millan@leeds.ac.uk

Medicinski Glasnik : Official Publication of the Medical Association of Zenica-Doboj Canton, Bosnia and Herzegovina
|August 19, 2011
PubMed
Summary

The subcostal approach for transversus abdominis plane (TAP) blocks resulted in a significantly larger dye spread area compared to the mid-axillary approach in this cadaver study, with varying nerve involvement across all three methods.

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Area of Science:

  • Anatomy
  • Regional Anesthesia
  • Surgical Analgesia

Background:

  • The transversus abdominis plane (TAP) block is a recognized technique for anterior abdominal wall analgesia.
  • Optimal access points for TAP block remain a subject of debate.
  • Understanding dye spread is crucial for effective nerve blockade.

Purpose of the Study:

  • To compare the dye spread of 40 mL in TAP blocks using subcostal, mid-axillary, and lumbar triangle of Petit (LTOP) approaches.
  • To evaluate nerve involvement with each TAP block access point.
  • To provide anatomical data for optimizing TAP block techniques.

Main Methods:

  • A cadaveric study involving 13 embalmed human subjects.
  • Injection of 40 mL of black dye into the TAP via subcostal (9), mid-axillary (9), and LTOP (8) approaches.
  • Dissection, dye spread tracing, digital photography, and mathematical analysis of dye spread areas.

Main Results:

  • The mean dye spread areas were 85.1 cm² (subcostal, T7-L1), 58.9 cm² (mid-axillary, T10-L1), and 77.9 cm² (LTOP, T10-L1).
  • A statistically significant difference (p<0.01) was observed between the subcostal and mid-axillary approaches.
  • Distinct patterns of nerve involvement were noted for each approach.

Conclusions:

  • The subcostal approach demonstrated a larger dye spread area compared to the mid-axillary approach in this cadaveric model.
  • Different TAP block approaches result in varied anatomical spread and nerve coverage.
  • Findings suggest the subcostal approach may offer broader analgesia for anterior abdominal wall structures.