Which muscle is not punctured while doing a thoracic procedure in the mid-axillary line:
- Innermost intercostals
- Transverses thoracis
- External intercostals
- Internal intercostals
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The Correct option is B
Explanation with High Yield Facts :
- During a thoracic procedure in mid-axillary line, the external & internal intercostal muscles are always punctured.
- Inner most layer: Of the three group of muscles in this layer, the innermost intercostals are at the side of the rib cage,
- Subcostalis are at the back and Transversus thoracis at the front of the thoracic cage.
- Hence, Transversus thoracis will not be punctured in a mid axillary line approach.
NOTE: Transversus thoracis muscle was formerly called as sterno-costalis, more exactly. In fact, now TRANSVERSUS THORACIS includes all the three inner layer muscles, namely - Subcostalis, innermost intercostal (intercostalis intimi) and the sterno-costalis.
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