Surgery Clinical Trial
Official title:
Diaphragmatic Paralysis After Ultrasound Block of the Suprascapular Nerve for Shoulder Surgery : Incidence and Influence of the Approach
Shoulder surgery is a source of intense postoperative pain that justifies the use of opioids. In this context, analgesia provided by locoregional anesthesia (ALR) improves the rehabilitation of patients by reducing the length of hospital stay and morphine consumption. Thus anesthesia of the brachial plexus interscalene (interscalene block or BIS) is considered as the reference technique for the management of post-operative pain after shoulder surgery. It is however provider of hemi-diaphragmatic paralysis (PhD) in nearly 100% of cases. Thus, this technique is usually avoided in patients with respiratory insufficiency. In arthroscopic shoulder surgery, the development of a suprascapular and axillary nerve (SSAX) conjugate block appears to be an effective analgesic alternative in this context.
Two ultrasound-guided approaches of the suprascapular nerve (anterior and posterior
approaches) have been described in the literature. From an anatomical point of view, the
anterior approach could expose patients to the risk of ipsilateral PhD by phrenic nerve block
secondary to diffusion of the local anesthetic into the supraclavicular region.
By measuring the diaphragm excursion during a sniff test, ultrasound allows reliable and
reproducible analysis of the diaphragm function.
No study has evaluated the incidence of PhD after ultrasound block of the suprascapular
nerve. Knowing the influence of the approach on this complication could be of major interest
in this context.
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