Diaphragmatic Dysfunction After Supraclavicular Brachial Plexus Block

Status Completed

Clinical Trial Summary

The investigators plan to determine the onset time and incidence of hemidiaphragmatic paresis (HDP) with a double injection supraclavicular nerve block in patients presenting for upper extremity surgery below the elbow.

The hypothesis is HDP following supraclavicular brachial plexus block occurs with-in 15 minutes of block performance and is not associated with subjective dyspnea.

Clinical Trial Description

This study will be an observational trial to assess the onset time and incidence of hemidiaphragmatic paresis in patients who undergo the double injection ultrasound-guided supraclavicular block. Diaphragmatic dysfunction will be determined by intercostal diaphragm thickening measured using ultrasound. The available image will be saved.

Patients having below the elbow surgery will be be approached by someone from the research team for consent and possible inclusion in the study. This will be done in the anesthesia preoperative assessment clinic, or in the pre-op area on the day of surgery (if a patient was not seen in clinic).

A baseline ultrasonographic diaphragmatic assessment will be completed. Study participants will then receive supraclavicular brachial plexus block as per standard of care. Ultrasonographic diaphragmatic assessment and dyspnea score (using modified Borg dyspnea scale) will be performed every 5 minutes for 30 minutes, or until the patient is transferred to the operating room, whatever comes first. Patients will also undergo an ultrasonographic diaphragmatic assessment and dyspnea score in the recovery room after their surgery. ;

Study Design

Related Conditions & MeSH terms

Anesthesia

Clinical Trial Details

NCT number	NCT03596190
Study type	Interventional
Source	Nova Scotia Health Authority
Contact
Status	Completed
Phase	N/A
Start date	August 21, 2018
Completion date	August 8, 2019

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