Interscalene vs Anterior and Posterior Suprascapular Nerve Block for Shoulder Arthroscopic Surgeries

Changi General Hospital60 enrolled

Overview

To compare ISB vs anterior and posterior approaches of suprascapular block in terms of lung function and analgesia

Interscalene block (ISB) is commonly used to provide pain control for shoulder surgeries. However, it is associated with several side effects, in particular, a high incidence of phrenic nerve blockade. The suprascapular nerve block (SSB) has been proposed as an alternative to the ISB as it has a lower likelihood of causing phrenic nerve blockade. There are 2 commonly used approaches for the suprascapular nerve block, anterior and posterior. The anterior approach may still result in some degree of impairment of lung function. The primary aim is to assess the pulmonary function after performance of ISB, aSSB and pSSB. Secondary outcomes are analgesic effects and incidence of adverse effects of these blocks.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

TRIPLE

Enrollment

Conditions

Arthroscopic Shoulder Surgery Interscalene Block Suprascapular Nerve Block

Interventions

ISBPROCEDURE

ISB block with 0.5% ropivicaine 15mls ( 45mg )

aSSBPROCEDURE

aSSB block with 0.5% ropivicaine 15mls ( 45mg )

pSSBPROCEDURE

pSSB block with 0.5% ropivicaine 15mls ( 45mg )

Eligibility

Sex: ALLMin age: 21 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Patients scheduled for elective arthroscopic shoulder surgery under general anaesthesia * Patients 21 years old and above * American Society of Anesthesiologists (ASA) physical status 1 to 3 * BMI 18-35 kg/m2 Exclusion Criteria: * Patients unable to give consent or inability to communicate/ cooperate * Patients with chronic use of strong opioids (morphine, oxycodone) * Patients with allergy to local anaesthetics or any drugs included in the study * Patients with contraindications for regional anaesthesia such as coagulopathy * Patients with pre-existing neurological deficits in upper limb/ phrenic nerve palsy * Patients with pre-existing lung disease (COPD, uncontrolled asthma)

Locations (1)

Changi General Hospital

Singapore, Singapore

Outcomes

Primary Outcomes

Pulmonary function

To assess the pulmonary function after performance of interscalene, anterior and posterior approaches to the suprascapular block

Time frame: 2 years

Secondary Outcomes

Analgesic effects and complications

Analgesic effect (pain scores, opioid consumption, opioid related side effects), degree of motor blockade and incidence of adverse effects of blocks (Horner's syndrome, hoarseness of voice)

Time frame: 2 years

Data from ClinicalTrials.gov

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