Diaphragm-sparing Nerve Blocks for Shoulder Arthroplasty

Diaphragm-sparing Nerve Blocks for Shoulder Arthroplasty: an Exploratory Feasibility Study

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT03877835

Enrollment

Registered

2019-03-18

Start date

2019-03-18

Completion date

2020-08-31

Last updated

2021-01-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Shoulder Disease

Brief summary

The combination of a modified lateral sagittal infraclavicular block and a suprascapular nerve block has not been studied in a cohort of total arthroplasty patients. Such diaphragm-sparing nerve blocks for shoulder arthroplasty may provide a very good anesthetic alternative in lung diseased patients who are in need for total arthroplasty of the shoulder.

Detailed description

The investigators hypothesized that a combination of suprascapular nerve block and lateral sagittal infraclavicular block of the posterior and lateral cords would provide good postoperative analgesia for patients undergoing shoulder arthroplasty. The primary aims of this study were to document numeric rating scale (NRS, 0-10) and use of morphine equivalents during the first 24 hours after surgery. Secondary aims were to determine the incidence of diaphragm paresis 30 minutes after the block and to quantify postoperative hand grip force at 1 hr.

Interventions

PROCEDUREPeripheral nerve blocks

LSIB + SSNB

Study design

Allocation

Intervention model

SINGLE_GROUP

Primary purpose

TREATMENT

Masking

NONE

Masking description

Outcome measures will be performed by an independent assessor

Intervention model description

Single intervention

Eligibility

Sex/Gender

ALL

Age

18 Years to 80 Years

Healthy volunteers

Inclusion criteria

* 18-78 years old, * BMI 20-35 kg.m-2 * ASA physical status 1-3

Exclusion criteria

* unable to consent, * pregnancy, * pre-existing severe respiratory disease, * use of anticoagulation drugs other than acetylsalicylic acid or dipyridamol, * allergy to local anaesthetics, * patients on regular opioids, * atrioventricular block, * peripheral neuropathy.

Design outcomes

Primary

Measure	Time frame	Description
NRS	Postoperatively at 1 hour	Pain on a 0-10 scale where 0=no pain and 10=unbearable pain
The incidence ipsilateral hemidiaphragmatic paralysis after 30 minutes	30 minutes after the blocks	Hemidiaphragmatic paralysis was defined as the absence of diaphragmatic motion during normal respiration, coupled with absent or (paradoxical) cranial diaphragmatic movement when the patient forcefully sniffed.

Countries

Norway

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026