Does noise reduction with ear muffs in patients under general anaesthetic reduce post-operative analgesia requirements?

Not Applicable

• Conditions: Post operative pain; Noise exposure; Anaesthesiology - Pain management

• Registration Number: ACTRN12616000503426
• Lead Sponsor: Tobia Snook

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2016-04-19
• Last Update Posted: 13 January 2020

Recruitment & Eligibility

• Status: Stopped early
• Sex: All
• Target Recruitment: 30

Inclusion Criteria

Patients undergoing general anaesthetic for a required surgical procedure
LMA or ETT airways used.
Age over 16.
Normal hearing.
Normal cognition.
Surgical position suitable to wearing earmuffs (supine, prone, lithotomy).
Used a PCA post op.

Exclusion Criteria

Deaf.
Dementia or mental disability.
Lateral position.
Surgical field not suitable to wearing earmuffs eg head/neck/shoulder surgery.
Neuraxial anaesthesia (spinal, epidural)
Peripheral nerve blocks
Light sedation only
Patients who were maintaining their own airway
Transferring from or to the intensive care unit prior to or after surgery.
Weight over 120kg
BMI over 40
Renal failure defined as eGFR < 30
Pregnant patients
Lack of English comprehension to the degree it precludes obtaining informed consent without a translator.

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Post operative opiate use from PCA (Patient Controlled Analgesia) pump. This is done by reviewing the medical records as all PCA dosing information is transcribed to the PCA chart as routine care. [24 hours, starting at the induction of anaesthesia. This is to include the induction dose of opiate. ]

Secondary Outcome Measures

Name	Time	Method
Pain scores, verbal scale either 0-5 or 1-10 depending on the ward and nursing habits. We will convert all scores to a 0-10 scale for uniformity and comparison. [First 24 hours. The frequency of routine observations which includes checking the pain score will vary considerably between patients and is not being standardised. Any recorded pain scores per 6 hour period will be used. If the pain scores are not recorded frequently enough then will have to reduce to every 8-10 hours. ]