Evaluation of The Effect of Bupivacaine (Marcaine) in Reducing Early Post Tonsillectomy Pain

King Saud University

Status and phase

Unknown

Phase 4

Conditions

Tonsillectomy

Treatments

Drug: Bupivacaine

Drug: normal saline

Study type

Interventional

Funder types

Other

Identifiers

NCT01582022

E-12-598

Details and patient eligibility

About

Research Methodology:

It will be a prospective, randomized, placebo-controlled, single-blind, intra-individual study in which one tonsillar fossa will be the tested side, and the other fossa will be the control. And the tested side will be packed with bupivacaine for five minutes. In the other hand, the controlled side will be packed for five minutes with gauze soaked in normal saline. The selection of the tested side and controlled side will be randomized based on the last digit in the medical record number (i.e. if the last digit is even then the tested side is the right and if the last digit is odd then the tested side is the left). Pain evaluation will be by visual analog scale and it will be in frequency of 2, 4, 6, 8, 12, 24 hours post-op.

Full description

Evaluation of The Effect of Bupivacaine (marcaine) in Reducing Early Post Tonsillectomy Pain (Prospective, randomized, intra-individual study.) Study guidelines

Aim of the study

to evaluate the effectiveness of applying bupivacaine intra-operative in reducing early post-tonsillectomy pain

Patients and methods

It will be a randomized, placebo-controlled, single-blinded study
one tonsillar fossa will be the tested side, and the other fossa will be the control
to insure the random selection, the tested and control sides will be selected based on unpredicted method e.g. based on the last number in pt MRN: If the last # is even (0, 2, 4, 6, 8) = right side will be the tested If the last # is odd (1, 3, 5, 7, 9) = left side will be the tested
Exclusion criteria included :
1. pt with past history of unilateral peritonsillar abscess
2. the current, regular use of a systemic steroid or NSAID
3. a known hypersensitivity to bupivacaine
4. a combined with unilateral myringotomy or bilateral myringotomy with unilateral ventilation tube
5. pt with poor dental hygiene
accompanied adenoidectomy is not an exclusion criteria
the tested side will be : packed (after classic tonsillectomy) with gauze soaked in 0.5% bupivacaine, (2ml of bupivacaine + 2ml NS)for 5 min.
the control side will undergoing the same of tested side but with normal saline
post-operative analgesia will be paracetamol
pain evaluation will be by visual analog scale (fig. 1) and it will be in frequency of 2, 4, 6, 8, 12, 24 hours post-op (frequency can be re-adjusted)
Data of pain will be collected by the nurse. And they will not know which side is the tested. (single- blind)
after phase I (data collection). Data will be calculated for P-value and other statistics scores
Targeted sample size is 35 patients.
patients will be consented for the possible adverse reactions of local application of the tested medicine (e.g. allergic reactions, Paresthesia). However, because in our study we will not add adrenaline, so differences in incidence of post-tonsillectomy bleeding is not expected.
data will be statistically analyzed by McNemar's test
For the data safety monitoring of the study, an independent external otolaryngology consultant (Dr.Ahmed Alarfij) will be assigned to monitor the safety of study participants.

Sex

All

Volunteers

No Healthy Volunteers

Inclusion criteria

all patients undergoing tonsillectomy

Exclusion criteria

pt with past history of unilateral peritonsillar abscess
the current, regular use of a systemic steroid or NSAID
a known hypersensitivity to bupivacaine
a combined with unilateral myringotomy or bilateral myringotomy with unilateral ventilation tube
pt with poor dental hygiene