NCT04596787

Bilateral Thoracic Paravertebral Blocks in Obese and Non-obese Patients Undergoing Reduction Mammaplasty

The Performance Properties and Efficacy of Ultrasound-Guided Bilateral Thoracic Paravertebral Blocks in Obese and Non-obese Patients Undergoing Reduction Mammaplasty: A Historical Cohort Study

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 82 (actual)
• Sponsor: Istanbul University · Academic / Other
• Sex: Female
• Age: 18 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

Aim: Although regional anesthesia (RA) techniques are advantageous in the anesthetic management of obese patients (body mass index (BMI)≥30); their performances can still be associated with technical difficulties and greater failure rates. The aim of this study is to compare the performance properties and analgesic efficacy of ultrasound (US)-guided bilateral thoracic paravertebral blocks (TPVBs) in obese and non-obese patients. Material methods: After obtaining ethics committee approval; data of 82 patients, who underwent elective bilateral reduction mammaplasty under general anesthesia with adjunctive TPVB analgesia between December of 2016 and February of 2020, were reviewed. Patients were allocated into two groups with respect to their BMI scores (Group NO: BMI\<30 and Group O: BMI≥30). Demographics, TPVB ideal US image visualization and performance times, needle tip visualisation and TPVB performance difficulties, number of needle maneuvers, surgical, anesthetic and analgesic follow-up parameters, incidence of postoperative nausea vomiting (PONV), sleep duration, length of postanesthesia care unit (PACU) and hospital stay, patient and surgeon satisfaction scores were all investigated and compared.

Detailed description

Aim: The number of obese patients (body mass index (BMI)≥30) has increased dramatically worldwide, and we, as anesthesiologists, routinely come up against them in our daily clinical practice. Although the preference of various peripheral and neuroaxial regional anesthesia (RA) techniques seems to be advantageous in the anesthetic management of these patients, their performances can also be associated with technical difficulties and greater failure rates. The aim of this study is to compare the performance properties and analgesic efficacy of ultrasound (US)-guided thoracic paravertebral blocks (TPVBs) in obese and non-obese patients. Material methods: After obtaining ethics committee approval; data of 82 patients, who underwent elective bilateral reduction mammaplasty under general anesthesia with adjunctive TPVB analgesia between December of 2016 and February of 2020, were reviewed. Patients were allocated into two groups with respect to their BMI scores (Group NO: BMI\<30 and Group O: BMI≥30). Demographics, TPVB ideal US image visualization and performance times, needle tip visualisation and TPVB performance difficulties, number of needle maneuvers, surgical, anesthetic and analgesic follow-up parameters, incidence of postoperative nausea vomiting (PONV), sleep duration, length of postanesthesia care unit (PACU) and hospital stay, patient and surgeon satisfaction scores were all investigated and compared. Student's t, Mann-Whitney-U and Chi-square tests were used for statistical analysis.

Conditions

• Pain, Postoperative
• Obesity
• Thoracic Paravertebral Blocks
• Ultrasound
• Performance

Interventions

Type	Name	Description
PROCEDURE	Bilateral Thoracic paravertebral block	The blocks were performed at the T3-T4 level bilaterally to block the dermatomes between the T2 and T6 levels (breast innervation area).

Timeline

• Start date: 2016-12-01
• Primary completion: 2020-02-28
• Completion: 2020-02-28
• First posted: 2020-10-22
• Last updated: 2020-10-22