The Effect of Propofol Induction Based on Lean Body Weight on the Depth of Anesthesia

NCT06862245 | Completed

• 1 other identifier: Propofol induction doses
• Study Type: interventional
• Target: 120
• Locations: 1 country
• Sites: 1

Brief Summary

Propofol has significant hemodynamic side effects. It is a lipophilic agent and is generally used at a dose of 2-2.5 mg/kg for induction. In patients with a body mass index (BMI) greater than 25, it can lead to serious complications. This patient group often has comorbidities such as hypertension, coronary artery disease, left ventricular hypertrophy, stroke, and obstructive sleep apnea. Hemodynamic profile changes are influenced by both the rate of propofol administration and the total dose. Therefore, it is necessary to investigate the appropriate dose and infusion rate of propofol during anesthesia induction. The primary aim of this study is to compare the effects of propofol induction doses, determined based on total body weight and lean body weight (calculated using tomography), on anesthesia depth using BIS and SedLine monitoring in patients with BMI \>25. The secondary aim of the study is to compare propofol induction doses calculated using two different methods in terms of:

• Mean arterial pressure (MAP),
• Frequency of hypotension (MAP \<65),
• Frequency of Trendelenburg position or vasopressor requirement and their response,
• Tachycardia (heart rate \>100 bpm),
• Frequency of hypertension (SBP \>140). Additionally, the sensitivity and delay rates of BIS and SedLine monitoring in determining anesthesia depth were compared. A total of 120 patients undergoing general anesthesia for urological surgeries at our hospital were included in the study. Patients were randomized into two groups (Group T/Group L). All patients were taken to the operating room, and in addition to routine monitoring, BIS and SedLine monitoring were provided. All patients received 1 mcg/kg of fentanyl.
• Group T received propofol at a dose of 2-2.5 mg/kg based on total body weight.
• Group L received propofol at a dose of 2-2.5 mg/kg based on lean body weight, which was calculated from CT imaging by a radiologist.
• Propofol was administered at a rate of 100 mg/min. The laryngeal mask will be placed once an adequate depth of anesthesia is achieved. All data were recorded at 2-minute intervals for 6 minutes before and after induction. The collected data were statistically analyzed for comparison.

Conditions

Propofol Adverse Reaction

Keywords

lean body weight; propofol adverse reaction; general anaesthesia

Outcome Measures

Primary Outcomes (2)

• anaesthesia debt based on BIS (bispectral index)

  Anesthesia depth was assessed using BIS (bispectral index) monitoring before and after induction and recorded every 2 minutes. A numeric value is recorded in the range of 0-100.

  30 minute

• anaesthesia debt based on the SedLine value

  Anesthesia depth was assessed using SedLine monitoring before and after induction and recorded every 2 minutes. A numeric value is recorded in the range of 0-100.

  30 minute

Secondary Outcomes (4)

• mean arterial pressure

  30 minute

• trendelenburg

  30 minute

• vasopressor

  30 minute

• heart

  30 minute

Study Arms (2)

Group T

ACTIVE COMPARATOR

A total of 120 patients undergoing general anesthesia for urological surgeries at our hospital were included in the study. Patients were randomized into two groups (Group T/Group L). All patients were taken to the operating room, and in addition to routine monitoring, BIS and SedLine monitoring were provided. All patients received 1 mcg/kg of fentanyl. Group T received propofol at a dose of 2-2.5 mg/kg based on total body weight. Propofol was administered at a rate of 100 mg/min. The laryngeal mask will be placed once an adequate depth of anesthesia is achieved. All data were recorded at 2-minute intervals for 6 minutes before and after induction. The collected data were statistically analyzed for comparison.

Drug: T received propofol at a dose of 2-2.5 mg/kg based on total body weight

Group L

ACTIVE COMPARATOR

A total of 120 patients undergoing general anesthesia for urological surgeries at our hospital were included in the study. Patients were randomized into two groups (Group T/Group L). All patients were taken to the operating room, and in addition to routine monitoring, BIS and SedLine monitoring were provided. All patients received 1 mcg/kg of fentanyl. Group L received propofol at 2-2,5mg/kg dose based on lean body weight, which was calculated from CT imaging by a radiologist. Propofol was administered at a rate of 100 mg/min. The laryngeal mask will be placed once an adequate depth of anesthesia is achieved. All data were recorded at 2-minute intervals for 6 minutes before and after induction. The collected data were statistically analyzed for comparison.

Drug: Group L received propofol at 2-2,5mg/kg dose based on le

Interventions

T received propofol at a dose of 2-2.5 mg/kg based on total body weight DRUG

A total of 120 patients undergoing general anesthesia for urological surgeries at our hospital were included in the study. Patients were randomized into two groups (Group T/Group L). All patients were taken to the operating room, and in addition to routine monitoring, BIS and SedLine monitoring were provided. All patients received 1 mcg/kg of fentanyl. Group T received propofol at a dose of 2-2.5 mg/kg based on total body weight. Propofol was administered at a rate of 100 mg/min. The laryngeal mask will be placed once an adequate depth of anesthesia is achieved. All data were recorded at 2-minute intervals for 6 minutes before and after induction. The collected data were statistically analyzed for comparison.

Group T

Group L received propofol at 2-2,5mg/kg dose based on le DRUG

A total of 120 patients undergoing general anesthesia for urological surgeries at our hospital were included in the study. Patients were randomized into two groups (Group T/Group L). All patients were taken to the operating room, and in addition to routine monitoring, BIS and SedLine monitoring were provided. All patients received 1 mcg/kg of fentanyl. Group L received propofol at 2-2,5mg/kg dose based on lean body weight, which was calculated from CT imaging by a radiologist. Propofol was administered at a rate of 100 mg/min. The laryngeal mask will be placed once an adequate depth of anesthesia is achieved. All data were recorded at 2-minute intervals for 6 minutes before and after induction. The collected data were statistically analyzed for comparison

Group L

Eligibility Criteria

• Age: 18 Years - 65 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• A total of 120 patients of both genders,
• Aged 18-65 years,
• BMI \>25
• Scheduled for elective surgery under general anesthesia in the urology operating room

You may not qualify if:

• Patients under 18 years of age or over 65 years old
• Patients unable to read, understand, or sign the consent form
• Hemodynamically unstable patients
• Patients with contraindications to anesthetic drugs
• Patients who do not wish to participate in the study
• Patients deemed unsuitable by the researcher
• Patients with advanced dementia or behavioral disorders
• Patients using psychiatric medications or abusing drugs
• Patients requiring awake intubation
• Emergency surgical procedures
• Patients with more than a 5% weight change between the time of the CT scan and the surgery day
• A time gap of more than 2 months between the CT scan and the surgery day
• The criteria for discontinuing the study are as follows:
• Patients who develop anaphylaxis
• Airway failure

Sponsors & Collaborators

• Ankara City Hospital Bilkent: lead

Study Sites (1)

Ankara Bilkent City Hospital

Çankaya, Ankara, 06800, Turkey (Türkiye)

Location

Related Publications (4)

• Rusch D, Arndt C, Eberhart L, Tappert S, Nageldick D, Wulf H. Bispectral index to guide induction of anesthesia: a randomized controlled study. BMC Anesthesiol. 2018 Jun 15;18(1):66. doi: 10.1186/s12871-018-0522-8.

  PMID: 29902969 RESULT

• Pilge S, Zanner R, Schneider G, Blum J, Kreuzer M, Kochs EF. Time delay of index calculation: analysis of cerebral state, bispectral, and narcotrend indices. Anesthesiology. 2006 Mar;104(3):488-94. doi: 10.1097/00000542-200603000-00016.

  PMID: 16508396 RESULT

• Gurses E, Sungurtekin H, Tomatir E, Dogan H. Assessing propofol induction of anesthesia dose using bispectral index analysis. Anesth Analg. 2004 Jan;98(1):128-131. doi: 10.1213/01.ANE.0000090314.43496.1D.

  PMID: 14693603 RESULT

• Schmidt GN, Bischoff P, Standl T, Lankenau G, Hilbert M, Schulte Am Esch J. Comparative evaluation of Narcotrend, Bispectral Index, and classical electroencephalographic variables during induction, maintenance, and emergence of a propofol/remifentanil anesthesia. Anesth Analg. 2004 May;98(5):1346-53, table of contents. doi: 10.1213/01.ane.0000111209.44119.30.

  PMID: 15105213 RESULT

Study Officials

• Seda Kurtbeyoğlu, doctor

  Ankara City Hospital Bilkent

  STUDY CHAIR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: QUADRUPLE
• Who Masked: PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: doctor

Study Record Dates

• First Submitted: March 2, 2025
• First Posted: March 6, 2025
• Study Start: January 1, 2025
• Primary Completion: January 20, 2025
• Study Completion: January 27, 2025
• Last Updated: March 11, 2025

Record last verified: 2025-03

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)