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CompletedNCT04233177Updated Jan 19, 2022

The Effect of Trendelenburg Position on CCA Blood Flow

An observational study in Perfusion and Perioperative/Postoperative Complications, sponsored by Seoul National University Hospital. Completed at 1 site in Korea, Republic of. Open to participants aged 20 Years to 70 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-01-19.

Sponsored by Seoul National University Hospital · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
20
Ages
20 Years to 70 Years
Sex
All
01

Study summary

The investigators will evaluate the change of the common carotid artery blood flow according to patient's position and penumoperitoneum.

Read the detailed description

The study will include 20 patients undergoing gynecological surgery. The common carotid artery blood flow will be measured using Doppler US during the following conditions; supine position before induction of anesthesia, supine position immediately after induction of anesthesia, supine position with penumoperitoneum, head-down position with or without pneumoperitoneum.

02

Conditions studied

  • Perfusion
  • Perioperative/Postoperative Complications

Keywords

  • Common carotid artery
  • Trendelenburg
  • Pneumoperitoneum
  • Blood flow
03

In context

Pneumoperitoneum

149 studies on the registry are indexed under Pneumoperitoneum; 29 are open to participants now.

This study's enrollment of 20 is below the median of 54 across 46 observational studies indexed under Pneumoperitoneum.

Browse Pneumoperitoneum studies →

Lead sponsor

Seoul National University Hospital is the lead sponsor of 1,860 studies on the registry; 275 are open to participants now.

Of its 12 completed or terminated interventional studies of FDA-regulated products, 2 (17%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
20 Years to 70 Years
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Probability sample

Study population

patients undergoing gynecology surgery under trendelenburg position

Inclusion criteria

  • ASA class I,II
  • patients undergoing gynecology surgery under trendelenburg position
  • Age ranges from 20 to 70

Exclusion criteria

Exclusion Criteria:

  • BMI > 32
  • Pregnancy
  • Patients who did not agree to study
  • Patients with allergies to the drugs used in this study
  • Patients with anatomical variations or lesions in cervical or cranial vascular portion
  • Patients with arrhythmia that may alter patient's cardiac output(e.g. artrial fibrillation)
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
20 participants (actual)
Patient registry
No
06

What researchers measure

Primary outcomes

  1. Change of the common carotid artery blood flow velocity

    Common carotid artery blood flow velocity is measured using Doppler US

    Time frame: 1) baseline, 2) Immediately after induction of anesthesia, 3) immediately after pneumoperitoneum, 4) immediately after Trendelenburg position with penumoperitoneum, 5) Immediately after desufflation in Trendelenburg position

Secondary outcomes

  1. Change of the common carotid artery beat volume

    Common carotid artery beat volume was calculated from median common carotid artery beat velocity and vessel diameter

    Time frame: 1) baseline, 2) Immediately after induction of anesthesia, 3) immediately after pneumoperitoneum, 4) immediately after Trendelenburg position with penumoperitoneum, 5) Immediately after desufflation in Trendelenburg position

  2. Change of the common carotid artery diameter

    Common carotid artery diameter is obtained using US

    Time frame: 1) baseline, 2) Immediately after induction of anesthesia, 3) immediately after pneumoperitoneum, 4) immediately after Trendelenburg position with penumoperitoneum, 5) Immediately after desufflation in Trendelenburg position

  3. Change of mean arterial blood pressure

    Mean arterial pressure is obtained concurrently with common carotid artery blood flow velocity measurements

    Time frame: 1) baseline, 2) Immediately after induction of anesthesia, 3) immediately after pneumoperitoneum, 4) immediately after Trendelenburg position with penumoperitoneum, 5) Immediately after desufflation in Trendelenburg position

  4. Change of cardiac output

    Cardiac output was obtained using FloTrac(EdwardLifescience, USA)

    Time frame: 1) baseline, 2) Immediately after induction of anesthesia, 3) immediately after pneumoperitoneum, 4) immediately after Trendelenburg position with penumoperitoneum, 5) Immediately after desufflation in Trendelenburg position

  5. Change of peak inspiration airway pressure

    Peak inspiratory airway pressure is obtained using the ventilator system

    Time frame: 1) baseline, 2) Immediately after induction of anesthesia, 3) immediately after pneumoperitoneum, 4) immediately after Trendelenburg position with penumoperitoneum, 5) Immediately after desufflation in Trendelenburg position

07

Study locations

1 site
  • Jin-Tae Kim
    Seoul, Korea, Republic of
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jan 19, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04233177
Lead sponsor
Seoul National University Hospital
Responsible party
Jin-Tae Kim (Professor, Seoul National University Hospital) — Principal investigator
First posted
Jan 18, 2020
Start date
Jan 13, 2020
Primary completion
Feb 23, 2021
Completion
Feb 23, 2021
Last update
Jan 19, 2022

Study contacts

Jin-Tae Kim, PhD
principal investigator · Seoul National University Hospital

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Jan 2022. You cannot join it, but the record below documents what was studied.

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