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Effect of Vasopressin vs Norepinephrine on Pulmonary Oxygenation and Lung Mechanics in Patients With Hypertension Therapy During One-lung Ventilation : Preliminary Study

NCT04170751 · Status: UNKNOWN · Phase: NA · Type: INTERVENTIONAL · Enrollment: 40

Last updated 2021-05-04

No results posted yet for this study

Summary

Hypotension during anesthesia often occurs because reduced systemic vascular resistance and blocked sympathetic nervous system by anesthetic drugs. In patients who are taking hypertension medication, blood pressure drops are exaggerated by inadequate compensation mechanism due to decrease of blood vessel elasticity and desensitization of baroreceptors. In one-lung ventilation (OLV) during thoracic surgery, persistent perfusion of non-ventilatory lungs can lead to increased intra-pulmonary shunt and hypoxemia. As a compensatory mechanism, the gravitational effect and hypoxic pulmonary vasoconstriction occur. Among these, hypoxic pulmonary vasoconstriction is associated with pulmonary vascular resistance. Norepinephrine and vasopressin, which are commonly used in patients with hypotension, affect systemic and pulmonary vascular resistance. However, no studies have been done on lung oxygenation and pulmonary mechanics of these vasoactive drugs in patients undergoing surgery on one lung. Therefore, the purpose of this study is to investigate the effects of vasoactive drugs, norepinephrine and vasopressin, in patients with hypertension.

Conditions

Interventions

DRUG

16 mcg / cc of norepinephrine(group N)

In group N, 16 mcg / cc of norepinephrine was infused through the central catheter. Drug titration should be 0.05 mcg / min / kg for norepinephrine and 2 units / hr for vasopressin, until target blood pressure is reached. Drug infusion rate should not exceed 0.3mcg / min / kg for norepinephrine and 10unit / hr for vasopressin for patient's safety.

DRUG

0.4 unit / cc of vasopressin(group V)

In group V, 0.4 unit / cc of vasopressin was infused through the central catheter and the respective doses recorded. Drug titration should be 0.05 mcg / min / kg for norepinephrine and 2 units / hr for vasopressin, until target blood pressure is reached. Drug infusion rate should not exceed 0.3mcg / min / kg for norepinephrine and 10unit / hr for vasopressin for patient's safety.

Sponsors & Collaborators

  • Yonsei University

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Model
PARALLEL

Eligibility

Min Age
40 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2019-11-18
Primary Completion
2021-09-30
Completion
2021-09-30

Countries

  • South Korea

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT04170751 on ClinicalTrials.gov