Prediction of Hypotension During Beach Chair Position Using Pleth Variability Index

Chung-Ang University Hosptial, Chung-Ang University College of Medicine

Status: Unknown

Conditions: Hypotension

Treatments: Device: Pleth

Study type: Observational

Funder types: Other

Identifiers

NCT02527538

C2013209(1169)

Details and patient eligibility

About

The beach chair position for shoulder operation induces hypotension during general anesthesia. Hypotension is induced by decreased preload and contractility due to anesthesia. Masimo is a pulse oximetry which shows pleth variability index noninvasively. The pleth variability may predict the hypotension during beach chair position.

Full description

The beach chair position for shoulder operation induces hypotension during general anesthesia. Hypotension is induced by decreased preload and contractility due to anesthesia. Masimo is a pulse oximetry which shows pleth variability index noninvasively. The investigators put the masimo probe before general anesthesia and recorded the values before and after beach chair position, The values include arterial pressure, heart rate, blood pressure, perfusion index, pleth variability index.

The primary end point was the predictive value and threshold or pleth variability index for hypotension induced by the beach chair position. The occurrence of hypotension was counted by using vasopressor. The use of vasopressor was performed when mean blood pressure less than 65 mmHg or 20% of baseline.

The investigators planned to recruit 57 patients.

Enrollment: 57 estimated patients

Sex: All

Ages: 20 to 70 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• elective shoulder surgery under general anesthesia

Exclusion criteria

• right heart failure
• morbid obesity (BMI > 30)
• arrhythmia on preoperative electrocardiography
• pulmonary hypertension
• peripheral vascular disease or pulmonary disease
• pregnant

Trial design

57 participants in 1 patient group

Pleth

Description:

The masimo probe is attached on the index fingertip and cover with black cover in all patients. Record the pleth variability index and blood pressure

Treatment:

Device: Pleth