Cardiac function and cerebral blood flow in the beachchair surgical patient.

Not Applicable

Recruiting

• Conditions: Surgery - Surgical techniques; Intraoperative cerebral hypoperfusion; Haemodynamic state in the Beachchair position during shoulder surgery; Anaesthesiology - Anaesthetics; Stroke - Ischaemic

• Registration Number: ACTRN12610001075077
• Lead Sponsor: The Avenue Hospital

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2010-12-07
• Last Update Posted: 13 January 2020

Recruitment & Eligibility

• Status: Recruiting
• Sex: All
• Target Recruitment: 34

Inclusion Criteria

>18 years of age
Shoulder surgery suitable for beach chair position
Able to provide informed consent

Exclusion Criteria

Previous cerebrovascular event
Current cardiac disease including pacemaker Cerebrovascular disease
Significant cardiac or respiratory impairment
Contraindications to interscalene block
Inadequate understanding of English
Body Mass Index (BMI) > 35

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Cerebral blood flow in the beach chair position. Measurement of middle cerebral artery flow velocity via transcranial Doppler, and frontal lobe cerebral oxygenation by near infra-red spectroscopy.[From supine position to beach chair position];Cognitive recovery. The assessment of cognitivre recovery (early and late) following surgery involves the use of a Post Operative Quality of Recovery Scale (PQRS) questionaire.[Patients will be tested preoperatively and following surgery at 40 min, day 1, day 3, and at 3 months.]

Secondary Outcome Measures

Name	Time	Method
Changes in cardiac output. Cardiac function will be assessed by transthoracic echocardiography, with measurement of left ventricular outflow tract size and blood velocity via Doppler.[From supine position to beach chair position];Fluid and vasopressor requirements. The extra volume of crystalloid and/or colloid, and total additional phenylephrine bolus dose and/or atropine bolus dose required to treat refractory hypotension and bradycardia.[From induction to completion of anaesthetic]