The effects of the beach chair position on cerebral haemodinamic

• Research type

  Research Study

• Full title

  The effects of the beach chair position on cerebral haemodynamic perfusion on patients undergoing shoulder surgery

• IRAS ID

  195381

• Contact name

  Chiara Robba

• Contact email

  chiara.robba@addenbrookes.nhs.uk

• Duration of Study in the UK

  1 years, 0 months, 1 days

• Research summary

  Rationale
  When anaesthetising patients for arthroscopic shoulder surgery, it is common practice to sit the patient in the beachchair position and to optimise arthroscopy by allowing relative hypotension.
  Although the beachchair position is associated with better visualization and less bleeding, it has also been associated with hypotension and consequently reduction of the flow of blood in the brain. Recent research has shown that cerebral complications following shoulder surgery performed in the beach chair position under general anesthesia arise secondary to a critical reduction of cerebral blood flow (cerebral ischemia).

  Objectives
  In this project we will aim to assess the effects of beachchair position on the blood flow of the brain during general anaesthesia for shoulder surgery by monitoring middle cerebral artery blood velocity with an ultrasound study, the Transcranial Doppler.

  Study design
  A single centre prospective observational study

  Study population
  We will include in this study patients undergoing elective shoulder surgery with beachchair position aged > 18 yrs.

  Main study parameters/endpoints
  Our aim is to assess the changes occourring in the flow of the main artery of the brain (middle cerebral artery) related to positional changes from supine to beach-chair position. Pressure and velocity waveforms will be analysed with ICM plus software.

• REC name

  London - Central Research Ethics Committee

• REC reference

  16/LO/0350

• Date of REC Opinion

  20 May 2016

• REC opinion

  Further Information Favourable Opinion