Can Head Position Improve Surgical Field During Ear Surgery?

• Status: Completed
• Trial end date: 2020-10-14
• Target enrollment: 0
• Participant gender: All

Summary

Middle ear surgeries utilizes microscope in a narrow field. They are better performed under controlled hypotension, to minimize bleeding and improve surgical field visualization and hence improve results.Head-up or anti-trendelenburg position influences intraoperative bleeding by generating regional ischaemia in sites elevated above the level of the heart. Also by augmenting the effect of vasodilators through pooling of blood in dilated veins.

• Phase: N/A
• Accepts Healthy Volunteers?: Accepts Healthy Volunteers

Details

• Lead Sponsor: Ain Shams University
• Treatments: Anesthetics; Dexmedetomidine

Criteria

Inclusion Criteria:

• ASA I-II

Exclusion Criteria:

• Patients with uncontrolled hypertension, coronary artery disease or on beta blockers.

• Cerebrovascular insufficiency.

• Anaemia.

• End stage renal failure.

• Liver cirrhosis.

• Patients with coagulopathy or receiving drugs influencing blood coagulation.

• Pregnancy.

• Known sensitivity to any of the study drugs.

• Patients' refusal to participate in the study.