Association of the Optic Nerve Sheath Diameter With Eyeball Transverse Diameter in Robot-assisted Prostatectomy

H

Hacettepe University

Status

Unknown

Conditions

Optic Nerve Sheath Diameter
ONSD /ETD Ratio
Elevated Intracranial Pressure

Study type

Observational

Funder types

Other

Identifiers

NCT03691025
hacetteperobotprostat

Details and patient eligibility

About

Robot-assisted laparoscopic radical prostatectomy (RALRP) is becoming a popular procedure due to its unique advantages. Despite these advantages, pneumoperitoneum and steep trendelenburg position are associated with hemodynamic instability and elevated intracranial pressures (ICP). Ultrasonographic measurement of optic nerve sheath diameter (ONSD) is an indirect but also a generally accepted reliable and noninvasive measurement of elevated ICP. However, optimal cut-off values are highly inconsistent due to multiple factors (gender, height, weight). To eliminate the effects of these factors on the results; a ratio should be established in patients known to have elevated ICPs. In a recent study ONSD/ eyeball transverse diameter(ETD) in healthy volunteers in a specific population was established. 60 patients without any history of ICP undergoing RALRP will be enrolled to the study. Ultrasonographic measurement of ONSD and ETD will be performed 10 minutes after induction of general anesthesia, 10 minutes after CO2 pneumoperitoneum with trendelenburg positioning and measurements will be repeated hourly and at last after returning to supine position without CO2 pneumoperitoneum at the end of the procedure. Hemodynamic variables and BIS values on this specific times will be recorded and an arterial sample will be obtained.

Enrollment

60 estimated patients

Sex

Male

Ages

18 to 75 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

  • 19-75 years patients undergoing RALP

Exclusion criteria

  • a history of corneal surgery, open-angle or closed-angle glaucoma
  • intraocular surgery
  • history of elevated ICPs

Trial design

60 participants in 1 patient group

RALPD

Trial contacts and locations

0

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Central trial contact

Banu Kılıçaslan; Başak Akça

Data sourced from clinicaltrials.gov

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