Intra Ocular Hypertension Clinical Trial
Official title:
A Prospective, Randomized and Double Blind Study on The Effect of Two Different Artificial Respiration Methods on the Intraocular Pressure During Surgery Under General Anesthesia
The purpose of this study is to examine whether the intraocular pressure of operated people
under general anesthesia is affected by the artificial respiration method. If it is proven
that there is such influence, the findings may lead to select the best method for patients
with increased intraocular pressure.
In this study, the investigators will monitor the changes observed in intraocular pressure
caused during an operation in two different artificial respiration methods:
1. Intermittent positive pressure ventilation (IPPV)
2. High frequency jet ventilation (HFJV)
Study recruited 50 patients aged 18 - 40, candidates to elective orthopedic surgery in the
limbs. These patients do not suffer from general diseases that restrict their daily
functioning.
The selection of the type of surgery was done to prevent the involvement of any other
factor, except the respiration method, determination of intraocular pressure.
Exclusion Criteria:
- Patients who are unable to provide an Informed Consent
- Patients suffering from any eye disease
- Patients with corneal thickness less than 450 microns or more than 600 microns
- Smokers
- Patients with pulmonary disease restrictive or obstructive
- Patients using bronchodilator
All patients operated under general anesthesia using total intravenous anesthesia )TIVA)
method.
All patients will be resuscitating half of the time of surgery using IPPV, and in the second
half of surgery using HFJV.
During the surgery the IOP will be measured by an ophthalmologist who is unaware of the
respiration method.
Correction will be made to the intraocular pressure values, depending on the thickness of
the cornea.
The results of the measurements will be collected and the clinical significance will be
reviewed by acceptable statistical methods.
n/a
Time Perspective: Prospective