spinal anesthesia decreases ocular pressure in patients with leg surgery

The Effects Of Tourniquet On Intraocular Pressure During Lower Extremity Surgery Under Spinal Anesthesia

Status

Completed

Phases

Unknown

Study type

Observational

Source

ANZCTR

Registry ID

ACTRN12617000676314

Enrollment

Registered

2017-05-11

Start date

2013-01-01

Completion date

2013-04-01

Last updated

2017-05-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Brief summary

Background: There are many factors which may effect intraocular pressure.Tourniquet, which is used in extremity surgery, also effect intraoculary pressure.There many studies about the effect of tourniquet on intraocular pressure, that were performed in patients went on general anesthesia.There was no study about the effect of tourniquet on intraoculary pressure that was performed in patients who go on spinal anethesia. Material and methods : Intraocular pressure was measured on patients who went on lower extremity surgery with or without tourniquet under spinal anesthesia.Measurements were performed before spinal anethesia, 5 minutes after spinal anethesia, 5 minutes after surgery started and at the end of the surgery.All measurements were performed in the supine position.Mean arterial blood pressure, heart rate, intraocular pressure and bleeding volumes were recorded. Results: In both groups, 5 minutes after spinal anesthesia intraocular pressure measurements were lower than the baseline intraocular pressure measurements.However, the measurements which were performed after tourniquet insufflation were higher than the baseline. Conclusion:Intraocular pressure decreases in patient who went on spinal anesthesia but, tourquet insufflation increases intraocular pressure also in patients who went lower extremity surgery with tourniquet.

Interventions

measurement of intraocular pressure in patients who went on lower extremity surgery under spinal anesthesia (with or without tourniquet),Tuorniquet were used in 30 patients and were not used in other 30 patients.Participants observed once immediately prior to anaesthesia, and again 3 different times during surgery and at the end of surgery.The use of tourniquet was decided by surgeon.

Eligibility

Sex/Gender

All

Age

18 Years to 65 Years

Healthy volunteers

Inclusion criteria

After approval by Ethics Committee and written informed consent from the patients, ASA physical status I-II patients Aged 18-65 years Elective lower extremity surgery were included in the study patients who were operated under spinal anesthesia

Exclusion criteria

Chronic diseases except regular hypertension Known allergies to any anesthetic drugs used in the study Eye disease or surgery in the medical history Any contrendications for spinal anesthesia Estimated tourniquet time more 120 min

Outcome results