Effectiveness of Modified Ophthalmic Draping Method in Preventing Carbon Dioxide Accumulation in Patient Undergoing Eye Surgery Under Local Anesthesia

University of Malaya

Status and phase: Completed; Phase 1

Conditions: To Prevent Hypercarbia Under the Opthalmology Drape During Surgery.; To Prevent Hypothermia During Opthalmology Surgery.

Treatments: Device: forced air warmer (Bair Hugger); Device: warming blanket

Study type: Interventional

Funder types: Other

Identifiers

NCT02036034

eyedrapCO2

Details and patient eligibility

About

The investigators hypothesize that this modified ophthalmic draping will reduce the accumulation and rebreathing of carbon dioxide during eye surgery.

Full description

Majority of eye surgery has been widely done under local anesthesia provided by the ophthalmologist with or without sedation.The surgical drapes used often covers the patients face and beyond in order to maintain sterility of the surgical field. This can lead to accumulation of carbon dioxide under ophthalmic drapes due to the exhaled carbon dioxide escapes incompletely through the drapes;hence results in an increase of carbon dioxide in the ambient air surrounding the patient's head.This causes an increase in arterial carbon dioxide partial pressure and thus hyperventilation and patient discomfort with restlessness and unable to stay still during the surgery.

In recent years,several types of ophthalmic drapes have been produced.This study is look for possible difference in accumulation of carbon dioxide under the standard ophthalmic drapes compared to the modified draping.

Enrollment: 30 patients

Sex: All

Ages: 40 to 80 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• ASA physical status I,II OR III,adult aged 40 to 80 years old,scheduled to undergo elective eye surgery under local anaesthetic at UMMC will be enrolled in this study.

Exclusion criteria

• Pre-existing pulmonary disease,psychological disorders,neurological disorder and patient required sedation.

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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30 participants in 2 patient groups, including a placebo group

drape with forced air warmer

Active Comparator group

Description:

forced air warmer placed under the chin before draping, inflated after draping completed.

Treatment:

Device: forced air warmer (Bair Hugger)

drape with warming blanket

Placebo Comparator group

Description:

warming blanket placed on torso of patient under the drape.

Treatment:

Device: warming blanket