Effect of Systemic Oxygen on Corneal Epithelial Wound Healing in Diabetic Patients Undergoing Pars Plana Vitrectomy

Study Overview
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Brief Summary
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To compare the corneal epithelial defect healing time between diabetic patients receiving and not receiving supplementary oxygen after vitrectomy. To determine whether factors such as age, duration of diabetes, duration of surgery and level of glycemic control have any influence on corneal epithelial wound healing time in diabetic patients receiving and not receiving supplementary oxygen post-vitrectomy.

Detailed Description
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This study aims to determine whether systemic oxygen therapy delivered through face mask would have beneficial effects on the healing of corneal epithelial wound in post-vitrectomy diabetic patients. It will be a prospective, randomised interventional clinical study conducted on diabetic patients indicated for vitrectomy. Rationale of this study is to see if systemic oxygen delivered via face mask will hasten the resolution of corneal epithelial defects, which may either be iatrogenic (surgically-induced intra-operatively to enable clearer visualisation for the surgeon) or spontaneous (due to corneal epithelial fragility which is commoner in diabetics)

Official Title
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Effect of Systemic Oxygen on Corneal Epithelial Wound Healing in Diabetic Patients Undergoing Pars Plana Vitrectomy

Conditions
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Corneal Diseases

Intervention / Treatment
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* Drug: Dexamethasone 0.1%, Neomycin Sulfate and Polymyxin B Sulfate topical eye drops four times daily
* Drug: Homatropine 2% eye drops thrice daily
* Drug: Oxygen gas


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: diabetic patients aged 18 years and above planned for pars plana vitrectomy that required intra-operative corneal epithelial debridement to allow better surgical visualisation of the fundus were recruited within the study duration Exclusion Criteria: pre-existing ocular surface or corneal disease, recent eye surgery within one month from the vitrectomy, glaucoma and if the patients have any contraindications to oxygen therapy (e.g. chronic obstructive pulmonary disease).

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Standard Group<br>topical Maxitrol™ six-hourly and homatropine 2% six-hourly | Drug: Dexamethasone 0.1%, Neomycin Sulfate and Polymyxin B Sulfate topical eye drops four times daily<br> <br> * Other names: Maxitrol;Drug: Homatropine 2% eye drops thrice daily<br> <br> |
| Experimental: Oxygen Group<br>standard medical treatment of topical Maxitrol™ six-hourly and homatropine 2% six-hourly, plus systemic oxygen via simple face mask at 10 litres/min for one hour, in 12-hourly sessions for 3 days | Drug: Dexamethasone 0.1%, Neomycin Sulfate and Polymyxin B Sulfate topical eye drops four times daily<br> <br> * Other names: Maxitrol;Drug: Homatropine 2% eye drops thrice daily<br> <br> Drug: Oxygen gas<br> <br> |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Mean corneal epithelial wound healing time (in days) |  | 1 to 7 days | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Age of subject as a factor influencing wound healing time |  | 1-7 days | 
| Glycemic control of subject (measured by glycated hemoglobin, HbA1c) |  | 1-7 days | 
| Duration of surgery and its influence on wound healing time |  | 1-7 days | 
| Duration of diabetes mellitus (measured in years) and its influence on wound healing time |  | 1-7 days | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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epithelium, cornea, diabetes, vitrectomy, oxygen