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Changes in optic nerve sheath diameter and intraocular pressure of both eyes during prone position surgeries

Changes in Optic Nerve Sheath Diameter and Intraocular Pressure as a surrogative marker of postoperative visual loss in patients undergoing surgery in prone position – Prospective Observational study

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
CTRI
Registry ID
CTRI/2022/02/040672
Enrollment
47
Registered
2022-02-28
Start date
Unknown
Completion date
Unknown
Last updated
2024-03-04

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

Conditions

Health Condition 1: M95-M95- Other disorders of the musculoskeletal system and connective tissue Health Condition 2: N20-N23- Urolithiasis

Interventions

None listed

Sponsors

Melmaruvathur Adhiparasakthi Institute of medical sciences and research
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: American Society of Anesthesiologists (ASA) physical status I , II

Exclusion criteria

Exclusion criteria: a. Patient refusal b. Pre-existing eye disease (diabetic retinopathy, corneal opacity, glaucoma and retinal detachment), c. History of eye and neck surgery, d. Trauma patients, e. Haemoglobin = 10g/dl, f. Blood Loss = 1000ml, g. Age > 60 years, h. BMI = 40, i. American Society of Anaesthesia (ASA) physical status III and above, j. Severe anaphylactic allergy to ultrasound gel.

Design outcomes

Primary

MeasureTime frame
Theprimary outcome of the study is to investigate the influence of prone position on ONSD of both eyes in patients undergoing surgery under prone position.Timepoint: ONSD of both eyes will measured during Patient awake in supine position before induction of anaesthesia (T0) 2. Ten minutes after induction of anesthesia and in supine position (T1) 3. Ten minutes into acquiring prone position (T2) 4. At the end of the operation in prone position (T3) 5. Ten minutes into acquiring supine position before the reversal injection and the change in depth of anesthesia (T4)—

Secondary

MeasureTime frame
1. To investigate the influence of prone position on IOP of both eyes in patients undergoing surgery under prone position. 2. To find out the influence of age, sex, Body Mass Index (BMI), Peak Inspiratory Pressure (PIP), Mean Arterial Blood Pressure (MAP), Duration of surgery, End Tidal Isoflurane and ETCO2 on IOP and ONSD of both eyes during prone position Timepoint: 1.Ten minutes into acquiring prone position (T2) 2. At the end of the operation in prone position (T3)—

Countries

India

Contacts

Public ContactDr A Vinothkumar

Melmaruvathur Adhiparassakthi Institute of Medical Sciences and research

vkmaestroz@gmail.com8807327384

Outcome results

None listed

Source: CTRI (via WHO ICTRP) · Data processed: Feb 4, 2026