Clinical trial · Interventional
Correlation Between Intraocular Pressure Measurement by Tomometer and Anterior Chamber Depth Measurement by Ultrasound
Correlation Between Intraocular Pressure Measurement by Tomometer and Anterior Chamber Depth Measurement by Ultrasound in Steep Trendelenberg Position During Robotic Assisted Surgery
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Why stopped (as posted): Two patients developed corneal laceration and hence study re-reviewed by IEC and decided to terminate the study prematurely
Summary
Brief summary (as posted)
Intra ocular pressure (IOP) may theoretically increase due to steep Trendelenberg position and studies showed that IOP reaches peak levels after steep Trendelenberg position on an average of 13 mmHg higher than preanesthesia induction values. Major determinants of IOP are aqueous humor flow, choroidal blood volume, central venous pressure and extra ocular muscle tone. Hassen GW et al measured anterior chamber depth in 2 patients with glaucoma and compared the anterior chamber depth (ACD) with the intraocular pressure measured by tonometer. They concluded that bedside ultrasound could be useful in evaluating patient with suspected increased IOP, who are unable to open their eyes.
Conditions
Conditions (3)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Gastrointestinal Cancer | Malignant Digestive System Neoplasm | ALIAS | 0.90 |
| Malignant Female Reproductive System Neoplasm | Malignant Female Reproductive System Neoplasm | ONTOLOGY_EXACT | 0.98 |
| Urological Cancer | — | UNRESOLVED | — |
Interventions
Interventions (2)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| Anterior chamber depth measurement by ultrasound | Device | — | UNRESOLVED |
| IOP by tonometer | Device | — | UNRESOLVED |
Design
Arms and outcomes
Arms (1)
- type
- EXPERIMENTAL
- label
- IOP by tomoneter and ultrasound
- description
- Intraocular pressure will be measured by electronic tomometer (tonopen) at different point of time after induction of anaesthesia in patients undergoing robotic assisted surgery under steep Trendelenberg position. Anterior chamber depth will be measured by ultrasound at the same time intervals.
- interventionNames
- Device: IOP by tonometer
- Device: Anterior chamber depth measurement by ultrasound
Primary outcomes (2)
- measure
- Changes in intraocular pressure measured by tonometer
- timeFrame
- Just after induction of anesthesia, every 2 hours during surgery and immediately after surgery
- description
- Intra operative recordings of IOP will be after induction and thereafter will be measured every 2 hours and at the end of surgery.
- measure
- Changes in anterior chamber depth measured by ultrasound.
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 18 Years
- Maximum age
- 70 Years
Show eligibility criteria text
Inclusion Criteria: 1. ASA class I-III 2. Urological cancer patients under going robotic assisted surgeries. 3. Gastrointestinal cancer patients under going robotic assisted surgeries, 4. Gynecological cancer patients under going robotic assisted surgeries, Exclusion Criteria: 1. ASA class IV and above 2. Patients with a history of glaucoma. 3. Patients with corneal disease, retinal vascular disease.
References
Publications (0)
Data not yet available