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Different Intra-abdominal Pressures and Optic Nerve Size

Investigation of the Effects of Different Intra-abdominal Pressures on Optic Nerve Size Measured by Orbital USG in Patients Undergoing Major Abdominal Surgery

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT04556877
Enrollment
78
Registered
2020-09-21
Start date
2018-06-15
Completion date
2020-06-15
Last updated
2020-09-21

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

Conditions

Intraabdominal Hypertension, Major Surgery, Optic Nerve Congestion

Brief summary

In intensive care patients, high intraabdominal pressure is frequently encountered. Intra-abdominal pressure is often measured as high, especially after major abdominal surgery procedures. In recent years, various studies have reported that the increase in optic nerve diameter measured by ultrasound correlates with the level of intracranial pressure. Optic nerve diameter measurement with ultrasound is a non-invasive procedure. Intra-abdominal pressure measurements are also routinely performed in intensive care patients. In the measurement of abdominal pressure, the bladder catheter, which is already available in every patient who comes to intensive care, is used. In this study, the intra-abdominal pressure values present in the file of each patient undergoing major abdominal surgery who were taken to intensive care unit will be taken. Orbital USG will be performed on the 6th, 12th and 24th hours on admission to the intensive care unit to measure the diameter of the optic nerve, and the relationship between the intra-abdominal pressure value and optic nerve diameters will be investigated.

Detailed description

In intensive care patients, high intraabdominal pressure is frequently encountered. Intra-abdominal pressure is often measured as high, especially after major abdominal surgery procedures. This situation creates ischemia in the abdominal organs in the patient, decreases venous return as a result of inferior vena cava compression and leads to a decrease in cardiac output. In addition, intracranial pressure frequently increases as a result of the venous circulation being affected. In recent years, various studies have reported that the increase in optic nerve diameter measured by ultrasound correlates with the level of intracranial pressure. Optic nerve diameter measurement with ultrasound is a non-invasive procedure. Intra-abdominal pressure measurements are also routinely performed in intensive care patients. In the measurement of abdominal pressure, the bladder catheter, which is already available in every patient who comes to intensive care, is used. In this study, the intra-abdominal pressure values present in the file of each patient undergoing major abdominal surgery who were taken to intensive care unit will be taken. Orbital USG will be performed on the 6th, 12th and 24th hours on admission to the intensive care unit to measure the diameter of the optic nerve, and the relationship between the intra-abdominal pressure value and optic nerve diameters will be investigated.

Interventions

PROCEDUREIntraabdominal pressure and optic nerve diameters

Measuring Intraabdominal pressure with a Foley cathater and measuring optic nerve diameters with a USG

Sponsors

Trakya University
Lead SponsorOTHER

Study design

Observational model
CASE_CROSSOVER
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
18 Years to 85 Years
Healthy volunteers
No

Inclusion criteria

Having had major abdominal surgery

Exclusion criteria

1. pregnant patients 2. Patients whose bladder catheter cannot be inserted 3. Patients with diagnosed or suspected brain death

Design outcomes

Primary

MeasureTime frameDescription
optic nerve diameterwithin 2 hours of admissionmeasuring optic nerve diameter

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026