Using ultrasound to monitor brain pressure during sinus surgery

Evaluation of intracranial pressure during functional endoscopic sinus surgery using ultrasound measurement of the optic nerve sheath diameter

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

ISRCTN

Registry ID

ISRCTN93785923

Enrollment

100

Registered

2025-07-16

Start date

2024-09-01

Completion date

Unknown

Last updated

2025-09-08

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

Conditions

Observation of optic nerve sheath diameter as an indirect, non-invasive measurement of elevated intracranial pressure during functional endoscopic sinus surgery. Surgery

Interventions

The patients were thoroughly informed about the study by the principal investigator or collaborators in the preoperative room during preparation for the surgical procedure. If the patients decided to

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Aged 18 years and over 2 All genders 3. Scheduled for elective functional endoscopic sinus surgery (FESS) 4. Have given their consent to participate

Exclusion criteria

Exclusion criteria: 1. Individuals younger than 18 and older than 90 years 2. Patients with orbital diseases, such as glaucoma, cataracts 3. Conditions resulting from acute or chronic eye trauma 4. Those who have not given their consent to participate

Design outcomes

Primary

Measure	Time frame
Intracranial pressure measured using data collected from an electronic database of ultrasound images at four time periods during the surgery, which are before the induction of general anesthesia, immediately after the induction of general anesthesia/before the start of the surgical procedure, at the end of the surgical procedure and after waking from general anesthesia, before discharge to the recovery room	—

Measure

Time frame

Intracranial pressure measured using data collected from an electronic database of ultrasound images at four time periods during the surgery, which are before the induction of general anesthesia, immediately after the induction of general anesthesia/before the start of the surgical procedure, at the end of the surgical procedure and after waking from general anesthesia, before discharge to the recovery room

—

Secondary

Measure	Time frame
1. Optic nerve sheath diameter (ONSD) measured using data collected from an electronic database of ultrasound images at four time periods during the surgery, which are before the induction of general anesthesia, immediately after the induction of general anesthesia/before the start of the surgical procedure, at the end of the surgical procedure and after waking from general anesthesia, before discharge to the recovery room 2. Demographic data (age, gender, body mass index) were measured using data obtained from patients' preoperative anesthesia assessment (electronic database), at one timepoint 3. Comorbidities measured using the ASA physical status classification system from data obtained from patients' preoperative anesthesia assessment (electronic database), at one timepoint 4. The duration of the surgical procedure (minutes) was measured using patient medical records (anesthesia charts) at the end of the surgery (obtained in the recovery room). 5. The amount of saline solution used for irrigation during the procedure (ml) was measured using patient medical records(surgical list) at the end of the surgery (obtained in the operative theatre, before patients' discharge to the recovery room) 6. Hemodynamic parameters: systolic arterial pressure (SAP), diastolic arterial pressure (DAP), mean arterial pressure (MAP) and heart rate (HR), were measured using patient medical records (anesthesia charts) at the time of measuring ONSD	—

Measure

Time frame

1. Optic nerve sheath diameter (ONSD) measured using data collected from an electronic database of ultrasound images at four time periods during the surgery, which are before the induction of general anesthesia, immediately after the induction of general anesthesia/before the start of the surgical procedure, at the end of the surgical procedure and after waking from general anesthesia, before discharge to the recovery room 2. Demographic data (age, gender, body mass index) were measured using data obtained from patients' preoperative anesthesia assessment (electronic database), at one timepoint 3. Comorbidities measured using the ASA physical status classification system from data obtained from patients' preoperative anesthesia assessment (electronic database), at one timepoint 4. The duration of the surgical procedure (minutes) was measured using patient medical records (anesthesia charts) at the end of the surgery (obtained in the recovery room). 5. The amount of saline solution used for irrigation during the procedure (ml) was measured using patient medical records(surgical list) at the end of the surgery (obtained in the operative theatre, before patients' discharge to the recovery room) 6. Hemodynamic parameters: systolic arterial pressure (SAP), diastolic arterial pressure (DAP), mean arterial pressure (MAP) and heart rate (HR), were measured using patient medical records (anesthesia charts) at the time of measuring ONSD

—

Countries

Croatia

Contacts

Public ContactKatarina;Katarina Tomulic Brusich;Tomulic Brusich

;

katarinatb@medri.uniri.hr;ktomulic@gmail.com+385994888256;-

Outcome results

None listed

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