Burr Hole Ultrasound Study

Study Overview
=================
Brief Summary
-----------------
Chronic subdural hematoma (CSDH) is commonly managed through burr hole evacuation. This study evaluates the feasibility of trans burr hole sonography as an alternative postoperative imaging modality. A pilot study on 20 patients who underwent burr hole surgery for CSDH was therefore planned. Postoperative imaging included both CT and sonographic examinations through the burr hole. We assessed the ability to measure residual subdural fluid thickness sonographically compared to CT.

Official Title
-----------------
Evaluation of the Feasibility of Measuring Chronic Subdural Hematoma Thickness Via Trans-burrhole Ultrasound

Conditions
-----------------
Chronic Subdural Hematoma

Intervention / Treatment
-----------------
* Diagnostic Test: Trans-burr hole ultrasound


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Burr hole surgery due to chronic subdural hematoma Routine performance of an computed tomography scan within 3-7 days postoperative Ability to give informed consent Exclusion Criteria: Performance of prior craniotomy Performance of prior revision surgery

Ages Eligible for Study
-----------------
Minimum Age: 18 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Diagnostic
Intervention Model: Single Group Assignment
Interventional Model Description: 1 Group of 20 patients who all underwent the same examination
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Burr hole sonography<br>Patients within this arm (only arm of the study) undergo burr hole sonography | Diagnostic Test: Trans-burr hole ultrasound<br>* All ultrasound examinations were conducted alongside the routine postoperative CT scan between 3-7 days postoperatively. To minimize potential influences of the patient's head position on the distribution and thickness of the subdural fluid, we first carried out the CT scan with the patient and their head in a supine position. Immediately after the CT scan, the patient remained on the same examination bed, and burr hole ultrasound was performed in the identical supine position. The burr hole was centered in the image, with the outer table surrounding the burr hole displayed as a horizontal line. The content of the burr hole could be differentiated by its higher echogenicity from the subdural residual hematoma or residual fluid. The brain's surface and overlying leptomeninges, however, displayed higher echogenicity compared to the subdural fluid. The subdural hematoma's thickness was measured at its maximum extent.<br>* Other names: burr hole ultrasound;|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| cSDH thickness | maximum extent of the hematoma (chronic subdural hematoma, CSDH) thickness under the burr hole in axial and coronal plane | 1 measurement on day 3-7 postoperative | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
Burr hole, Ultrasound, Trans-burr hole, TBUS, Sonography, Chronic Subdural hematoma