Related Experiment Video
Updated: Oct 19, 2025

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
Published on: June 18, 2021
Use of Automated Irrigating Drainage System in Six Patients With Chronic Subdural Hematoma: A Single-Center
Jordan Davies1, Alexander S Himstead1, Ji Hyun Kim2
1Department of Neurological Surgery, University of California Irvine, Irvine, USA.
Insights
This study shows an irrigating drainage system effectively treated chronic subdural hematoma (cSDH) in six patients, with no recurrences observed. This neurosurgical technique appears safe and promising for cSDH management.
Area of Science:
- Neurosurgery
- Medical Devices
- Clinical Outcomes
Background:
- Chronic subdural hematoma (cSDH) is a growing neurosurgical concern, projected to be the most common intracranial condition by 2030.
- Recurrence rates for cSDH range from 5-15%, with surgical drains potentially reducing this risk.
Purpose of the Study:
- To evaluate the safety and efficacy of an irrigating drainage system for chronic subdural hematoma evacuation.
- To present the largest single-institution experience in the US with this specific neurosurgical device.
Main Methods:
- Retrospective review of six patients undergoing cSDH evacuation with an irrigating surgical drain.
- Analysis of device settings, duration of drainage, postoperative length of stay, neurological status, and hematoma recurrence.
Main Results:
- No cSDH recurrences were observed in the study group over an average follow-up of three months.
- Patients experienced an average postoperative length of stay of 2.67 days.
- Significant reductions in hematoma size (13.43mm) and midline shift (5.71mm) were noted by postoperative day one, with no device-related complications.
Conclusions:
- The irrigating drainage device demonstrated safety and effectiveness in this preliminary cohort of cSDH patients.
- The positive outcomes suggest further investigation and protocol development are warranted to compare this technique against standard treatments.
Abstract:
Background Chronic subdural hematoma (cSDH) is predicted to become the most common intracranial neurosurgical condition by 2030. Recurrence is estimated between 5-15%, and the use of a surgical drain is associated with lower recurrence rates. The authors present their experience with six patients undergoing cSDH evacuation with an irrigating drainage system, comprising the largest single-institution group in the United States (US). Methods IRB-approved, retrospective chart review was performed for six patients who underwent irrigating surgical drain placement during cSDH evacuation. Outcome measures included device settings and duration of the irrigating drain, postoperative length of stay, neurological status at follow-up, and hematoma recurrence. Results There were no recurrences noted within this group at last follow-up, with an average follow-up length over three months. The average postoperative length of stay was 2.67 ± 0.51 days. Patients were drained on average for 1.41 ± 0.49 days at 0cm water, irrigating at 55.25 ± 46.44cc/hr. On postoperative day one, average hematoma size and midline shift (MLS) reduction were respectively 13.43 ± 3.31mm and 5.71 ± 1.33mm. No device-related complications were noted. Conclusion The authors' early experience with this irrigating drainage device demonstrates that it is safe and effective for this population. Although this is a preliminary study on a small sample size, the excellent results warrant further investigation and establishment of a standard protocol to compare against current treatment regimens.

