Waterjet dissection in pediatric cranioplasty

Area of Science:

• Neurosurgery
• Surgical Technology

Background:

• Cranioplasty often involves difficult separation of adhered subcutaneous tissue and dura mater after decompressive craniotomy.
• Existing methods may struggle with tissue adherence, increasing surgical complexity and risk.

Purpose of the Study:

• To evaluate the safety and efficacy of waterjet dissection for separating galea and dura mater in pediatric cranioplasty.
• To assess the potential advantages and drawbacks of the waterjet technique in this specific surgical context.

Main Methods:

• In vitro testing of waterjet effect on human dura mater and dural repair substitutes up to 80 bar.
• Clinical application in 8 pediatric patients undergoing cranioplasty, using waterjet dissection between galea and dura at pressures up to 50 bar.

Main Results:

• In vitro studies showed high resistance of dura and substitutes to waterjet dissection, with perforation occurring at higher pressures (55-60 bar).
• Clinically, waterjet dissection effectively separated galea and dura with minimal bleeding (<60 ml in 7/8 patients), requiring no blood transfusions.
• No dural tears or complications occurred, demonstrating the technique's safety in pediatric cranioplasty.

Conclusions:

• Waterjet separation of dura mater, dural substitutes, and galea is a safe technique in cranioplasty, effectively preventing dural tears.
• The waterjet dissection promotes reliable hemostasis by stretching tissue layers, leading to reduced surgical blood loss.
• Further studies are warranted to confirm the benefits of waterjet dissection in reducing surgical blood loss.