New needle for paracentesis.

Area of Science:

• Ophthalmology
• Surgical Instrumentation

Background:

• Paracentesis, an intraocular procedure, carries a risk of lens injury from disposable needles.
• Current needles may penetrate too deeply, causing complications like lens damage.

Purpose of the Study:

• To introduce a new needle design for paracentesis that minimizes the risk of intraocular lens injury.
• To improve the safety and efficacy of paracentesis procedures.

Main Methods:

• Development of a paracentesis needle with an integrated locking mechanism to control depth.
• Modification of the needle tip to a lance shape to reduce corneal pressure and prevent Seidel phenomenon.
• Compatibility testing with standard tuberculin syringes and pipettes.

Main Results:

• The locking mechanism effectively prevents excessive needle penetration, thereby reducing the danger of lens injury.
• The lance-shaped tip lowers corneal puncture pressure, avoiding the Seidel phenomenon.
• The needle demonstrated superior performance in situations requiring precise control, such as pediatric paracentesis or procedures with assistants.

Conclusions:

• The newly designed paracentesis needle offers enhanced safety by mitigating lens injury risks.
• Its features make it particularly advantageous in procedures involving potential patient movement or complex manipulations.
• This innovation represents a significant improvement over traditional disposable needles for intraocular paracentesis.