Laser-drilled cardiovascular surgical needles.

Area of Science:

• Biomedical Engineering
• Surgical Technology
• Materials Science

Background:

• Swaged sutures, where surgical needles are directly attached to suture strands, are crucial in cardiovascular procedures.
• Traditional methods for attaching sutures involve creating a channel or receptacle in the needle, which can create surface irregularities.
• These irregularities, like the linear slit in channel swages, may impede needle passage through tissues.

Purpose of the Study:

• To evaluate the performance of laser-drilled holes for swaged sutures in cardiovascular needles.
• To compare the drag forces experienced by laser-swaged needles versus traditional channel-swaged needles.
• To assess the suitability of laser technology for producing suture attachments in small-diameter needles.

Main Methods:

• Developed a standardized, reproducible test to quantify the force required for needle passage through a synthetic vascular membrane.
• Produced cardiovascular needles with suture attachments using both laser drilling and conventional channel swaging techniques.
• Measured and compared the drag forces encountered by needles swaged using both methods.

Main Results:

• Laser-produced holes resulted in a smooth outer circumference on the needle end.
• Channel swages exhibited a linear slit, interrupting the needle's smooth outer circumference.
• Needles with laser-produced swages encountered significantly lower drag forces compared to channel-swaged needles.

Conclusions:

• Laser technology offers a superior method for creating suture attachments in cardiovascular needles.
• The smooth surface created by laser drilling reduces drag forces, potentially improving surgical performance.
• Laser swaging represents a significant advancement over traditional channel swaging for cardiovascular needles.