Curved Puncture Needle for Urinary Incontinence Sling Placement
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Solution Overview
Problem
Current surgical methods for treating urinary incontinence, such as incising the vagina to indwell a sling, are invasive, risk infection, and can damage the urethra or operator's finger, with significant burden on the patient and potential complications like urethral damage.
Innovation Solution
A puncture device with a curved, turnable needle and insertion member, capable of inclining the needle tip to avoid interference with vaginal insertion, forming a stable puncture hole for implant placement between the urethra and vagina, reducing invasiveness and risk of complications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the vagina is incised to indwell the sling, then the sling can be placed into the body, but the patient is exposed to infection risk and the invasion is relatively significant
Solution Approach 1:
The device separates the puncture function (needle) from the implant delivery function (catheter), allowing the needle to create a channel through puncture rather than incision, and the catheter to deliver the implant through that channel, avoiding direct vaginal incision
Solution Approach 2:
The puncture needle acts as an intermediary tool to create a passage through the tissue between urethra and vagina, allowing the implant to be delivered through this puncture channel rather than requiring direct incision into the vagina
2Ease of manufacture
If the vagina is incised, then the sling can be indwelled, but the operator's finger may be damaged and the invasion is significant
Solution Approach 1:
The device extracts the dangerous incision step from the procedure, replacing it with a controlled puncture through the needle that can be performed without direct finger insertion into the vagina, thereby protecting the operator's finger
Solution Approach 2:
The puncture needle serves as an intermediary instrument that allows the operator to create the necessary passage without direct manual manipulation inside the vagina, reducing the risk of finger injury
3Manufacturing precision
If the puncture needle is turned to puncture the living body, then the needle tip can form a puncture hole, but the needle tip may interfere with the vaginal insertion member
Solution Approach 1:
The device introduces spatial separation by allowing the puncture needle to operate in a different plane or dimension relative to the vaginal insertion member, enabling the needle to turn and puncture without interfering with the insertion member positioned in the vagina
Solution Approach 2:
The supporting member acts as an intermediary structure that coordinates the movement and positioning of the puncture needle relative to the vaginal insertion member, ensuring they do not interfere with each other during the procedure
Data Source
AI summary
A puncture device is disclosed, which can include a puncture needle curved in an arc, turnably supported around an axis (J1) as a turning center, and having a needle tip which punctures a living body when the puncture needle is turned; a urethral insertion member having a urethral insertion portion of a linear shape which is inserted into the urethra; and a frame capable of connecting the puncture needle and the urethral insertion member to each other, the frame turnably supporting the puncture needle. When the puncture needle is turned, the needle tip of the puncture needle has a locus (plane f9), which is inclined by an inclination angle (θ2) of 20 to 60 degrees with respect to a plane (f2) orthogonal to the urethral insertion portion.