Safety Needle Device with Guide Sleeve for Subcutaneous Port Puncture
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Solution Overview
Problem
Existing safety needle devices for puncturing subcutaneously implanted ports in humans or animals are cumbersome, painful, and pose a risk of needlestick injuries due to their complex structures and high overall height, which makes them unsuitable for long-term use.
Innovation Solution
A safety needle device with a first housing and a hollow needle having sections perpendicular and parallel to the body surface, a movable cover with a guide sleeve for the needle, and a flexible restraining member that limits movement, allowing for easy insertion and removal with minimal pain and reduced risk of injury, featuring a low overall height and a spring-loaded closure mechanism to secure the needle tip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex safety mechanism with multiple moving parts is used to protect the needle tip, then the reliability of needlestick injury prevention is improved, but the device complexity increases and the overall height becomes excessive
Solution Approach 1:
The needle is divided into two subsections: a first subsection (needle tip) for puncturing the port, and a second subsection for connection to the housing. This segmentation allows the protective cover to specifically enclose only the needle tip portion, simplifying the overall protective mechanism while maintaining safety effectiveness.
Solution Approach 2:
The protective cover is designed to slide over and enclose the needle tip subsection, with the needle nested within the cover during storage and transport. This nested arrangement provides automatic protection without requiring complex additional mechanisms, reducing device complexity while ensuring reliability.
2Reliability
If a tall safety mechanism is used to ensure proper needle retraction and coverage, then the reliability of needle protection is improved, but the overall device height increases making it unsuitable for long-term use
Solution Approach 1:
The protective cover is designed to be movable relative to the housing, sliding along the puncture axis to enclose the needle tip during retraction. This dynamic mechanism allows the cover to provide full protection when needed while maintaining a compact profile during use, avoiding excessive device height.
Solution Approach 2:
The protective cover is designed as a slender, elongated structure that can flexibly slide over the needle tip. This flexible shell design provides adequate protection without requiring excessive height, allowing the device to maintain a compact form factor suitable for long-term implantation.
3Ease of operation
If manual replacement of the protective cover is required after needle insertion, then the ease of operation during initial use is improved, but the risk of needlestick injury during cover replacement increases
Solution Approach 1:
The protective cover is pre-positioned to enclose the needle tip before the needle is inserted into the port. The cover remains in place during the entire procedure and is only removed after the needle is fully retracted, eliminating the need for manual cover replacement during critical operations and preventing needlestick injuries during cover handling.
Solution Approach 2:
The device design allows the protective cover to remain attached to the housing and automatically follow the needle during retraction, providing continuous protection without requiring manual intervention. The cover system serves itself by maintaining its protective position throughout the procedure, eliminating harmful manual handling steps.
4Reliability
If the needle housing is secured to the skin with adhesive bandage to prevent needle movement, then the reliability of preventing unintended needle motion is improved, but the ease of removal decreases and may cause patient discomfort
Solution Approach 1:
The protective cover is designed to be separable from the housing, allowing it to be removed or left behind independently. During needle retraction, the cover can be detached from the housing and left on the patient's skin, while the housing is removed. This extraction approach maintains needle stability during use but simplifies removal procedures and reduces patient discomfort.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a safety needle device 1, particularly for the puncture of a port implanted subcutaneously in a human or animal body, comprising a first housing 2; a hollow needle 3, wherein the needle 3 has a first sub-section 4 and a second sub-section 5, and the first sub-section 4 extends along a puncture axis, which runs at a right angle to the surface of the human or animal body, and the second sub-section 5, the needle 3 being arranged at a right angle to the first sub-section 4, substantially parallel to the surface of the human or animal body, wherein the hollow needle 3 is or can be connected to the first housing 2, particularly in the region of the second sub-section 5; a cover 6 comprising a through-hole 7 for receiving the first sub-section 4 of the needle 3, wherein the cover 6 can be moved from a first position into a second position relative to the first housing 2, wherein the movement occurs substantially along the puncture axis; and an at least partially flexible limiting element 8 for limiting the relative movement between the first housing 2 and the cover 6 in the second position; wherein the device is characterised in that the cover 6 has, on the surface facing away from the human or animal body, a guide sleeve 9 for the first sub-section 4 of the needle 3.