Hammer Drill Attachment for Curved Bone Fixation
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Solution Overview
Problem
Current surgical methods for fixing pelvic fractures using external fixators require prolonged use and high blood loss, while internal anchors face challenges with inadequate fixation due to the ring-shaped structure of pelvic bones, necessitating the development of tools that can create curved holes for curved anchors.
Innovation Solution
A hammer drill attachment for a bi-directional surgical drill, which includes a quick-release mechanism and transmission mechanism, allowing the drill to convert rotary motion into hammering action to drive modified drill wires into bone, forming curved holes for curved anchors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a straight intramedullary screw is placed along a curved path, then the screw is less invasive, but the fixation may be inadequate because the straight screw cannot be implanted very far into a curved bone
Solution Approach 1:
The patent applies curvature by using a flexible wire with a bent tip instead of a straight screw. The wire can follow the curved anatomy of pelvic bones, allowing deep implantation while maintaining a minimally invasive approach. The curved tip enables the wire to navigate complex bone geometries and achieve adequate fixation depth without requiring large incisions or extensive soft tissue disruption.
2Adaptability or versatility
If multiple tools are used (surgical drill and hammering device) to drive modified drill wires into bone, then curved holes can be formed, but the device complexity and number of tools increases
Solution Approach 1:
The patent combines the surgical drill and hammering device into a single integrated tool. The drill bit includes both cutting edges for drilling and a hammering mechanism for driving the wire into bone. This unified tool eliminates the need for separate hammering devices and reduces the number of tool changes required during the procedure, while maintaining the capability to form curved holes through coordinated rotation and hammering actions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and minimally invasive fixation of curved bone portions by allowing the drill to create curved holes, reducing the need for multiple tools and minimizing blood loss, thereby improving surgical efficiency and patient safety.
Implementation Method 1
a return spring disposed on an exterior surface of the socket seater
Implementation Method 2
a transmission mechanism configured to engage a distal end of the lengthwise adapter
Data Source
AI summary
A hammer drill attachment is provided for attachment to a bi-directional surgical drill. The attachment comprises a lengthwise adapter to engage a chuck of the surgical drill, a transmission mechanism, and a quick-release mechanism. The transmission mechanism comprises a pair of toothed plates, the teeth of a proximal plate configured to permit engagement with the teeth of a distal plate. When the proximal plate rotates in a first direction, the proximal plate transmits a rotational motion to the distal plate. When the proximal plate rotates in a second direction, the proximal plate transmits an axial percussive force to the distal plate. The quick-release mechanism comprises a socket to receive a collet, a socket seater, and a latching arm to move the socket seater with respect to the socket, thereby seating or unseating the collet in the socket.