Jamshidi Needle Set with Internal Sensors for Position Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing surgical needle sets, such as Jamshidi needles, face issues with external sensors or transmitters that protrude and cause irritation, potential detachment, and inability to accurately identify the instrument type during navigation-assisted surgeries, leading to incorrect positioning of the distal end.
Innovation Solution
A surgical needle set design featuring a hollow needle and obturator with internal sensors and angled adapter parts, allowing for precise detection of the instrument type and position using electromagnetic navigation, ensuring accurate positioning and orientation of the distal end.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an external sensor or transmitter is attached to the proximal end of the Jamshidi needle, then the position of the distal end can be determined, but the external part protrudes and causes irritation to the surgeon and may detach or shift during operation
Solution Approach 1:
The sensor unit is inserted into the hollow space of the obturator, nesting the sensing components within the existing instrument structure. This eliminates external protrusions that irritate the surgeon while maintaining position determination capability through the integrated sensor arrangement.
Solution Approach 2:
The sensor unit is combined with the obturator by inserting it into the hollow space and securing it with the adapter part. This merging integrates the positioning function directly into the instrument, eliminating separate external attachments and improving both comfort and reliability.
2Measurement precision
If an external sensor or transmitter is attached to the proximal end of the Jamshidi needle, then the position can be tracked, but the attachment may fall off or shift relative to the instrument, compromising position identification
Solution Approach 1:
The sensor unit is nested within the hollow space of the obturator, providing internal support and protection. This nesting prevents detachment and shifting by incorporating the sensor within the instrument's own structure rather than attaching it externally.
Solution Approach 2:
The adapter part is designed to secure the sensor unit in advance before the surgical procedure begins. The adapter engages with the hollow space and fixedly connects the sensor, preventing any subsequent movement or detachment during the operation.
3Measurement precision
If a sensor element is fixedly arranged on the instrument, then the position of the distal end can be determined, but the type of instrument cannot be identified before introduction into the patient
Solution Approach 1:
The adapter part is designed with an asymmetric angular orientation (e.g., 45 degrees) relative to the longitudinal axis of the obturator. This asymmetric configuration creates a unique geometric signature that allows the navigation system to identify the specific instrument type before introduction, while the sensor remains fixed for accurate position determination.
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 automatic detection and display of the surgical instrument type on a navigation system monitor, reducing surgeon irritation and improving positional accuracy during operations.
Implementation Method 1
In electromagnetic navigation, an inhomogeneous electromagnetic field is generated by a field generator, which field is detected by one or more sensors, as a result of which the position and orientation of the instrument or surgical tool, in particular the distal end thereof, can be directly or indirectly detected
Data Source
AI summary
In particular for automatically determining the position of a Jamshidi needle, the invention provides a surgical needle set comprising a hollow needle and an obturator, wherein the obturator has, starting a finite distance from its distal tip, a hollow space extending longitudinally in a proximal direction, wherein at least one proximal lateral outlet of the hollow space is provided within a handle part of the obturator, and wherein the hollow space is in connection with a passage of an adapter part of an adapter, which passage extends at a finite angle to the longitudinal extent of the hollow space.