Combined Debrider and Coagulator for Sinus Surgery
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Solution Overview
Problem
Current medical probes used in functional endoscopic sinus surgery lack a unified solution for both debriding and coagulating tissues within the nasal cavity and paranasal sinuses, requiring separate instruments for cutting and coagulation, which can complicate procedures and reduce efficiency.
Innovation Solution
A medical apparatus with an insertion tube featuring a rotating cutting blade and a conductive element for coagulation, integrated with a suction mechanism, allowing for simultaneous cutting and coagulation with controlled energy delivery and debris extraction, specifically designed for use in nasal and paranasal sinus procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate instruments are used for cutting and coagulation, then each function can be performed with dedicated tools, but the procedure becomes complicated and efficiency is reduced
Solution Approach 1:
The patent combines a cutting blade and a conductive coagulation element into a single insertion tube, allowing both debriding and coagulation functions to be performed with one instrument. The cutting blade rotates within the insertion tube while the conductive element is positioned to contact tissue, enabling simultaneous or sequential cutting and coagulation without requiring separate instruments.
Solution Approach 2:
The insertion tube is designed to perform multiple functions: it houses the rotating cutting blade for tissue debriding, contains the conductive element for coagulation, and incorporates a suction mechanism for debris removal. This multi-functional design eliminates the need for multiple specialized instruments during the procedure.
2Reliability
If energy is continuously delivered to the conductive element, then coagulation is maintained, but the cutting blade cannot rotate freely through the radial window
Solution Approach 1:
The system alternates between periods of cutting blade rotation and periods of energy delivery to the conductive element. The control circuitry restricts energy conveyance to times when the cutting blade is not actively cutting through the radial window, allowing the blade to rotate freely during cutting phases while providing coagulation during non-cutting phases.
Solution Approach 2:
The system dynamically controls the timing of energy delivery based on the rotational position and operational state of the cutting blade. The control circuitry monitors blade rotation and adjusts energy conveyance accordingly, ensuring that energy is only delivered when the blade is not interfering with the conductive element's contact with tissue.
3Productivity
If the cutting blade rotates at high speed, then debriding efficiency is improved, but control and precision are reduced
Solution Approach 1:
The control circuitry monitors the rotation of the cutting blade and adjusts energy delivery timing based on feedback about blade position and operational status. This feedback mechanism allows the system to maintain high rotation speeds for efficient debriding while ensuring that energy is delivered at appropriate moments when the blade is not actively cutting, preserving both speed and control.
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 debriding and coagulation in a single probe, improving procedural efficiency by allowing for controlled cutting and coagulation with independent control over rotation and energy delivery, enhancing tissue removal and hemostasis in sinus surgeries.
Implementation Method 1
a conductor running along the insertion tube from the proximal to the distal end and coupled to provide energy to the conductive element. The conductive element is configured to inject energy into the body cavity in order to perform coagulation
Implementation Method 2
the inner tube proximal end is coupled to a suction device configured to extract debris via the radial suction window opening
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A medical apparatus, including an insertion tube that includes an outer tube having a proximal end and a distal end configured for insertion into a body cavity, with a radial cutting window opening through a wall of the outer tube in proximity to the distal end. The insertion tube also includes an inner tube, contained in and configured to rotate within the outer tube and including a cutting blade that traverses the radial cutting window opening as the inner tube rotates. The medical apparatus further includes a conductive element disposed over an outer surface of the distal end of the insertion tube, and a conductor running along the insertion tube from the proximal to the distal end and coupled to provide energy to the conductive element.