Adjustable Vent Sheath for Renal Stone Suction Pressure Control
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Solution Overview
Problem
Existing medical devices used for removing obstructions from body lumens face challenges such as over-pressurization of the patient's body, potential injury, increased complexity, and risk due to improper suction and irrigation management, which can prolong procedure time and require high skill levels.
Innovation Solution
A medical device with a sheath and actuator system that allows for adjustable suction control and vent size, incorporating a seal and lumens for fluid management, reducing the risk of over-pressurization and enhancing procedural efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If irrigation and suction are applied to remove renal stones, then material removal is achieved, but the patient's body becomes over-pressurized causing potential injury
Solution Approach 1:
The device incorporates a dynamically adjustable vent mechanism that allows real-time modification of the vent size during the procedure. The actuator enables the operator to increase or decrease the vent opening based on intraoperative pressure conditions, transforming a static device into a dynamic system that adapts to changing physiological states to prevent over-pressurization while maintaining material removal efficiency
Solution Approach 2:
The device changes the physical parameter of vent size through mechanical adjustment. By varying the opening area of the vent, the system modifies the pressure dynamics within the body lumen, allowing controlled release of excess pressure while preserving the irrigation-suction flow necessary for stone removal
2Productivity
If suction is applied to remove obstructions, then obstruction removal is achieved, but procedure complexity and skill requirements increase
Solution Approach 1:
The device incorporates a self-regulating vent mechanism that automatically responds to pressure differentials. The elastic member and spring system create a self-adjusting mechanism that reduces the need for complex external control systems, allowing the device to regulate its own venting behavior based on internal pressure conditions while simplifying the overall suction control architecture
3Device complexity
If fixed vent size is used, then device simplicity is maintained, but suction control precision is insufficient
Solution Approach 1:
The device transitions from a static fixed vent to a dynamic adjustable vent through the incorporation of the actuator mechanism. This allows the vent size to be modified during the procedure based on specific operational requirements, providing precise suction control while adding only minimal structural complexity through the mechanical adjustment system
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
The device reduces the risk of patient injury, decreases procedure time, and lowers the skill required for obstruction removal by providing precise control over suction and irrigation, thereby improving procedural safety and efficiency.
Implementation Method 1
The actuation of the actuator is configured to adjust a size of a vent of the medical device
Implementation Method 2
The sheath includes a first lumen extending from the proximal end to the distal end
Implementation Method 3
An oversheath may be utilized to accommodate the ureteroscope and the elongated medical device, and may supply a vacuum source while aspiration is applied to the ureteroscope
Data Source
AI summary
In some aspects, this disclosure includes a medical device comprising: a sheath extending from a proximal end to a distal end. The sheath includes a first lumen extending from the proximal end to the distal end. The medical device further comprises a proximal body coupled to the proximal end of the sheath and a second lumen extending longitudinally through the proximal body; and a first body extending radially outward from the proximal body, and the first body includes a third lumen extending longitudinally through the first body. The first lumen, the second lumen, and the third lumen are fluidically connected. The medical device further comprises a seal positioned at a proximal portion of the proximal body; and an actuator. The actuation of the actuator adjusts a size of a vent of the medical device.