24F Laser Resectoscope With Segmented Cooling And Flushing
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Solution Overview
Problem
Traditional laser resectoscopes with a 26 F circumferential diameter are inadequate for patients with smaller urethras, leading to reduced water back systems that cause blurred surgical vision due to unmanaged bleeding and inefficient waste liquid discharge.
Innovation Solution
A laser resectoscope designed for minor caliber with a 24 F circumference, featuring a water back system with triangular cross-section water inlet pipes, a water inlet system for cooling and cleaning, and an observation system with expanded field of view, allowing efficient waste liquid discharge and improved surgical clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the circumferential diameter of the laser resectoscope is reduced from 26F to 24F to accommodate patients with smaller urethras, then the adaptability to patients is improved, but the water back system capacity is reduced causing inefficient waste liquid discharge and blurred surgical vision
Solution Approach 1:
The water inlet pipe is divided into multiple sections with different functions: a first water inlet section for cooling the laser fiber and a second water inlet section for flushing the surgical site. This segmentation allows optimized water flow distribution despite the reduced overall caliber of the resectoscope.
Solution Approach 2:
The patent introduces a vertical dimension to water flow management by creating layered water inlet structures with multiple outlets at different heights and angles. This dimensional approach maximizes the use of available space within the 24F caliber to achieve effective waste liquid discharge.
2Ease of operation
If the circumferential diameter is reduced to 24F, then the ease of insertion into smaller urethras is improved, but the water back system becomes severely reduced leading to unmanaged bleeding and blurred surgical field
Solution Approach 1:
Different sections of the water inlet pipe are designed with different outlet configurations: the first water inlet section has outlets directed toward the laser fiber for localized cooling, while the second water inlet section has outlets positioned to flush the surgical site and remove blood. This local quality differentiation ensures effective blood management despite the reduced overall caliber.
Solution Approach 2:
Cooling water acts as an intermediary substance that serves multiple functions: it cools the laser fiber to prevent overheating, flushes the surgical site to remove blood and debris, and maintains clear surgical vision. This intermediary fluid compensates for the reduced size of the resectoscope.
3Productivity
If the cross section area of the water inlet pipe is reduced to less than half of the water outlet pipe area in a 24F resectoscope, then the water back capacity is improved for waste discharge, but the space for other components is reduced
Solution Approach 1:
The laser sheath, optical fiber, and mirror tube are nested within the water inlet pipe structure. The laser sheath is inserted through the water inlet pipe, the optical fiber is positioned within the laser sheath, and the mirror tube is arranged alongside these components. This nesting allows all necessary components to coexist in the limited space of the 24F resectoscope.
Solution Approach 2:
Components are arranged in multiple spatial dimensions rather than simply along a single linear axis. The laser sheath, mirror tube, and water inlet pipe are positioned in different radial and axial positions, utilizing three-dimensional space efficiently to accommodate all components while maintaining adequate water flow capacity.
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
Enhances surgical efficiency by ensuring clear vision and effective waste liquid management, accommodating a wider range of patients and reducing urethral stricture risks while maintaining cooling and flushing functions.
Implementation Method 1
a water inlet system, including a water inlet pipe and a water inlet structure; the water inlet pipe inserted in the water return pipe; one end of the water inlet pipe connected with the water inlet structure, and the other end of the water inlet pipe able to extend outside the water return pipe; the water inlet structure used to provide cooling water to the water inlet pipe
Implementation Method 2
a laser sheath system, including a laser sheath, an optical fiber and a laser head; the laser sheath inserted in the water inlet pipe, and able to extend outside the water inlet pipe, the optical fiber inserted in the laser sheath; the laser head connected to the optical fiber, and able to extend out of the laser sheath
Implementation Method 3
the laser head connected to the optical fiber, and able to extend out of the laser sheath
Implementation Method 4
a water back system, including a water return pipe and a water outlet structure; one end of the water return pipe connected with the water outlet structure, a plurality of water return holes defined on the surrounding of the other end of the water return pipe; the water outlet structure used to discharge reclaimed water from the plurality of water return holes to the water return pipe
Implementation Method 5
an observation system, including a mirror tube and an eyepiece; the mirror tube inserted into one end of the water inlet pipe, able to extend to the other end of the water inlet pipe; the center of the mirror tube being on the side near the water return pipe; a diagonal plane defined on the end of the mirror tube near the water inlet pipe, and the diagonal plane being towards to the end of the laser sheath; the eyepiece used to view an image at the water inlet pipe through the mirror tube
Data Source
AI summary
A laser resectoscope for minor caliber includes a water back system, a water inlet system, a laser sheath system, an observation system. The water back system includes a water return pipe and a water outlet structure. The water inlet system includes a water inlet pipe and a water inlet structure. The laser sheath system includes a laser sheath, an optical fiber and a laser head. The observation system includes a mirror tube and an eyepiece. It is increased for the water return of the laser resectoscope, and the laser resectoscope in F24 can be used to meet the surgical requirements of the conventional laser resectoscope in F26 clinically.