Cystotomy Dilator with Capture Cup for Precise Pathway Creation
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Solution Overview
Problem
Current cystotomy procedures face challenges such as inaccurate placement of surgical pathways, risk of cutting adjacent tissues like the intestines, and lack of effective trauma reduction, particularly in obese patients, due to insufficient visualization and inability to secure the bladder wall, leading to potential complications and increased trauma.
Innovation Solution
A cystotomy apparatus with a sound and dilator system that includes a cutting tip with a capture cup for precise pathway creation, an inflatable balloon to prevent the sound from entering the pathway, and a dilator with expandable arms to accommodate larger instruments, ensuring accurate placement and minimizing tissue trauma.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional cystotomy apparatus is used to create a surgical pathway, then the procedure can be performed, but the placement accuracy is poor and there is high risk of cutting adjacent tissues
Solution Approach 1:
The bladder wall is clamped and secured before making the incision. This preliminary action stabilizes the tissue, allowing for precise control of the cutting tip and accurate pathway creation while preventing unintended cuts to adjacent tissues.
Solution Approach 2:
A capture cup with visual indicators serves as an intermediary tool to guide the cutting tip along the correct path. The visual indicators provide real-time feedback on pathway depth and direction, improving placement accuracy and preventing deviation into adjacent tissues.
2Ease of operation
If the surgical pathway is expanded to accommodate larger instruments, then access to the bladder is improved, but tissue trauma increases
Solution Approach 1:
The bladder wall is clamped and secured before pathway expansion. This preliminary stabilization allows for controlled expansion using sequential dilators, minimizing tissue tearing and trauma while achieving sufficient access for larger instruments.
Solution Approach 2:
The dilator apparatus includes expandable arms that can be adjusted dynamically during the procedure. The arms are initially collapsed to fit through the initial incision, then expanded sequentially to widen the pathway progressively, reducing sudden tissue stress and trauma.
3Device complexity
If the sound is allowed to enter the surgical pathway freely, then the procedure is simpler, but the sound may cause additional tissue damage and complicate the procedure
Solution Approach 1:
The bladder wall is clamped and secured before the sound enters the pathway. This preliminary action prevents the sound from causing uncontrolled tissue damage while it is being advanced, maintaining procedural simplicity without increasing tissue trauma.
Solution Approach 2:
The capture cup acts as an intermediary that guides and limits the movement of the sound. The visual indicators on the capture cup provide feedback to control the sound's advancement, preventing it from causing excessive tissue damage while maintaining procedural flow.
4Device complexity
If no bladder wall securing mechanism is used, then the apparatus is simpler, but the bladder wall may move during the procedure leading to inaccurate placement
Solution Approach 1:
The bladder wall is clamped and secured before making the incision. This preliminary stabilization ensures that the bladder wall remains stationary during pathway creation, achieving accurate placement without requiring complex real-time adjustment mechanisms.
Solution Approach 2:
The capture cup includes visual indicators that provide feedback on the depth and position of the cutting tip relative to the bladder wall. This feedback mechanism allows the operator to maintain precise control of the pathway placement while using a relatively simple clamping mechanism.
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 apparatus enhances the accuracy and safety of cystotomy procedures by allowing precise control over the cutting tip, reducing the risk of adjacent tissue damage, and facilitating the expansion of the surgical pathway without undue trauma, thereby minimizing complications and improving procedural efficiency.
Implementation Method 1
an inflatable balloon to prevent the sound from entering the pathway
Implementation Method 2
a dilator with expandable arms to accommodate larger instruments
Data Source
AI summary
A cystotomy apparatus includes a sound from which an advancement device having a cutting tip creates a surgical pathway from the bladder through abdominal tissue to the external abdomen along a predetermined path. The cutting tip is captured and removed from the advancement device in a capture cup located in the predetermined path by an alignment structure. The cutting tip is removed from the advancement device while within the capture cup, to allow a dilator, cannula or catheter to be drawn through the surgical pathway into the bladder.