Surgical Handle Adjustable Grip Actuation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing surgical instrument handles lack an efficient mechanism for actuating microsurgical instrument heads, particularly in providing a comfortable and adjustable grip for users during reciprocating movements.
Innovation Solution
A manually actuated surgical instrument handle with an interior assembly comprising a cylindrical base, elongate rod, piston, ring, piston stop, and rear cap, and an exterior assembly with tubular grip members, allowing for adjustable radial spacing between grip arms for user comfort, enabling effective actuation of surgical instrument heads through a spring-biased mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the grip members are fixed in position, then the structure is simple, but the user cannot adjust for comfort during reciprocating movements
Solution Approach 1:
The grip members are made adjustable rather than fixed, allowing users to modify the radial spacing according to their comfort needs. This dynamic adjustment capability resolves the contradiction by enabling customization while maintaining a relatively simple overall structure through the use of basic mechanical adjustment features.
2Ease of operation
If the piston moves freely without constraints, then the actuation is smooth, but the reciprocating movement cannot be properly controlled
Solution Approach 1:
The piston is designed to perform reciprocating movement with defined constraints that create periodic motion. The constraint mechanism guides the piston through controlled forward and backward movements, enabling reliable actuation of the surgical instrument while maintaining smooth operation through proper mechanical guidance.
3Speed
If the spring bias is strong, then the piston returns quickly, but the actuation force becomes too great for manual operation
Solution Approach 1:
The spring bias parameters are optimized to provide sufficient return force for quick piston recovery while remaining within manually operable limits. The spring characteristics are carefully selected to balance the return speed requirement with the need for manageable actuation forces during manual operation.
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 handle provides efficient actuation of surgical instrument heads with adjustable grip comfort, enhancing user experience and operational efficiency by allowing customizable grip width and maintaining effective movement of surgical instruments.
Implementation Method 1
The instrument handle of the invention is manually actuated in a manner to be described, to move a piston on the instrument handle that in turn moves the head piston of the surgical instrument head attached to the handle. The bias on the instrument head piston against the piston of the instrument handle causes the surgical instrument at the instrument head distal end to move from its first stage of movement to its second stage of movement.
Data Source
AI summary
A surgical instrument handle operates a microsurgical instrument on a surgical instrument head by manipulation of the instrument handle. The instrument handle has an elongate center rod with a ring mounted on the rod for reciprocating movement. The ring is operatively associated with the surgical instrument head for operation of the microsurgical instrument of the head. A plurality of resilient arms extend along the length of the rod and engage against a sliding surface of the ring. The inward and outward movement of the plurality of arms reciprocates the ring on the handle rod to cause operation of the surgical instrument head.