Enhanced Proximal Loaded Disposable Loading Unit for Surgical Stapler

Publication ID: 24-11857186_0001_PTD

Published: November 07, 2025

Category:Direct Improvements & Enhancements

Legal Citation

pr1or.art Inc., “Enhanced Proximal Loaded Disposable Loading Unit for Surgical Stapler,” Published Technical Disclosure No. 24-11857186_0001_PTD, Published November 07, 2025, available at https://archive.pr1or.art/24-11857186_0001_PTD

This technical disclosure describes improvements that would be readily apparent to a Person Having Ordinary Skill In The Art (PHOSITA) when considered in combination with the foundational architecture disclosed in U.S. Patent No. 11,857,186.

Summary of the Inventive Concept

The invention introduces advanced features to the original proximal loaded disposable loading unit for surgical stapler, enhancing its performance, safety, and efficiency in various medical applications.

Background and Problem Solved

The original patent, despite its innovative design, had limitations in terms of staple firing pressure control, power reliability, articulation precision, and infection risk. The new inventive concept addresses these limitations by integrating advanced sensors, redundant power sources, improved articulation mechanisms, and integrated cleaning systems.

Detailed Description of the Inventive Concept

The enhanced loading unit features an integrated sensor to detect tissue thickness, automatically adjusting staple firing pressure accordingly. Additionally, it includes a redundant power source, providing backup power in case of primary power failure. The advanced articulation mechanism allows for more precise jaw movement and reduced tissue trauma. Furthermore, the integrated cleaning system reduces the risk of surgical site infection. These features improve the overall performance, safety, and efficiency of the surgical stapler.

Novelty and Inventive Step

The new inventive concept introduces novel features that overcome the limitations of the original patent, providing a more efficient, safer, and more reliable surgical stapling experience. The integration of advanced sensors, redundant power sources, improved articulation mechanisms, and integrated cleaning systems represents a non-obvious improvement over the prior art.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept could include variations in sensor types, power source configurations, articulation mechanisms, and cleaning system designs. These variations could be tailored to specific surgical procedures, tissue types, or user preferences, ensuring broad conceptual coverage.

Potential Commercial Applications and Market

The enhanced proximal loaded disposable loading unit has significant commercial potential in the medical device industry, particularly in the surgical stapling market. Target industries include hospitals, surgical centers, and medical research institutions, where the inventive concept's improved performance, safety, and efficiency can provide a competitive edge.

CPC Classifications

Section	Class	Group
A	A61	A61B17/07207
A	A61	A61B17/00
A	A61	A61B17/0682
A	A61	A61B17/072
A	A61	A61B17/083
A	A61	A61B17/10
A	A61	A61B17/1155
A	A61	A61B17/1285
A	A61	A61B17/29
A	A61	A61B17/3201
A	A61	A61B17/320016
A	A61	A61B34/30
A	A61	A61B50/30
A	A61	A61B17/00234
A	A61	A61B2017/00017
A	A61	A61B2017/0046
A	A61	A61B2017/00115
A	A61	A61B2017/00398
A	A61	A61B2017/00477
A	A61	A61B2017/00734
A	A61	A61B2017/07257
A	A61	A61B2017/07271
A	A61	A61B2017/2905
A	A61	A61B2017/2927
A	A61	A61B2017/2929
A	A61	A61B2017/2948
A	A61	A61B2050/3014
A	A61	A61B2090/0813

Section 103 Obviousness Analysis (PHOSITA)

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Field of Art

Surgical instrumentation, specifically surgical stapling devices and loading units for medical procedures, involving biomechanical engineering, medical device design, and surgical technology

Person of Ordinary Skill (PHOSITA) Profile

A biomedical engineer or medical device designer with advanced degree, 3-5 years experience in surgical instrumentation, familiar with mechanical design, sensor integration, power systems, and medical device safety standards

Obviousness Rationale

A PHOSITA would recognize that the disclosed variations represent predictable incremental improvements to the existing surgical stapler loading unit design. The proposed enhancements like integrated sensors, redundant power sources, and advanced articulation mechanisms are logical extensions of known surgical device optimization techniques. These modifications address inherent limitations in existing designs using standard engineering problem-solving approaches readily available to skilled practitioners in the field.

Obvious Combinations & Variations

Source Patent Element

Removable loading unit with cartridge containing surgical fasteners

PTD Variation

Adding integrated tissue thickness sensor to automatically adjust staple firing pressure

Obviousness Reasoning

Adaptive sensor technology is a known technique in medical devices for optimizing performance, and a PHOSITA would find it obvious to incorporate real-time tissue sensing into a surgical stapler's loading mechanism

Source Patent Element

Surgical stapler with proximal loading configuration

PTD Variation

Implementing redundant power source for increased device reliability

Obviousness Reasoning

Backup power systems are standard engineering practice in critical medical devices, representing a predictable solution to potential power failure risks

Source Patent Element

Surgical loading unit with basic articulation mechanism

PTD Variation

Advanced articulation mechanism allowing more precise jaw movement

Obviousness Reasoning

Incremental improvements in mechanical articulation are expected design iterations for surgical instruments, representing a finite set of predictable engineering solutions

Source Patent Element

Removable loading unit with basic structural configuration

PTD Variation

Integrated cleaning system to reduce surgical site infection risk

Obviousness Reasoning

Infection prevention is a known critical concern in surgical devices, and incorporating cleaning mechanisms represents a logical and foreseeable design enhancement

Source Patent Element

Surgical stapler with modular loading unit design

PTD Variation

Alternative embodiment configurations tailored to specific surgical procedures

Obviousness Reasoning

Modular design allowing procedure-specific adaptations is a standard approach in medical device engineering, representing an obvious extension of existing design principles

35 U.S.C. § 103 Summary: Based on the teachings of US Patent 11857186 and the disclosed technical variations, a person having ordinary skill in the art would find the proposed enhancements to surgical stapler loading units to be obvious and non-patentable. The incremental improvements in sensor integration, power systems, articulation mechanisms, and infection prevention represent predictable design iterations that would be readily conceived by a skilled practitioner without requiring inventive insight.

Original Patent Information

Patent Number	US 11,857,186
Title	Proximal loaded disposable loading unit for surgical stapler
Assignee(s)	REVMEDICA, INC.