Medical Arm Device With Adjustable Inter-Axis Distance
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Solution Overview
Problem
In laparoscopic surgery, the adjustment of the endoscope's field of view can vary significantly between operators, leading to inconsistencies in surgical progress and increased labor costs due to the need for manual control by a scopist, while also posing safety risks due to potential interference between the surgeon's hands and the medical arm device.
Innovation Solution
A medical arm device with a second arm part featuring at least two horizontal rotation axes and an inter-axis distance changing unit, allowing for adjustable distance between these axes, and a tip part with three degrees of freedom rotation axes (optical axis, yaw, and pitch) to support the endoscope, enabling precise control and avoidance of interference with the surgeon.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a medical arm device with fixed horizontal rotation axes is used to support the endoscope, then the device structure is simple, but the device cannot avoid interference with the surgeon's hands and arms
Solution Approach 1:
The patent applies the dynamics principle by making the distance between horizontal rotation axes adjustable rather than fixed. The inter-axis distance changing unit allows the arm device to dynamically adapt its configuration, enabling the tips of the arms to reach positions that avoid interfering with the surgeon's hands and arms while maintaining a relatively simple overall structure.
2Ease of operation
If manual control of the endoscope by a scopist is used, then the control technique can be adjusted, but labor costs increase and safety risks arise due to potential interference
Solution Approach 1:
The patent applies the self-service principle by designing the medical arm device to automatically support and position the endoscope without requiring manual operation by a scopist. The device's multi-degree-of-freedom structure with adjustable inter-axis distance enables it to self-adjust to optimal positions, eliminating the need for continuous manual intervention while reducing labor costs and safety risks.
3Adaptability or versatility
If the distance between horizontal rotation axes is fixed, then the device structure is simpler, but the operational range and adaptability are limited
Solution Approach 1:
The patent makes the inter-axis distance adjustable through the inter-axis distance changing unit, allowing the device to adapt to different surgical scenarios and operational requirements. This dynamic adjustment capability expands the operational range and versatility without significantly complicating the overall device structure.
Solution Approach 2:
The patent applies parameter changes by allowing the distance between horizontal rotation axes to vary. This parameter adjustment enables the device to adapt to different surgical fields, patient anatomies, and procedural requirements, thereby enhancing versatility while maintaining structural simplicity through the use of an inter-axis distance changing unit.
Data Source
AI summary
Provided is a medical arm device that avoids interference with a surgeon.A medical arm device includes a first arm part including a tip part that supports a medical instrument such as an endoscope, and a second arm part that supports the first arm part, and includes at least two horizontal rotation axes and an inter-axis distance changing unit that changes a distance between the two horizontal rotation axes. The tip part includes a structure in which joint members corresponding to rotation axes of three degrees of freedom that determine an attitude of the medical instrument are directly connected, and a rotation axis around a longitudinal axis of the medical instrument, a yaw axis in a case where the rotation axis around the longitudinal axis is a roll axis, and a pitch axis are disposed in order from a most tip part.