Smart Radial Artery Compression for Precise Hemostasis Control
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Solution Overview
Problem
Current radial artery hemostasis methods, such as using elastic bandages or special hemostats, lack precision in compression, leading to complications like ischemia and blood oozing, and are costly, increasing the economic burden on patients.
Innovation Solution
A radial artery smart compression hemostat equipped with a pressure sensor, gear motor, and compression rod, along with vibration and far-infrared temperature sensors, to accurately monitor and adjust pressure based on individual patient conditions, ensuring effective hemostasis and reducing complications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a self-made elastic bandage is used to compress the radial artery puncture site, then hemostasis can be achieved, but the compression force cannot be adjusted, causing venous reflux, pain, swelling, and numbness of the limb
Solution Approach 1:
The patent applies a motor-driven compression mechanism that can dynamically adjust the compression force applied to the radial artery puncture site. The motor drives a compression rod that moves along a guiding channel, enabling real-time adjustment of compression intensity based on patient condition and bleeding status, resolving the contradiction between achieving reliable hemostasis and maintaining ease of operation through adjustability.
2Area of stationary object
If a balloon type radial artery hemostat is used for large area compression, then coverage is improved, but the puncture site cannot be accurately and effectively compressed
Solution Approach 1:
The patent employs a localized compression design where the compression rod with pressing plate focuses compression force precisely on the puncture site rather than distributing it over a large area. This localized approach ensures accurate and effective compression of the specific puncture point while maintaining sufficient coverage through proper positioning and bandage support.
3Reliability
If a spiral type radial artery hemostat is used for compression, then the puncture site can be compressed, but the compression force cannot be controlled and monitored, leading to blood oozing and forearm swelling
Solution Approach 1:
The patent incorporates a force sensor that provides real-time feedback on the compression force applied to the radial artery puncture site. The sensor detects the magnitude of compression force and transmits this information to the control system, which can then adjust the motor-driven compression rod to maintain optimal compression levels, preventing both excessive compression (causing swelling) and insufficient compression (causing blood oozing).
4Ease of operation
If doctors rely on experience to determine bandage tightness, then the process is simple, but the compression force is not scientific and accurate, risking complications from too high or too low pressure
Solution Approach 1:
The patent implements a self-regulating compression system where the force sensor continuously monitors compression force and the control system automatically adjusts the motor-driven compression rod to maintain optimal pressure. This self-service mechanism eliminates the need for doctors to rely on subjective experience to determine bandage tightness, providing scientific and accurate compression force control while maintaining operational simplicity through automated adjustment.
5Reliability
If a special radial artery hemostat is used as a consumable, then hemostasis can be achieved, but the high device cost brings economic burden to patients
Solution Approach 1:
The patent divides the hemostat system into reusable and disposable components. The motor-driven compression device with force sensor and control system serves as a reusable unit that can be sterilized and used multiple times. Only the components that directly contact the patient (such as the bandage and pressing plate) are designed as disposable consumables. This segmentation significantly reduces the overall cost per procedure while maintaining reliable hemostasis effectiveness.
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 smart hemostat provides precise pressure control, minimizing ischemia and blood oozing, reduces patient discomfort, and lowers medical costs by being reusable with replaceable components.
Implementation Method 1
a pressure sensor, a gear motor, and a compression rod (4); the pressure sensor and the gear motor both are disposed in the housing (1)... a pressure received by the compression pad (6) in contact with the radial artery puncture site is transmitted to the pressure sensor (2)
Implementation Method 2
the gear motor (3) is fixedly disposed on a measuring end of the pressure sensor (2)... an output end of the gear motor (3) is threadedly connected to an end of the compression rod (4)
Implementation Method 3
an output end of the gear motor (3) is threadedly connected to an end of the compression rod (4)
Implementation Method 4
two vibration sensors (8) are disposed on the pressing plate (5)... respectively configured to monitor a pulse intensity at the proximal end and a pulse intensity at the distal end
Implementation Method 5
far-infrared temperature sensors (9) are disposed on the pressing plate (5)... arranged along the lengthwise direction of the pressing plate (5)... according to temperatures returned by the far-infrared temperature sensors (9)
Data Source
AI summary
A radial artery smart compression hemostat includes a housing, a pressure sensor, a gear motor and a compression rod. The pressure sensor and the gear motor are disposed in the housing. A fixed end of the pressure sensor is fixedly connected to the housing. The gear motor is fixedly disposed on a measuring end of the pressure sensor. An output end of the gear motor is threadedly connected to an end of the compression rod. A guiding channel is disposed on the housing and has the compression rod slidably disposed therein. A pressing plate is disposed on an end of the compression rod, exposed outside the housing, and has a compression pad detachably sleeved thereon. A bandage is disposed on the housing and used to tie the radial artery smart compression hemostat to a patient's wrist and thereby the compression pad is compressed on a radial artery puncture site.