Magnetic Lancet Driver with Feedback Control for Blood Sampling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current lancing devices for blood glucose monitoring in diabetic patients are inefficient, often requiring multiple steps, causing pain, and are difficult to use due to manual dexterity and hand-eye coordination requirements, especially for elderly patients, with limited success in generating spontaneous blood samples.
Innovation Solution
A tissue penetration device with a controllable driver using a magnetic source and position sensor to control lancet displacement, velocity, and retraction, integrated with a sampling module for one-step blood sampling and analysis, reducing pain and improving user convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical launchers are used with spring, cam and mass actuators to drive the lancet, then the lancing action can be performed, but the success rate of generating spontaneous blood samples is limited to about 50% and requires multiple strikes
Solution Approach 1:
The patent applies parameter changes by varying the lancet velocity and penetration depth through programmable control of the driver. The system adjusts these parameters based on feedback from position sensors to optimize blood sample generation, improving the success rate from 50% to higher reliability with fewer strikes.
Solution Approach 2:
The patent implements feedback control by using position sensors to monitor lancet displacement and velocity in real-time. This feedback is fed to a processor that adjusts the driver parameters dynamically, enabling precise control to achieve reliable spontaneous blood sample generation with minimal strikes.
2Ease of operation
If existing lancing devices are used, then blood sampling can be performed, but they require manual dexterity and hand-eye coordination that is difficult for elderly patients with retinopathies and neuropathies
Solution Approach 1:
The patent applies self-service by enabling the device to automatically control and perform the lancing operation based on sensor feedback. The processor autonomously adjusts lancet parameters without requiring manual intervention, making the device easy to operate for patients with limited manual dexterity while reducing the complexity of user actions.
Solution Approach 2:
The patent replaces manual mechanical control with an automated control system that uses sensors and electronic drivers to manage lancet movement. This substitution eliminates the need for complex manual coordination while maintaining precise control over the lancing process.
3Object-affected harmful factors
If mechanical stops and dampening are used to control lancet penetration depth, then skin penetration can be limited, but multiple strikes occur due to recoil and vibratory stimulation of the skin
Solution Approach 1:
The patent uses feedback from position sensors to continuously monitor lancet penetration depth and adjust the driver in real-time. This eliminates the need for mechanical stops that cause recoil, providing precise control of penetration depth while preventing multiple strikes and associated pain.
Solution Approach 2:
The patent replaces mechanical stops and dampening systems with an electronically controlled driver that uses sensor feedback to regulate lancet movement. This substitution eliminates mechanical recoil and vibratory stimulation while maintaining precise penetration control.
4Productivity
If one-step lancing and sample acquisition is implemented, then testing compliance is improved, but current devices require spontaneous blood droplet formation which occurs only about 50% of the time
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting lancet velocity and penetration depth based on sensor feedback to optimize the conditions for spontaneous blood sample generation. This increases the consistency and reliability of one-step sampling success, improving both productivity and reliability simultaneously.
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 device reliably generates spontaneous blood samples with reduced pain and increased user convenience by controlling lancet penetration and withdrawal, enhancing the success rate of blood collection and simplifying the testing process for diabetic patients.
Implementation Method 1
A magnetic source produces a magnetic field in a magnetically active region. A magnetic member disposed at least partially in the magnetically active region is coupled to the lancet.
Implementation Method 2
the magnetic source is activated to produce a magnetic field in the magnetically active region generating a magnetic force between the magnetic field and the magnetic member and driving the tissue penetration element into the patient's tissue
Implementation Method 3
A position sensor is configured to measure the position of the tissue penetration element
Data Source
AI summary
A tissue penetration device and method of using same. The tissue penetration device may optionally include sampling and analyzing functions, which may be integrated. An embodiment provides control of a lancet used for sampling blood. Electric field coils or solenoids may drive the lancet using electromagnetic force. Advancement and retraction of a lancet may be controlled by a feedback loop monitoring the position and velocity of the lancet embodiments of the lancet driver can be configured to follow a predetermined tissue lancing profile. Embodiments of the invention include a lancet and method for using a lancet to maintain the patency of the wound tract once the lancet has cut into the skin.