Adjustable Radiography Templates for Precise Vessel Puncture Marking
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Solution Overview
Problem
Clinicians face difficulty in accurately determining the subcutaneous vessel puncture site after invasive cardiology procedures, leading to inadequate closure and potential complications such as bleeding and hematomas, due to variations in skin and skeletal structure and the lack of real-time radiography during sheath extraction.
Innovation Solution
An adjustable radiography template device with radiopaque markers is used to accurately mark the skin, aligning with x-ray images to identify the vessel puncture site, allowing precise application of pressure for effective closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If clinicians rely on visual estimation to determine the vessel puncture site location, then the procedure is simple and quick, but the precision of locating the subcutaneous access point deteriorates, leading to inadequate pressure application and poor closure outcomes
Solution Approach 1:
The patent introduces a radiopaque template as an intermediary tool that bridges the gap between visual estimation and radiographic precision. The template includes radiopaque markers that align with anatomical landmarks visible on fluoroscopic images, allowing clinicians to accurately locate the subcutaneous vessel puncture site without requiring complex imaging equipment or procedures. This intermediary device translates radiographic information into a simple visual guide for precise marker placement.
Solution Approach 2:
The template enables preliminary marking of the skin surface at the exact location where pressure should be applied, before sheath removal. By pre-positioning the template with radiopaque markers aligned to anatomical landmarks on fluoroscopic images, the system allows clinicians to mark the precise puncture site location in advance, ensuring accurate pressure application during closure without requiring real-time imaging guidance at the moment of sheath extraction.
2Measurement precision
If real-time radiography is used during sheath extraction to locate the puncture site, then measurement precision improves, but the procedure time and resource requirements increase
Solution Approach 1:
The template allows preliminary alignment and marking to be performed using fluoroscopic images obtained during the procedure, before sheath removal. The radiopaque markers on the template are aligned with anatomical landmarks visible on the images, and the precise puncture site location is marked on the skin in advance. This preliminary action eliminates the need for time-consuming real-time radiographic guidance at the moment of sheath extraction, reducing loss of time while maintaining measurement precision.
3Reliability
If pressure is applied at the skin incision location instead of the subcutaneous puncture site, then the procedure is simpler, but the effectiveness of closure deteriorates, leading to bleeding and hematomas
Solution Approach 1:
The radiopaque template serves as an intermediary that accurately translates the three-dimensional subcutaneous puncture site location into a two-dimensional skin surface marker position. The template's radiopaque markers are aligned with anatomical landmarks visible on fluoroscopic images, allowing precise identification of where the needle punctured the vessel beneath the skin. This intermediary device eliminates the guesswork and anatomical variability that make direct localization difficult, providing a reliable guide for pressure application that improves closure reliability while maintaining ease of 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 device enhances the likelihood of proper vessel puncture site closure, reducing recovery time and complications by ensuring accurate pressure application, even in varying patient anatomies.
Implementation Method 1
an adjustable radiography template device with radiopaque markers is used to accurately mark the skin, aligning with x-ray images to identify the vessel puncture site
Data Source
AI summary
Some adjustable radiography template devices include a base member including one or more first radiopaque (RO) markers; an arm pivotally coupled to the base member; and a marker member slidably coupled to the arm and including a second RO marker. Some methods of using adjustable radiography template devices include locating a base member on a skin of a patient; locating a marker member of on the skin of the patient; and while a second RO marker is aligned with a puncture site of the blood vessel, marking a location of the second RO marker on the skin of the patient.