Stomach tube space registration and dynamic positioning method based on historical features

Abstract

The invention provides a stomach tube space registration and dynamic positioning method based on historical features, and relates to the technical field of medical instruments, and the method comprises the following steps: data acquisition: recording a catheterization path curve when the catheterization of a patient succeeds, and determining the catheterization path curve as a physiological feature curve; data calibration: marking coordinates of key feature points such as an airway opening, key parts of an esophagus and a stomach entrance on the physiological feature curve; space registration: registering the real-time catheter advancing curve and the physiological characteristic curve in the same coordinate system, and aligning data; dynamic positioning: calculating the position deviation of the front end of the stomach tube, dynamically calibrating based on a deviation value, and controlling the stomach tube to move along a physiological characteristic curve, in the data acquisition step, the physiological characteristic curve is used as a historical reference for path matching in a subsequent tube indwelling process, and in the data calibration step, the tube indwelling control precision is improved by more than or equal to 15% by dividing characteristic sections; and by utilizing a historical physiological curve, the catheterization path deviation is less than or equal to 2mm, and the control precision is improved by 30%.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and more specifically, relates to a method for spatial registration and dynamic positioning of a gastric tube based on historical features. Background Art

[0002] Traditional nasogastric tube placement relies on manual experience and lacks real-time path monitoring and dynamic error correction, which can easily lead to problems such as airway misplacement (an incidence of approximately 5%-10%) and inadequate placement accuracy (deviation ≥ 5mm). Existing technologies fail to fully utilize the patient's historical placement characteristics (physiological path curve) for precise registration, and their dynamic control capabilities are limited. This invention addresses these pain points through spatial registration, dynamic positioning, and an early warning mechanism, improving both the safety and accuracy of placement. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a gastric tube spatial registration and dynamic positioning method based on historical features to solve the above problems.

[0004] A method for spatial registration and dynamic positioning of a gastric tube based on historical characteristics includes: data acquisition: recording the tube placement path curve when the patient's tube is successfully placed and determining it as a physiological characteristic curve; data calibration: marking the coordinates of key feature points such as the airway opening, key parts of the esophagus, and the gastric entrance on the physiological characteristic curve; spatial registration: aligning the real-time tube placement progress curve and the physiological characteristic curve in the same coordinate system to align the data; dynamic positioning: calculating the position deviation of the front end of the gastric tube, dynamically calibrating it based on the deviation value, and controlling its movement along the physiological characteristic curve.

[0005] Preferably, in the data acquisition step, the physiological characteristic curve is used as a historical reference for path matching in the subsequent catheterization process. The data calibration step realizes real-time evaluation of the catheterization progress by dividing the characteristic segments. The spatial registration algorithm adopts coordinate alignment technology to unify the spatial position of the physiological characteristic curve and the travel curve to improve the position estimation accuracy. The dynamic positioning improves the catheterization control accuracy by ≥15% by correcting the catheterization path deviation in real time.

[0006] A gastric tube placement system includes: a data acquisition module for recording physiological characteristic curves; a calibration module for marking key characteristic points; a registration module for executing a spatial registration algorithm; and a dynamic positioning module for calculating deviations and calibrating.

[0007] Preferably, the system also includes an early warning module. When the matching degree between the tube placement curve and the physiological characteristic curve is lower than a preset threshold (such as 0.8), a path deviation warning is triggered. When the gastric tube approaches the airway opening, the early warning module combines air flow rate detection (enhanced warning when the flow rate is > 5L / min) to prevent the tube from entering the airway by mistake. The system supports multiple patient physiological characteristic libraries, automatically matches historical data, and shortens the registration time by ≥50%. The dynamic positioning module adopts an adaptive algorithm to adjust the calibration parameters according to real-time deviations to adapt to uncertain factors such as changes in patient position.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] High-precision registration: Using historical physiological curves, the catheter path deviation is ≤2mm, and the control accuracy is improved by 30%;

[0010] Dynamic error correction: real-time correction of operational errors (such as hand shaking, body position changes), reducing the catheterization error rate by ≥80%;

[0011] Intelligent early warning: The early warning response time of key positions (airway openings) is ≤200ms. Combined with air flow rate detection, the early warning rate of airway misentry is 100%;

[0012] Efficient adaptation: Multiple patient feature libraries support batch catheterization (such as in ICU scenarios), improving registration efficiency by 50%;

[0013] Clinical safety: Reduce medical accidents (such as aspiration and airway injury) and improve patient comfort and medical operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the gastric tube spatial registration system of the present invention;

[0015] Figure 2 Schematic diagram of the spatial registration system of the present invention. DETAILED DESCRIPTION

[0016] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0017] See also Figure 1-Figure 2The present invention provides a method for spatial registration and dynamic positioning of a gastric tube based on historical characteristics, including: data acquisition: recording the tube placement path curve when the patient's tube is successfully placed and determining it as a physiological characteristic curve; data calibration: marking the coordinates of key feature points such as the airway opening, key parts of the esophagus, and the stomach entrance on the physiological characteristic curve; spatial registration: aligning the real-time tube placement progress curve with the physiological characteristic curve in the same coordinate system to align the data; dynamic positioning: calculating the position deviation of the front end of the gastric tube, dynamically calibrating it based on the deviation value, and controlling its movement along the physiological characteristic curve.

[0018] During the data acquisition step, the physiological characteristic curve serves as a historical reference for path matching in the subsequent catheterization process. The data calibration step achieves real-time assessment of the catheterization progress by dividing the characteristic segments. The spatial registration algorithm uses coordinate alignment technology to unify the spatial position of the physiological characteristic curve and the travel curve to improve the position estimation accuracy. Dynamic positioning improves the catheterization control accuracy by ≥15% by correcting the catheterization path deviation in real time.

[0019] A gastric tube placement system includes: a data acquisition module for recording physiological characteristic curves; a calibration module for marking key characteristic points; a registration module for executing a spatial registration algorithm; and a dynamic positioning module for calculating deviations and calibrating.

[0020] The system also includes an early warning module. When the matching degree between the tube placement curve and the physiological characteristic curve is lower than the preset threshold (such as 0.8), the path deviation warning is triggered. When the gastric tube approaches the airway opening, the early warning module combines air flow rate detection (enhanced warning when the flow rate is > 5L / min) to prevent it from entering the airway by mistake. The system supports multiple patient physiological characteristic libraries, automatically matches historical data, and shortens the registration time by ≥50%. The dynamic positioning module uses an adaptive algorithm to adjust the calibration parameters according to real-time deviations to adapt to uncertain factors such as changes in patient position.

[0021] Working principle:

[0022] Data collection and calibration:

[0023] When the catheter is successfully placed for the first time, the recorded path is the physiological characteristic curve (historical benchmark);

[0024] Mark key nodes such as the airway, esophagus, and stomach, and divide them into feature segments.

[0025] Spatial Registration:

[0026] During tube placement, the front end position of the gastric tube is monitored in real time to generate a progress curve .

[0027] Dynamic positioning and error correction:

[0028] Calculate the deviation value PID control or adaptive algorithm is used to adjust the front end position of the gastric tube so that it moves along the Movement; Example: If the travel curve deviates (matching degree < 0.8), the system automatically calibrates and corrects the path.

[0029] Early warning mechanism:

[0030] When approaching the airway, if and If the matching degree is low, an audible and visual warning will be triggered;

[0031] Combined with air flow velocity detection in the airway section (enhanced warning when the flow velocity is abnormal), double protection is provided to prevent accidental entry into the airway.

[0032] Example 1: Basic tube monitoring

[0033] Steps: Acquire physiological curve → calibrate feature points → align movement curve → dynamic calibration;

[0034] Effect: The catheterization deviation is ≤2mm, and the progress assessment error is <1%, which is suitable for routine clinical catheterization.

[0035] Example 2: Intelligent Early Warning System

[0036] Improvement: Based on Example 1, matching degree calculation (threshold 0.8) and airway segment warning are added;

[0037] Effect: 100% warning rate for airway misentry, reducing medical accidents, suitable for intubation of comatose and elderly patients.

[0038] Example 3: Air velocity enhancement warning

[0039] Improvement: integrated flow rate sensor in the airway segment (when the flow rate is > 5L / min, the warning level is increased);

[0040] Effect: The warning response time is shortened by 200ms, and the airway identification accuracy is improved by 20%, making it suitable for intubation of mechanically ventilated patients.

[0041] Example 4: Multi-patient feature library

[0042] Improvement: Establish a database of patient physiological characteristics and automatically call historical data for registration;

[0043] Effect: Registration time is shortened by 50% (from 20s to 10s), making it suitable for batch catheterization in the ICU (e.g., 5-10 cases / hour).

[0044] Example 5: Adaptive dynamic calibration

[0045] Improvement: Using a neural network algorithm to adjust calibration parameters in real time (e.g., modifying the path based on the patient's swallowing movements);

[0046] Effect: Dynamic calibration accuracy is improved by 15% (deviation ≤ 1.5mm), making it suitable for patients with variable body positions (such as turning over) or for catheterization in children.

[0047] Comparison of Examples

[0048] Example Core improvements Improved accuracy Improved efficiency Applicable Scenarios 1 Basic functions 30% - Conventional catheterization 2 Early warning function - - High-risk catheterization (coma, elderly) 3 Flow rate detection 20% (airway identification) 200ms (early warning response) Mechanically ventilated patients 4 Feature Library - 50% (registration time) ICU bulk catheterization 5 Adaptive algorithm 15% (dynamic calibration) - Changing body positions / pediatric catheterization

[0049] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

Claims

1. A method for spatial registration and dynamic positioning of a gastric tube based on historical features, characterized in that: include: Data collection: Record the catheterization path curve when the patient's catheterization is successful and determine it as the physiological characteristic curve; Data calibration: Mark the coordinates of key feature points such as the airway opening, key parts of the esophagus, and the stomach entrance on the physiological characteristic curve; Spatial registration: align the real-time catheterization curve and the physiological characteristic curve in the same coordinate system to align the data; Dynamic positioning: Calculate the position deviation of the front end of the gastric tube, dynamically calibrate based on the deviation value, and control its movement along the physiological characteristic curve.

2. A method for spatial registration and dynamic positioning of a gastric tube based on historical features as claimed in claim 1, characterized in that: In the data collection step, The physiological characteristic curve serves as a historical reference for path matching during subsequent catheterization procedures.

3. A method for spatial registration and dynamic positioning of a gastric tube based on historical features as claimed in claim 1, characterized in that: The data calibration step realizes real-time evaluation of the catheterization progress by dividing the feature segments.

4. A method for spatial registration and dynamic positioning of a gastric tube based on historical features as claimed in claim 1, characterized in that: The spatial registration algorithm adopts coordinate alignment technology to unify the spatial positions of the physiological characteristic curve and the movement curve, thereby improving the position estimation accuracy.

5. The method for spatial registration and dynamic positioning of a gastric tube based on historical features according to claim 1, characterized in that: The dynamic positioning improves the catheter placement control accuracy by ≥15% by correcting the catheter placement path deviation in real time.

6. A gastric tube placement system, using the method of claims 1-5, characterized in that: include: Data acquisition module: record physiological characteristic curves; Calibration module: marking key feature points; Registration module: executes spatial registration algorithm; Dynamic positioning module: calculate deviation and calibrate.

7. A gastric tube placement system according to claim 6, characterized in that: The system also includes an early warning module, which triggers a path deviation early warning when the matching degree between the catheter placement curve and the physiological characteristic curve is lower than a preset threshold.

8. A gastric tube placement system according to claim 7, characterized in that: When the gastric tube approaches the airway opening, the early warning module combines air flow rate detection to prevent it from accidentally entering the airway.

9. A gastric tube placement system according to claim 6, characterized in that: The system supports multiple patient physiological feature libraries, automatically matches historical data, and shortens registration time by ≥50%.

10. A gastric tube placement system according to claim 6, characterized in that: The dynamic positioning module uses an adaptive algorithm to adjust calibration parameters according to real-time deviations to adapt to uncertainties such as changes in patient position.

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