CN114534017B - Method and system for monitoring contact state of infusion cannula and vein - Google Patents
Method and system for monitoring contact state of infusion cannula and vein Download PDFInfo
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- 238000001802 infusion Methods 0.000 title claims abstract description 173
- 210000003462 vein Anatomy 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000012544 monitoring process Methods 0.000 title claims abstract description 38
- 230000003068 static effect Effects 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 14
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- 238000001914 filtration Methods 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 9
- 230000003595 spectral effect Effects 0.000 description 11
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- 238000001228 spectrum Methods 0.000 description 8
- 239000003814 drug Substances 0.000 description 6
- 230000029058 respiratory gaseous exchange Effects 0.000 description 6
- 230000000284 resting effect Effects 0.000 description 6
- 238000001990 intravenous administration Methods 0.000 description 5
- 238000012806 monitoring device Methods 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 239000008280 blood Substances 0.000 description 3
- 210000004369 blood Anatomy 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
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- 230000000670 limiting effect Effects 0.000 description 2
- 208000036828 Device occlusion Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 239000003978 infusion fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
- A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
- A61M5/16836—Monitoring, detecting, signalling or eliminating infusion flow anomalies by sensing tissue properties at the infusion site, e.g. for detecting infiltration
Abstract
The embodiment of the invention provides a method and a system for monitoring the contact state of an infusion cannula and a vein, and relates to the field of medical systems. Aims to solve the problem that the contact state of the infusion cannula and the vein is not timely monitored by manual observation at present. The method comprises the steps of obtaining a first preset parameter representing a static pulse wave of an infusion object and a second preset parameter representing infusion noise; acquiring a first real-time parameter representing the real-time fluctuation frequency of liquid in the infusion tube; and removing a third real-time parameter representing real-time noise in the infusion process according to the first preset parameter, the second preset parameter and the first real-time parameter to obtain a second real-time parameter representing real-time static pulse wave in the infusion process. The system for monitoring the contact state of the infusion cannula and the vein comprises a sensor and a controller. The second real-time parameter is obtained through analysis processing of the first preset parameter, the second preset parameter and the first real-time parameter, and the contact state of the infusion cannula and the vein is judged according to the second real-time parameter, so that intelligent monitoring is realized.
Description
Technical Field
The invention relates to the field of medical systems, in particular to a method and a system for monitoring the contact state of an infusion cannula and a vein.
Background
In infusion therapy, the insertion and retention of the infusion cannula/cannula in the intravenous needle and the use of the port can present problems such as catheter blockage, penetration of the needle through the vein causing general penetration or penetration of corrosive drugs into its surrounding tissue, catheter ectopic, connection of the catheter to the port, etc. The probability of occurrence of the problem, taking permeation as an example, is reported in the study of "journal of infusion care" in tokyo, japan, indicating 8% of 2442 infusion patients involved.
At present, the discovery of the problems mainly depends on manual observation of medical staff and patients, and often is not timely enough, so that the risk of the patients is increased.
Disclosure of Invention
The invention aims to provide a method for monitoring the contact state of an infusion cannula and a vein, which can solve the problem that the contact state of the infusion cannula and the vein is not monitored timely by means of manual observation at present.
The invention further aims to provide a system for monitoring the contact state of the infusion cannula and the vein, which can solve the problem that the contact state of the infusion cannula and the vein is not monitored timely by means of manual observation at present.
Embodiments of the invention may be implemented as follows:
the embodiment of the invention provides a method for monitoring the contact state of an infusion cannula and a vein, which comprises the following steps:
acquiring a first preset parameter representing a static pulse wave of an infusion object and a second preset parameter representing infusion noise;
acquiring a first real-time parameter representing the real-time fluctuation frequency of liquid in the infusion tube;
removing a third real-time parameter representing real-time noise in the infusion process according to the first preset parameter, the second preset parameter and the first real-time parameter to obtain a second real-time parameter representing real-time static pulse wave in the infusion process;
and judging the contact state of the infusion cannula and the vein according to the second real-time parameter.
In addition, the method for monitoring the contact state of the infusion cannula and the vein provided by the embodiment of the invention can also have the following additional technical characteristics:
optionally: the step of removing the third real-time parameter representing the real-time noise in the infusion process according to the first preset parameter, the second preset parameter and the first real-time parameter to obtain the second real-time parameter representing the real-time static pulse wave in the infusion process comprises the following steps:
and if the difference value between the first preset parameter and the second preset parameter is larger than a first threshold value, filtering the third real-time parameter from the first real-time parameter, and separating out the second real-time parameter.
Optionally: and if the difference between the first preset parameter and the second preset parameter is greater than a first threshold, filtering the third real-time parameter from the first real-time parameter, and separating the second real-time parameter includes:
extracting the second real-time parameter from the first real-time parameter by means of digital signal processing filtering.
Optionally: the step of removing the third real-time parameter representing the real-time noise in the infusion process according to the first preset parameter, the second preset parameter and the first real-time parameter to obtain the second real-time parameter representing the real-time static pulse wave in the infusion process comprises the following steps:
and if the difference value between the first preset parameter and the second preset parameter is smaller than a first threshold value, controlling the equipment generating noise to be closed, wherein the first real-time parameter is equal to the second real-time parameter.
Optionally: and if the difference between the first preset parameter and the second preset parameter is smaller than a first threshold, controlling the equipment generating noise to be closed, wherein the step of enabling the first real-time parameter to be equal to the second real-time parameter comprises the following steps of:
and the noise generating device is started after being closed for a preset time.
Optionally: the device for generating noise is an infusion pump.
Optionally: the step of obtaining the first preset parameter representing the intravenous infusion object static pulse wave and the second preset parameter representing the infusion noise comprises the following steps:
the first preset parameters are obtained by measuring the infusion object through a first measuring device, and the second preset parameters are obtained by measuring the noise generating device through a second measuring device.
Optionally: the step of obtaining the first preset parameter representing the intravenous infusion object static pulse wave and the second preset parameter representing the infusion noise comprises the following steps:
acquiring the first preset parameters through the statistical parameters of the existing infusion objects or manually measuring the infusion objects; and obtaining the second preset parameters through calculation of the infusion rate of the model.
Optionally: the step of judging the contact state of the infusion cannula and the vein according to the second real-time parameter comprises the following steps:
if the second real-time parameter is smaller than the third preset parameter, the infusion tube and the vein are in a falling-off state;
if the second real-time parameter is smaller than the fourth preset parameter, the infusion tube presses or even penetrates through the vein to enter the tissue;
wherein the third preset parameter is smaller than the fourth preset parameter.
The embodiment of the invention also provides a system for monitoring the contact state of the infusion cannula and the vein, which comprises a sensor, wherein the sensor is used for detecting a first real-time parameter representing the real-time fluctuation frequency of the liquid in the infusion tube;
the controller is used for removing a third real-time parameter representing real-time noise in the infusion process according to a first preset parameter representing the intravenous pulse wave of the infusion object, a second preset parameter representing the infusion noise and the first real-time parameter, obtaining a second real-time parameter representing the real-time intravenous pulse wave in the infusion process and judging the contact state of the infusion cannula and the vein according to the second real-time parameter.
The method and the system for monitoring the contact state of the infusion cannula and the vein have the beneficial effects that:
the method comprises the steps of analyzing a contact state of an infusion cannula and a vein through a first preset parameter and a second preset parameter, and removing a third real-time parameter representing real-time noise in the infusion process by combining the first real-time parameter to obtain a second real-time parameter representing real-time static pulse wave in the infusion process; and the contact state of the infusion cannula and the vein of the infusion object can be judged according to the second real-time parameters, so that intelligent monitoring is realized. For example, if the second real-time parameter is far below the normal parameter so as to be difficult to identify, the infusion tube and the vein are in a fallen state; if the second real-time parameter is significantly reduced compared to the normal parameter, the infusion tube forces or even penetrates the vein wall into the tissue.
The system comprises a sensor and a controller, wherein the sensor is used for detecting a first real-time parameter representing the real-time fluctuation frequency of liquid in the infusion tube, and the controller obtains a second real-time parameter and a third real-time parameter according to the first preset parameter, the second preset parameter and the first real-time parameter to realize the real-time monitoring of the contact state of the infusion cannula and the vein of the infusion object.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a method for monitoring the contact state of an infusion cannula with a vein according to an embodiment of the present invention;
FIG. 2 is a spectral example of an infusion pump provided by an embodiment of the invention;
FIG. 3 is a block diagram of a system for monitoring the contact state of an infusion cannula with a vein according to an embodiment of the invention;
fig. 4 is a spectrum example of the static pulse wave measured by the flow sensor according to the embodiment of the invention.
Icon: 10-a liquid medicine tank; 20-an infusion pump; 30-a sensor; 40-a controller; 50-a transfusion tube; 60-an external device; 70-vein.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The method and system for monitoring the contact state of the infusion cannula with the vein 70 according to the present embodiment will be described in detail with reference to fig. 1 to 4.
Referring to fig. 1, an embodiment of the present invention provides a method for monitoring a contact state between an infusion cannula and a vein 70, which includes: acquiring a first preset parameter representing a static pulse wave of an infusion object and a second preset parameter representing infusion noise; acquiring a first real-time parameter indicative of the real-time fluctuation frequency of the fluid within the infusion tube 50; removing a third real-time parameter representing real-time noise in the infusion process according to the first preset parameter, the second preset parameter and the first real-time parameter, obtaining a second real-time parameter representing real-time static pulse wave in the infusion process, and judging the contact state of the infusion cannula and the vein according to the second real-time parameter.
It should be noted that: the first preset parameter, the second preset parameter, the third preset parameter, the fourth preset parameter, the first real-time parameter, the second real-time parameter and the third real-time parameter are not single numbers and all refer to characteristic spectral lines. For example, the first preset parameter refers to a characteristic spectral line of the resting pulse of the infusion subject, and typical values include a heart rate spectral line (e.g., 1 Hz) and a respiratory rate spectral line (e.g., 0.2 Hz), as shown in fig. 4. A second preset parameter, as shown in fig. 2. The third real-time parameter is the characteristic spectral line of noise, which is more than 2 Hz.
The first preset parameter and the second preset parameter are used as references for how to process the first real-time parameter, the relation between the first preset parameter and the second preset parameter is different, and different processing modes are adopted for the first real-time parameter to remove the third real-time parameter, so that the second real-time parameter is obtained. The first preset parameters are set differently according to different infusion objects, and the second preset parameters are set differently according to different noise devices of the infusion device adopted in real time. In this embodiment, the noise generating device is an infusion pump 20.
Specifically, the step of obtaining a first preset parameter representing a resting pulse wave of an infusion object and a second preset parameter representing infusion noise includes: the infusion object is measured through the first measuring equipment to obtain a first preset parameter, and the equipment which generates noise is measured through the second measuring equipment to obtain a second preset parameter.
Specifically, the step of obtaining a first preset parameter representing a resting pulse wave of an infusion object and a second preset parameter representing infusion noise includes: acquiring a first preset parameter through the statistical parameter of the existing transfusion object or manually measuring the transfusion object; and obtaining a second preset parameter through calculation of the infusion rate of the model.
Specifically, the first preset parameters include a respiratory rate (respiratory rate) and a pulse rate (pulse rate) (or heart rate) of the infusion subject. The second predetermined parameter includes a noise source of the infusion device such as fluctuations caused by movement (e.g., rotation, compression, peristaltic) of the infusion pump 20. Can be obtained in an on-line off-line manner as in table 1:
TABLE 1
For another example, the approximate range of respiratory rate and heart rate may be derived based on the age of the patient, e.g., an adult respiratory rate of 12-18 beats per minute (i.e., 0.2-0.3 Hz) and a heart rate of 59-99 beats per minute (i.e., 1-1.5 Hz). The change in flow rate or pressure of the liquid generated when the liquid medicine is driven by the infusion pump 20 is also fluctuating and is related to the infusion rate. For example, the motor speed of some electric infusion pump 20 may be about 2.8 revolutions per second (2.8 Hz) at an infusion rate of 10 mL/h. Fluctuations in the flow rate of the infusion fluid caused by the infusion pump 20 may be detected by the sensor 30 and converted to the frequency domain (the frequency spectrum of a particular infusion pump 20 driven by the motor of fig. 2) for recognition by signal processing by the controller 40. Of course, the spectrum of several waves is generally not a single frequency point, but rather has a set of characteristic spectral lines based on these frequencies and their resonance frequencies. With these features, they can be distinguished by means of digital filtering.
During infusion, since the liquid medicine in the infusion tube 50 is in communication with the blood in the vein 70, fluctuations in the blood are conducted into the infusion tube 50 (not the blood itself flows backward). Thus, the measured first real-time parameter is a combined feedback of the second real-time parameter and the third real-time parameter. And removing a third real-time parameter representing real-time noise in the infusion process according to the first preset parameter, the second preset parameter and the first real-time parameter to obtain a second real-time parameter representing real-time static pulse wave in the infusion process, and judging the contact state of the infusion cannula and the infusion object vein 70.
With continued reference to fig. 1, in this embodiment, the step of obtaining the contact state between the infusion cannula and the vein 70 according to the first preset parameter, the second preset parameter and the first real-time parameter includes: if the difference between the first preset parameter and the second preset parameter is larger than the first threshold, filtering the third real-time parameter from the first real-time parameter, and separating the second real-time parameter.
In this way, the first preset parameter, the second preset parameter, the first real-time parameter, the second real-time parameter and the third real-time parameter are not single numbers, and all refer to characteristic spectral lines. If the difference between the first preset parameter and the second preset parameter is greater than the first threshold, the third real-time parameter and the second real-time parameter can be effectively separated, and the typical situation of effective separation is that the main frequencies of the third real-time parameter and the second real-time parameter are in different frequency intervals. Therefore, the difference between the first preset parameter and the second preset parameter is greater than the first threshold, that is, the frequencies represented by the first preset parameter and the second preset parameter are in different frequency intervals.
Referring to fig. 2, if the frequency spectrums obtained by the first preset parameter and the second preset parameter can be separated, for example, the main spectrum line of the frequency spectrum of the second preset parameter-motor noise at the preset infusion rate is above 2Hz, and the main spectrum lines of the signals of the first preset parameter-respiration rate (e.g. 0.2 Hz) and heart rate (e.g. 1 Hz) are lower than the main spectrum line. They may be separated by digital filtering (e.g., low pass filtering) at this point.
That is, if the difference between the first preset parameter and the second preset parameter is greater than the first threshold, filtering the third real-time parameter from the first real-time parameter, and separating the second real-time parameter includes: and extracting the second real-time parameter from the first real-time parameter by means of digital signal processing filtering.
In particular, the processing of the first real-time parameter may employ a method of frequency domain analysis, such as a Fast Fourier Transform (FFT), or other methods such as wavelet analysis. The following is mainly described in terms of frequency domain analysis. The time domain information of the flow/velocity acquired by the sensor 30 is converted into frequency domain information by FFT during infusion. Spectral components (spectral signature lines) of the respiration rate and pulse rate of interest are then extracted from the frequency domain information. The extraction mode mainly adopts digital signal processing filtering (such as bandpass, highpass, lowpass, etc.). In addition, more complex digital signal processing modes such as notch filters and the like can be used.
With continued reference to fig. 1, in this embodiment, the step of obtaining the contact state between the infusion cannula and the vein 70 according to the first preset parameter, the second preset parameter and the first real-time parameter includes: and if the difference value between the first preset parameter and the second preset parameter is smaller than a first threshold value, controlling the equipment generating noise to be closed, wherein the first real-time parameter is equal to the second real-time parameter.
The difference between the first preset parameter and the second preset parameter is smaller than a first threshold, that is, the frequency interval represented by the first preset parameter and the second preset parameter is relatively close to each other, so that the third real-time parameter and the second real-time parameter cannot be effectively separated.
Specifically, if the difference between the first preset parameter and the second preset parameter is smaller than the first threshold, the step of controlling the device generating noise to be turned off, where the first real-time parameter is equal to the second real-time parameter includes: the noise generating device is turned off for a preset time and then turned on.
For example, when the dominant frequencies of the signal and noise differ less or the spectral staggering is difficult to resolve, then the noise source (e.g., infusion pump 20) may be suspended through some small window of time (e.g., 1 minute per hour of duty cycle) so that only a portion of the valid signal (the first real-time parameter) is retained from reaching sensor 30. When the infusion flow stops, the pulse wave presents bidirectional tiny flow or oscillation at the sensor 30, so that the sensor 30 has a bidirectional flow sensing function more effectively.
With continued reference to fig. 1, in this embodiment, after the second real-time parameter and the third real-time parameter are obtained, the contact state between the infusion cannula and the vein 70 to be infused is determined. Timely monitoring of the contact state of the infusion cannula with the vein 70 is achieved.
The second real-time parameter includes at least one parameter of both a real-time respiratory rate (respiratory rate) and a pulse rate (pulse rate) (or heart rate (heart rate)) of the infusion subject. The pulse rate may be the respiration rate, or the pulse rate, or the respiration rate and the integrated resting pulse of the pulse rate. The third real-time parameter is the real-time noise of the infusion system, mainly the noise generated by the infusion pump 20.
If the second real-time parameter is less than the third preset parameter, the infusion tube 50 and the vein 70 are in a falling state; if the second real-time parameter is less than the fourth preset parameter, the infusion tube 50 forces or even penetrates the vein 70 into the tissue; wherein the third preset parameter is smaller than the fourth preset parameter.
The "the second real-time parameter is smaller than the third preset parameter" means a state in which the second real-time parameter is far lower than the normal parameter so as to be difficult to identify, and the third preset parameter is set according to the actual situation.
The second real-time parameter being smaller than the fourth preset parameter means that the second real-time parameter is obviously reduced compared with the normal parameter, the fourth preset parameter is set according to actual conditions, the fourth preset parameter is smaller than the normal parameter, and the fourth preset parameter is larger than the third preset parameter.
Referring to fig. 3, in this embodiment, the system for monitoring the contact state of an infusion cannula with a vein comprises a sensor 30, wherein the sensor 30 is used for detecting a first real-time parameter representing the real-time fluctuation frequency of the liquid in the infusion tube 50; the controller 40 is in communication with the sensor 30, and the controller 40 is configured to remove a third real-time parameter representing real-time noise in the infusion process according to a first preset parameter representing a static pulse wave of an infusion object, a second preset parameter representing infusion noise, and the first real-time parameter, obtain a second real-time parameter representing the real-time static pulse wave in the infusion process, and determine a contact state of the infusion cannula and the vein according to the second real-time parameter.
Referring to fig. 3, in the present embodiment, the system for monitoring the contact state of the infusion cannula with the vein further includes an infusion tube 50, and the sensor 30 is disposed on the infusion tube 50. The sensor 30 needs to be in close proximity to the infusion cannula into the vein 70 so that venous waves can be detected and sensitivity is improved.
Referring to fig. 3, in the present embodiment, the sensor 30 is a pressure sensor 30, the sensing signal is a pressure signal, and the controller 40 is configured to obtain a venous wave signal according to the pressure signal.
In other embodiments, the sensor 30 is a flow sensor 30, the sensing signal is a flow signal, and the controller 40 is configured to obtain the venous wave signal according to the flow signal.
Referring to fig. 3, in the present embodiment, the infusion monitoring device further includes an infusion pump 20, and the infusion pump 20 is in communication with the second section and is used for supplying liquid to the second section. The infusion pump 20 may be active or passive (e.g., by spring force). The infusion monitoring device is also suitable for use with conventional infusions without infusion pump 20. In other embodiments, the condition of the infusions by gravity may also be monitored.
Specifically, the infusion monitoring device further includes a liquid medicine tank 10, and the liquid medicine tank 10 communicates with the infusion pump 20.
With continued reference to fig. 3, in this embodiment, the infusion pump 20 is in communication with a controller 40, the controller 40 being configured to control the infusion pump 20 in response to the sensor signal. The controller 40 controls the infusion pump 20 to be turned off, and the fluctuation signal of the sensor 30 is mainly pulse wave. The infusion pump 20 is turned on at the expiration of the off time (e.g., seconds). The specific off time is determined by the sampling requirement of the pulse wave, taking the fast fourier transform as an example, when considering the upper limit of the heart rate as times per minute (Hz), the number of sampling points is about 6.4 seconds when the sampling frequency is Hz, and the redundancy is added, 10 seconds can be selected.
After the respiration rate signal and the heart rate signal are taken out, the effectiveness of the respiration rate signal and the heart rate signal is judged through a preset frequency and amplitude threshold value, so that whether the contact state of the infusion catheter/cannula and the vein 70 is normal or not is derived.
In addition, to further optimize information processing, data from other medical devices outside the infusion device, such as the respiratory rate acquired by the heart rate monitor and the heart rate acquired by the electrocardiograph, may be used to verify the accuracy and validity of the quiet pulse wave obtained by the controller 40.
Referring to fig. 3, the embodiment of the invention further provides a system for monitoring the contact state of an infusion cannula with a vein, wherein the system for monitoring the contact state of the infusion cannula with the vein comprises an external device 60 and an infusion monitoring device, the external device 60 is in communication with the controller 40, and the external device 60 is used for detecting a respiratory rate signal or a heart rate signal and outputting the respiratory rate signal or the heart rate signal to the controller 40.
Specifically, the external device 60 includes a heart rate monitor for detecting a heart rate signal, the heart rate monitor being in communication with the controller 40. Heart rate is extracted from the heart rate monitor to correlate against heart rate measured in venous fluctuations.
Specifically, the external device 60 further includes an electrocardiograph that can detect the respiration rate signal.
In this embodiment, the system for monitoring the contact state of the infusion cannula with the vein further includes a user terminal, which is in communication with the controller 40 and is used to display the monitored state sent by the controller 40. Specifically, the user terminal includes a handheld device or console for care, and the handheld device and console are capable of displaying the monitored status sent from the controller 40.
Referring to fig. 1, in this embodiment, the user terminal further includes a display, which is in communication with the controller 40 and is used for displaying the infusion state or the alarm signal. The controller 40 concludes by analyzing the status of the resting pulse to determine the status of the connection of the infusion tube 50 and then locally alarms and intervenes (e.g., pauses the infusion pump 20) or signals to a remote monitoring system.
The method and system for monitoring the contact state between the infusion cannula and the vein 70 provided by the embodiment have at least the following advantages:
the method of monitoring the contact status of the infusion cannula with the vein 70 converts existing manual-based monitoring into immediate and intelligent. The discovery time of manual disconnection or penetration of the infusion cannula is statistically on the order of minutes or even hours. The method of monitoring the contact state of the infusion cannula with the vein 70 can instantly find that the second real-time parameter is far below the normal parameter so as to be difficult to identify; for osmotic conditions, particularly when the infusion tube 50 is pressed or even penetrated into tissue, rapid discovery may be achieved because the magnitude of the resting pulse reaching the flow sensor 30 is significantly reduced.
The sensor 30 may be a flow sensor 30 or a pressure sensor 30. The application range is wide.
The external device 60 is introduced to obtain the first preset parameter and the second preset parameter, and the first preset parameter and the second preset parameter are used as the judgment whether the first real-time parameter is processed in a filtering mode or in a noise generating device closing mode, so that the second real-time parameter is more easily obtained, and the intelligent monitoring of the contact state of the infusion cannula and the vein 70 is conveniently realized.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A method for monitoring the contact state of an infusion cannula with a vein, comprising the steps of:
acquiring a first preset parameter representing a static pulse wave of an infusion object and a second preset parameter representing infusion noise;
acquiring a first real-time parameter representing the real-time fluctuation frequency of the liquid in the infusion tube (50);
removing a third real-time parameter representing real-time noise in the infusion process according to the first preset parameter, the second preset parameter and the first real-time parameter to obtain a second real-time parameter representing real-time static pulse wave in the infusion process; if the difference value between the first preset parameter and the second preset parameter is larger than a first threshold value, filtering the third real-time parameter from the first real-time parameter, and separating out the second real-time parameter; if the difference value between the first preset parameter and the second preset parameter is smaller than a first threshold value, controlling equipment generating noise to be closed, wherein the first real-time parameter is equal to the second real-time parameter;
judging the contact state of the infusion cannula and the vein according to the second real-time parameter; if the second real-time parameter is smaller than the third preset parameter, the infusion tube and the vein are in a falling-off state; if the second real-time parameter is smaller than the fourth preset parameter, the infusion tube presses or even penetrates through the vein to enter the tissue; wherein the third preset parameter is smaller than the fourth preset parameter.
2. The method for monitoring the contact state of an infusion cannula with a vein according to claim 1, wherein:
if the difference between the first preset parameter and the second preset parameter is greater than a first threshold, filtering the third real-time parameter from the first real-time parameter, and separating the second real-time parameter includes:
extracting the second real-time parameter from the first real-time parameter by means of digital signal processing filtering.
3. The method for monitoring the contact state of an infusion cannula with a vein according to claim 1, wherein:
and if the difference between the first preset parameter and the second preset parameter is smaller than a first threshold, controlling the equipment generating noise to be closed, wherein the step of enabling the first real-time parameter to be equal to the second real-time parameter comprises the following steps of:
and the noise generating device is started after being closed for a preset time.
4. The method for monitoring the contact state of an infusion cannula with a vein according to claim 1, wherein:
the noise generating device is an infusion pump (20).
5. The method for monitoring the contact state of an infusion cannula with a vein according to any one of claims 1 to 4, wherein:
the first preset parameters are obtained by measuring the infusion object through a first measuring device, and the second preset parameters are obtained by measuring the noise generating device through a second measuring device.
6. The method for monitoring the contact state of an infusion cannula with a vein according to any one of claims 1 to 4, wherein:
obtaining the first preset parameters through the statistical parameters of the existing transfusion objects or manually measuring the transfusion objects; and calculating the second preset parameter through the infusion rate of the model.
7. The system for monitoring the contact state of the infusion cannula and the vein is characterized by comprising a sensor (30) and a controller (40), wherein the sensor (30) is used for detecting and obtaining a first real-time parameter representing the real-time fluctuation frequency of liquid in the infusion tube (50); the controller (40) is in communication with the sensor (30), the controller (40) being adapted to perform the method of monitoring the contact status of an infusion cannula with a vein as claimed in any one of claims 1-6.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4324230A1 (en) * | 1993-07-20 | 1995-01-26 | Lang Volker | Device for monitoring intravenous infusion therapy |
| WO2004068078A1 (en) * | 2003-01-10 | 2004-08-12 | Ho Jinyama | State judging method, and state predicting method and device |
| JP2006263018A (en) * | 2005-03-23 | 2006-10-05 | Hiroshima Industrial Promotion Organization | System and method for monitoring infusion line |
| KR101782930B1 (en) * | 2016-08-16 | 2017-09-28 | 최근욱 | Medical injection set with blood leak prevention fuction |
| CN208301932U (en) * | 2017-07-12 | 2019-01-01 | 南方医科大学 | Intelligent intravenous transfusion device device |
| CN209032393U (en) * | 2017-11-06 | 2019-06-28 | 杨上林 | Intelligent flow monitoring device and system |
| CN110151158A (en) * | 2019-06-21 | 2019-08-23 | 深圳市奋达智能技术有限公司 | A kind of measurement method and device of low-power consumption dynamic and static continuous heart rate |
| CN110639083A (en) * | 2019-10-31 | 2020-01-03 | 滨州职业学院 | Venous transfusion anti-seepage device for operating room nursing |
| CN110665093A (en) * | 2019-09-29 | 2020-01-10 | 英华达（上海）科技有限公司 | Monitoring method and monitoring device for venous transfusion |
| CN113058110A (en) * | 2021-03-17 | 2021-07-02 | 董建成 | Method and system for detecting venous transfusion extravasation |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009122229A1 (en) * | 2008-04-01 | 2009-10-08 | Gambro Lundia Ab | An apparatus and a method for monitoring a vascular access |
| US9597482B2 (en) * | 2012-06-18 | 2017-03-21 | Smart Iv Llc | Apparatus and method for monitoring catheter insertion |
| US10842931B2 (en) * | 2012-12-17 | 2020-11-24 | Board Of Regents Of The University Of Texas System | System of intravenous fluid/medication delivery that employs signature flow amplitudes of frequencies to facilitate the detection of intravenous infiltration |
| ITTO20130523A1 (en) * | 2013-06-26 | 2014-12-27 | Eltek Spa | MEDICAL DEVELOPMENT OF A LOSS OF FLUID ON A SUBJECT |
| US9872633B2 (en) * | 2014-09-29 | 2018-01-23 | Becton, Dickinson And Company | Cannula insertion detection |
| JP6678646B2 (en) * | 2015-03-17 | 2020-04-08 | テルモ株式会社 | Infusion condition detection system |
| CA2981018A1 (en) * | 2016-11-18 | 2018-05-18 | Becton, Dickinson And Company | Use of infrared light absorption for vein finding and patient identification |
| US10272201B2 (en) * | 2016-12-22 | 2019-04-30 | Medtronic Minimed, Inc. | Insertion site monitoring methods and related infusion devices and systems |
-
2022
- 2022-03-01 CN CN202210194775.1A patent/CN114534017B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4324230A1 (en) * | 1993-07-20 | 1995-01-26 | Lang Volker | Device for monitoring intravenous infusion therapy |
| WO2004068078A1 (en) * | 2003-01-10 | 2004-08-12 | Ho Jinyama | State judging method, and state predicting method and device |
| JP2006263018A (en) * | 2005-03-23 | 2006-10-05 | Hiroshima Industrial Promotion Organization | System and method for monitoring infusion line |
| KR101782930B1 (en) * | 2016-08-16 | 2017-09-28 | 최근욱 | Medical injection set with blood leak prevention fuction |
| CN208301932U (en) * | 2017-07-12 | 2019-01-01 | 南方医科大学 | Intelligent intravenous transfusion device device |
| CN209032393U (en) * | 2017-11-06 | 2019-06-28 | 杨上林 | Intelligent flow monitoring device and system |
| CN110151158A (en) * | 2019-06-21 | 2019-08-23 | 深圳市奋达智能技术有限公司 | A kind of measurement method and device of low-power consumption dynamic and static continuous heart rate |
| CN110665093A (en) * | 2019-09-29 | 2020-01-10 | 英华达（上海）科技有限公司 | Monitoring method and monitoring device for venous transfusion |
| CN110639083A (en) * | 2019-10-31 | 2020-01-03 | 滨州职业学院 | Venous transfusion anti-seepage device for operating room nursing |
| CN113058110A (en) * | 2021-03-17 | 2021-07-02 | 董建成 | Method and system for detecting venous transfusion extravasation |
Non-Patent Citations (3)
| Title |
|---|
| KRIZSMA,S.in-situ monitoring of deformation in rapid prototyped injection molds.ADDITIVE MANUFACTURING.2017,第42卷全文. * |
| 奇异值分解法用于MR灌注成像脑血流量估计的仿真研究;马栋敏;李颖;彭川;郭延庆;郭磊;何任杰;饶利芸;;中国生物医学工程学报(第06期);全文 * |
| 注射剂可见异物检测气泡干扰消除方法的研究;郭斌;程佳;谢代梁;黄震威;张永超;;中国计量学院学报(第04期);全文 * |
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