WO2023024826A1

WO2023024826A1 - Control method and system for patient controlled analgesia apparatus

Info

Publication number: WO2023024826A1
Application number: PCT/CN2022/108806
Authority: WO
Inventors: 毛健
Original assignee: 巨翊科技（上海）有限公司
Priority date: 2021-08-27
Filing date: 2022-07-29
Publication date: 2023-03-02
Also published as: CN113679907A; CN113679907B

Abstract

A control method for a patient controlled analgesia apparatus. The control method comprises: counting the instances N₁ of valid signals from among analgesia instruction signals, and counting the instances N₂ of invalid signals from among same; calculating an invalid signal ratio R₁ and a valid signal ratio R₂; respectively performing comparative analysis on the values of R₁ and R₂ with a preset dose adjustment threshold value; and according to a comparison result, adjusting or not adjusting a PCA single dose. A control system of a patient controlled analgesia apparatus. The control system comprises: a preset module, an information receiving module, an information processing module and a medicine delivery module. A PCA apparatus is intelligently adjusted according to a PCA situation of a user.

Description

[Title of the invention established by the ISA under Rule 37.2] A control method and system for a patient-controlled analgesia device

technical field

The invention relates to the technical field of medical devices, in particular to a control method and system for a patient-controlled analgesia device.

Background technique

At present, electronic infusion pumps used for infusion of analgesic drugs generally have the function of PCA (Patient Controlled Analgesia, patient-controlled analgesia). This function only activates the PCA component when the patient feels pain to achieve a single infusion. It is used to alleviate the insufficient analgesia caused by individual differences.

However, in the process of using the existing PCA system, the single infusion volume of each activation of the PCA by the patient is set and often fixed. However, with the progress of the treatment process or individual patient differences, the patient's demand for a single infusion volume in different time periods changes, which may increase or decrease relative to the initial value; in addition, due to the effectiveness of the drug It takes a certain amount of time. Before the drug takes effect, although the PCA infusion drug has been activated, the patient will continue to activate the PCA system due to pain because the drug has not yet taken effect, which will cause the patient to be dangerous due to overdose of drug infusion within a certain period of time.

Contents of the invention

In order to solve the above disadvantages, the present invention provides a control method and system of a patient-controlled analgesia device.

Concrete technical scheme of the present invention is as follows:

The first aspect of the present invention provides a control method of a patient-controlled analgesia device, including:

Receive the user's analgesic instruction signal;

Count the number of effective signals N ₁ and the number of invalid signals N ₂ in the analgesic command signal, and calculate the theoretical maximum effective number N ₃ ;

Calculating the invalid signal rate R ₁ and the effective signal rate R ₂ , the R ₁ =N ₂ /N ₁ , the R ₂ =N ₁ /N ₃ ;

The values of R ₁ and R ₂ were compared and analyzed with the preset dose adjustment thresholds, and the PCA single dose was adjusted or not adjusted according to the comparison results.

The second aspect of the present invention provides a control method of a patient-controlled analgesia device, including:

Step S1, obtaining the initial single dose of PCA, the total dose of PCA and the single locking time;

Step S2, obtaining the setting parameters of single dose fixed cycle, single dose adjustment upper limit, single dose increase threshold, single dose increase rate, single dose decrease threshold, single dose decrease rate, analysis and calculation interval time;

Step S3, receiving an analgesic command signal from the user;

Step S4, counting the number of effective signals N ₁ and the number of invalid signals N ₂ within a single dose fixed period, and calculating the theoretical maximum effective number N ₃ within a single dose fixed period, the theoretical maximum effective number N ₃ = Single dose fixed cycle/single lock time;

Step S5, calculating the invalid signal rate R ₁ and the effective signal rate R ₂ according to N ₁ , N ₂ , and N ₃ , the R ₁ =N ₂ /N ₁ , the R ₂ =N ₁ /N ₃ ;

Step S6, comparing and analyzing the values of _R1 and _R2 with the single dose increase threshold and the single dose decrease threshold respectively:

(i) If N ₁ >0, and R ₁ >single dose increase threshold, R ₂ >single dose decrease threshold, enter the next single dose fixed cycle, and adjust the next single dose according to the single dose increase rate A single dose of PCA within a dose-fixed cycle;

(ii) If R ₁ <single dose increase threshold, effective rate R ₂ <single dose reduction threshold, enter the next single dose fixed cycle, and adjust the next single dose fixed cycle according to the single dose reduction rate A single dose of PCA;

(iii) If it is not the case of (i) (ii), no adjustment is made, and after analyzing and calculating the interval time, repeat step S4, step S5, and step S6.

If the variation of the PCA single dose in the next single dose fixed cycle in (i) or (ii) is less than 0.5ml compared with the PCA single dose in the previous single dose fixed cycle, then 0.5ml The amount of ml is adjusted.

Preferably, it also includes uploading, displaying and storing the adjustment records in each single dose fixed period in the terminal.

Preferably, the single locking time is shorter than the single dose fixed period.

A third aspect of the present invention provides a control system for a patient-controlled analgesia device, including:

A preset module, used to preset PCA dose and dose adjustment parameters;

An information receiving module, configured to receive an analgesic instruction signal from a user;

The information processing module is used to process the user's analgesic command signal, compare the processing result with the preset PCA dose adjustment parameter, and adjust or not adjust the single PCA dose according to the comparison result;

The medicine delivery module is used for delivering medicine to the patient.

A fourth aspect of the present invention provides a control system for a patient-controlled analgesia device, including:

The first preset module is used to set the initial single dose of PCA, the total dose of PCA and the single locking time;

The second preset module is used to set a single dose fixed cycle, a single dose adjustment upper limit, a single dose increase threshold, a single dose increase rate, a single dose decrease threshold, a single dose decrease rate, and an analysis and calculation interval module;

The drug delivery module is used to deliver the drug to the patient;

The first information processing module is used to process the received analgesic command signal, and divide the user's analgesic command signal into a valid signal and an invalid signal;

The second information processing module is used to count the number of effective signals N ₁ and the number of invalid signals N ₂ in a single dose fixed period, and calculate the theoretical maximum effective number N ₃ in a single dose fixed period, and then according to N ₁ , N ₂ , N ₃ calculate the invalid signal rate R ₁ and the effective signal rate R ₂ , and conduct a comparative analysis with the single dose increase threshold and single dose decrease threshold, and adjust or not adjust the PCA single dose according to the comparison results.

Preferably, the control system further includes a user terminal module for receiving, displaying, and storing the adjustment records of each single dose within a fixed period.

3. Beneficial effect

Compared with the prior art, the technical solution provided by the invention has the following beneficial effects:

(1) The control method of the patient self-controlled analgesia device of the present invention calculates the theoretical maximum effective number N ₃ by counting the number of effective signals N ₁ and the number of invalid signals N ₂ in the analgesic command signal; calculates the rate of invalid signals R ₁ and effective rate signal rate R ₂ , compare and analyze the values of R ₁ and R ₂ with the preset dose adjustment thresholds, and automatically adjust or not adjust the PCA single dose according to the comparison results. Thereby satisfying the change of the single infusion amount of the patient for different time periods.

(2) The control system of the patient-controlled analgesic device of the present invention can set the word lock time, which ensures that the patient decides whether to press the button to request the drug after the drug takes effect, and avoids the patient feeling pain because the drug does not take effect and thus repeatedly pressing The PCA dosing button requests dosing with the risk of overdose of the drug infused into the patient within a short period of time.

(3) The setting of the interval time of the control system of the patient-controlled analgesia device of the present invention enables the system to respond to the analgesic command signal in time and make timely adjustments to meet the needs of the patient. It also avoids the continuous calculation of the system and avoids unnecessary waste.

Description of drawings

FIG. 1 is a schematic diagram of a control method of a patient-controlled analgesia device in an embodiment of the present invention.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings, in which several embodiments of the present invention are shown, however, the present invention can be realized in many different forms, and is not limited to this text The described embodiments are, on the contrary, provided so that the disclosure of the invention will be thorough.

Example 1

A control system of a patient-controlled analgesia device in this embodiment includes a preset module, an information receiving module, an information processing module, and a drug delivery module.

The preset module is used for the medical staff to set the single dose of medicine infused by the patient-controlled analgesia device each time; and set the parameters for controlling and adjusting the single dose of medicine.

The information receiving module is used to receive the user's analgesic instruction signal; the input method of the patient's analgesic instruction signal can be a pressing method or a voice control method.

The information processing module is used to process the user's analgesic instruction signal received by the information receiving module, and compare the processing result with the preset parameters for controlling and adjusting the single dose of the drug, and adjust or not adjust the PCA follow-up according to the comparison result. A single dose administered.

The medicine delivery module is used for delivering medicine to the patient.

Example 2

A control system of a patient-controlled analgesia device in this embodiment includes a first preset module, a second preset module, an information receiving module, a first information processing module, a second information processing module, and a drug delivery module.

The first preset module includes a PCA initial single dose setting module, a PCA total dose setting module, and a single locking time setting module.

The PCA initial single dose setting module is used for medical personnel to set a single dose of medicine for each infusion;

The PCA total dose setting module is used for medical personnel to set the upper limit of the total dose of medicine required by the patient during the entire treatment process, so that the total dose of medicine delivered by the medicine delivery module will not exceed the upper limit of the total dose of medicine that the patient can bear, thereby avoiding the upper limit of the total dose of medicine that the patient can bear during the entire treatment process. Risk of drug overdose during treatment.

The single locking time setting module is used for medical personnel to set a single locking time. Since the medicine takes a certain amount of time to take effect after being infused into the human body, before the medicine takes effect, the patient may feel pain because the medicine does not take effect and thus often A single press of the PCA dosing button to request a dose poses a risk of overdose being infused into the patient shortly before the drug takes effect. The single locking time is set by the medical staff according to the effective time of the drug, which is generally not less than the effective time of the drug. In a single lock time period, only the patient presses the drug delivery button for the first time, the drug delivery module will deliver the drug, and the patient's second and subsequent multiple presses of the drug delivery button will not cause the drug delivery module to deliver the drug to the patient. After exceeding the single lock time period, the patient presses the drug delivery button again to make the drug delivery module deliver the medicine to the patient, thereby entering the next single lock time period. Pressing the dosing button a few times will not cause the drug delivery module to deliver the drug to the patient. and so on.

The setting of a single lock time ensures that the patient decides whether to press the button to request the drug after the drug takes effect, and avoids the short time caused by pressing the PCA drug delivery button multiple times to request the drug because the patient feels pain because the drug does not take effect Risk of overdose of the drug infused into the patient.

The second preset module includes a single dose fixed period setting module, a single dose adjustment upper limit setting module, a single dose increase threshold setting module, a single dose increase rate setting module, a single dose reduction threshold setting module, a single dose Dose reduction rate setting module, analysis and calculation interval module.

The single dose fixed cycle setting module is used for medical personnel to set a single dose fixed cycle. The PCA initial single dose setting module of the first preset module can set an initial single administration dose. However, with the progress of the treatment process or due to individual patient differences, the patient's demand for a single infusion volume in different time periods thereafter may change, which may increase or decrease relative to the initial value. In order to solve this problem, the present invention sets a single dose fixed cycle through a single dose fixed cycle setting module, and every time the time of a single dose fixed cycle is passed, the single dose in the next single dose fixed cycle is performed. auto-adjust. The single-dose fixed period is longer than the single-lock time, that is, a single-dose fixed period includes at least one single-lock time period.

The single dose adjustment upper limit setting module is used for medical staff to set the single dose adjustment upper limit, so as to ensure that the single dose in the next single dose fixed cycle does not exceed an upper limit value and ensure the safety of patients.

The single dose increase threshold setting module is used for medical personnel to set a single dose increase threshold, and the single dose increase threshold is used to compare with the analysis results of the second information processing module, so as to determine the next single dose fixed cycle Single dose adjustment method within.

The single dose increase rate setting module is used for medical personnel to set the single dose increase rate, and the single dose increase rate is used to calculate the single dose in the next single dose fixed period, that is, if the next single dose If a single dose needs to be increased in a fixed dose cycle, the increased amount of a single dose is obtained by multiplying the single dose in the last fixed cycle of a single dose by the set single dose increase rate.

The single dose reduction threshold setting module is used for medical personnel to set a single dose increase threshold, and the single dose reduction threshold is used to compare with the analysis results of the second information processing module, so as to determine the next single dose fixed cycle Single dose adjustment method within.

The single dose reduction rate setting module is used for medical staff to set the single dose reduction rate, and the single dose reduction rate is used to calculate the single dose in the next single dose fixed cycle, that is: if the next single dose If the single dose in the dose fixed cycle needs to be reduced, the reduction of the single dose is obtained by multiplying the single dose in the previous single dose fixed cycle by the set single dose reduction rate.

The analysis and calculation interval module is used to set the interval time for the second information processing module to statistically process the analgesic instruction signal. The setting of the interval time can enable the system to respond to the analgesic command signal in time and make timely adjustments to meet the needs of patients. It also avoids the continuous calculation of the system and avoids unnecessary waste.

The information receiving module is used for receiving the patient's analgesia instruction signal. The input mode of the patient's analgesic command signal can be a pressing mode or a voice control mode.

The drug delivery module is used to deliver drugs to a patient.

The first information processing module is used to process the received analgesic instruction signal, judge whether the analgesic instruction signal is a valid signal or an invalid signal, and if it is a valid signal, control the drug delivery module to deliver the drug; if it is an invalid signal, Then the drug delivery module does not deliver the drug;

The effective signal refers to the analgesic command signal received for the first time, and the first analgesic command signal received again after a single lock-in time since receiving the last valid signal; other accepted analgesic command signals The signals are all invalid signals.

The second information processing module is used to count the number of effective signals N ₁ and the number of invalid signals N ₂ within a fixed period of a single dose, and calculate the theoretical maximum effective number N ₃ within a fixed period of a single dose. Theoretical maximum effective times N ₃ =single dose fixed period/single locking time.

Then calculate the invalid signal rate R ₁ and the effective signal rate R ₂ according to N ₁ , N ₂ , and N ₃ , the invalid signal rate R ₁ =N ₂ /N ₁ , the effective signal rate R ₂ =N ₁ / N ₃ .

The values of R ₁ and R ₂ were compared with the single dose increase threshold and the single dose decrease threshold respectively:

(iii) If it is not the case of (i) (ii), no adjustment is made, and after analyzing and calculating the interval time, repeat step S5, step S6, and step S7.

Further, the variation of the PCA single dose in the next single dose fixed cycle in (i) or (ii) is less than 0.5ml compared with the PCA single dose in the previous single dose fixed cycle, Adjust according to the amount of 0.5ml.

Example 3

Compared with Embodiment 2, the control system of a patient-controlled analgesia device in this embodiment further includes a user terminal module, which is used to receive, display, and store the adjustment records of each single dose within a fixed period.

Example 4

Referring to accompanying drawing 1, a control method of a patient-controlled analgesia device in this embodiment includes:

Step S3, receiving an analgesic command signal from the user;

Step S4, judging whether the user's analgesic instruction signal is a valid signal or an invalid signal; if it is a valid signal, control the drug delivery module to deliver medicine; if it is an invalid signal, the drug delivery module does not deliver medicine;

Step S5, counting the number of effective signals N ₁ and the number of invalid signals N ₂ within a single dose fixed period, and calculating the theoretical maximum effective number N ₃ within a single dose fixed period, the theoretical maximum effective number N ₃ = Single dose fixed cycle/single lock time;

Step S6, calculate invalid signal rate R ₁ and effective signal rate R ₂ according to N ₁ , N ₂ , N ₃ , said R ₁ =N ₂ /N ₁ , said R ₂ =N ₁ /N ₃ ;

Step S7, comparing and analyzing the values of _R1 and _R2 with the single dose increase threshold and the single dose decrease threshold respectively:

Preferably, the variation of the PCA single dose in the next single dose fixed cycle in (i) or (ii) compared with the PCA single dose in the previous single dose fixed cycle is less than 0.5ml, Adjust according to the amount of 0.5ml.

Example 5

An application example of a control system of a patient-controlled analgesia device in this embodiment includes:

On the first preset module, the medical personnel set the single dose of an anesthetic drug per infusion as 3ml, the upper limit of the total dose of the drug as 80ml, and the single locking time as 10min.

On the second preset module, the medical personnel set the single dose fixed cycle as 2h, the single dose adjustment upper limit 6ml, the single dose increase threshold 40%, the single dose increase rate 20%, the single dose decrease threshold 40%, and the single dose increase threshold 40%. The dose reduction rate was 20%, and the analysis and calculation interval was 5 minutes.

After setting the above parameters, start timing and enter the first single dose fixed cycle, that is, within the next 2 hours, if the patient's analgesic command signal is a valid signal, the dose of the drug delivered to the patient by the drug delivery module is set by the medical staff 3ml.

At 20 minutes into the first single-dose fixed cycle, the patient presses the PCA administration button to give the first analgesic instruction signal, which is a valid signal. At this time, the drug delivery module delivers 3ml of drug to the patient, and at the same time the next 10 minutes Entering a single locking time period, that is, within the next 10 minutes, the analgesic command signals given by the patient pressing the PCA drug delivery button are all invalid signals, and the drug delivery module will not deliver drugs to the patient. After 10 minutes, the patient presses the PCA drug delivery button again to give an analgesic command signal, which is a valid signal at this time, and the drug delivery module will deliver 3ml of drug to the patient, and at the same time enter the single lock time period again in the next 10 minutes. analogy.

After the first single dose fixed period of 2 hours, the second information processing module starts to count the number of valid signals and invalid signals within the first single dose fixed period of 2 hours. According to the statistics, there are 4 valid signals and 2 invalid signals signal, and calculate the theoretical maximum effective number of times 12 times at the same time, that is, the theoretical maximum effective number = 2h/10min.

Further calculate the invalid signal rate R ₁ =N ₂ /N ₁ =2/4=0.5, the effective signal rate R ₂ =N ₁ /N ₃ =4/12=0.33,

Compare and analyze the calculated values of R ₁ (0.5) and R ₂ (0.33) with the set single dose increase threshold (0.4) and single dose decrease threshold (0.4), and the adjustment conditions (i)(ii) are not satisfied , it will not enter the next single dose fixed cycle, and no adjustment will occur. From now until 5 minutes (interval of analysis and calculation), the effective signal sent by the patient, the dose of medicine delivered to the patient by the medicine delivery module is still 3ml.

After an analysis and calculation interval of 5 minutes, the second information processing module re-counts the number of valid signals within the last 2 hours (that is, the 2 hours from 5 minutes after entering the first single dose fixed cycle to 5 minutes after the end of the first single dose fixed cycle) and the number of invalid signals, further calculate the invalid signal rate R ₁ and the effective rate signal rate R ₂ , and conduct a comparative analysis with the set single dose increase threshold and single dose decrease threshold, if the adjustment condition (i)(ii) is still not met ), it will not enter the next single dose fixed cycle, and no adjustment will occur. After that, after every 5 minutes of analysis and calculation interval, the second information processing module re-counts the number of valid signals and the number of invalid signals in the last 2 hours, and further calculates the invalid signal rate R ₁ and the effective signal rate R ₂ , and compares them with the set single The dose increase threshold and the single dose decrease threshold are comparatively analyzed until the whole condition (i)(ii) is met.

2.5 hours after the start of the first single-dose fixed cycle, the next single-dose fixed cycle has not entered, and after an analysis and calculation interval of 5 minutes, the second information processing module counts the last 2 hours again (that is, enters the first single-dose fixed cycle). The number of valid signals and the number of invalid signals within 2h) from the beginning of the 35min of the fixed dose cycle to the 35min after the end of the first single dose fixed cycle, according to the statistics, there are 6 valid signals and 3 invalid signals.

Further calculate the invalid signal rate R ₁ =N ₂ /N ₁ =3/6=0.5, the effective signal rate R ₂ =N ₁ /N ₃ =6/12=0.5,

Compare and analyze the calculated values of R ₁ (0.5) and R ₂ (0.5) with the set single dose increase threshold (0.4) and single dose decrease threshold (0.4), and if the adjustment condition (i) is met, proceed to the next step A single dose fixed cycle, and at the same time adjust the PCA single dose in the next single dose fixed cycle according to the single dose increase rate (20%); that is, in the next 2h single dose fixed cycle, if the patient’s analgesic instruction If the signal is an effective signal, the dosage of the medicine delivered by the medicine delivery module to the patient is adjusted to 3.6ml. After another 2 hours, the second information processing module starts to count the number of valid signals and invalid signals in the last 2 hours, further calculates the invalid signal rate R ₁ and the effective signal rate R ₂ , and compares them with the set single dose increase threshold, single dose Do a comparative analysis of the dose reduction threshold, and make corresponding adjustments according to the adjustment conditions (i)(ii)(iii). and so on.

Example 6

Compared with Embodiment 5, the application of the control system of a patient-controlled analgesia device in this embodiment also includes uploading, displaying, and storing the adjustment records in the fixed period of each single dose in the terminal.

Example 7

The application of the control system of a patient-controlled analgesia device in this embodiment, compared with Embodiment 5, is different in that the single dose increase rate is set at 10%, which is adjusted according to the single dose increase rate (10%) If the variation of the single dose of PCA in a fixed cycle of single dose is less than 0.5ml, it is adjusted according to the amount of 0.5ml, that is, the single dose of PCA in the next fixed cycle of single dose is 3.5ml.

The above-described embodiment only expresses a certain implementation mode of the present invention, and its description is relatively specific and detailed, but it should not be interpreted as limiting the patent scope of the present invention; it should be pointed out that for those of ordinary skill in the art That is to say, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention; therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims

A control method for a patient-controlled analgesia device, characterized in that it includes:

Receive the user's analgesic instruction signal;

Count the number of effective signals N 1 and the number of invalid signals N 2 in the analgesic command signal, and calculate the theoretical maximum effective number N 3 ;

Calculating the invalid signal rate R 1 and the effective signal rate R 2 , the R 1 =N 2 /N 1 , the R 2 =N 1 /N 3 ;

The values of R 1 and R 2 were compared and analyzed with the preset dose adjustment thresholds, and the PCA single dose was adjusted or not adjusted according to the comparison results.
A control method for a patient-controlled analgesia device, characterized in that it includes:

Step S1, obtaining the initial single dose of PCA, the total dose of PCA and the single locking time;

Step S2, obtaining the setting parameters of single dose fixed cycle, single dose adjustment upper limit, single dose increase threshold, single dose increase rate, single dose decrease threshold, single dose decrease rate, analysis and calculation interval time;

Step S3, receiving an analgesic command signal from the user;

Step S4, counting the number of effective signals N 1 and the number of invalid signals N 2 within a single dose fixed period, and calculating the theoretical maximum effective number N 3 within a single dose fixed period, the theoretical maximum effective number N 3 = Single dose fixed cycle/single lock time;

Step S5, calculating the invalid signal rate R 1 and the effective signal rate R 2 according to N 1 , N 2 , and N 3 , the R 1 =N 2 /N 1 , the R 2 =N 1 /N 3 ;

Step S6, comparing and analyzing the values of R1 and R2 with the single dose increase threshold and the single dose decrease threshold respectively:

(i) If N 1 >0, and R 1 >single dose increase threshold, R 2 >single dose decrease threshold, enter the next single dose fixed cycle, and adjust the next single dose according to the single dose increase rate A single dose of PCA within a dose-fixed cycle;

(ii) If R 1 <single dose increase threshold, effective rate R 2 <single dose reduction threshold, enter the next single dose fixed cycle, and adjust the next single dose fixed cycle according to the single dose reduction rate A single dose of PCA;

(iii) If it is not the case of (i) (ii), no adjustment is made, and after analyzing and calculating the interval time, repeat step S4, step S5, and step S6.
The control method of the patient-controlled analgesia device according to claim 2, characterized in that: the PCA single dose in the next single dose fixed cycle in (i) or (ii) is compared with the previous single dose If the variation of the single dose of PCA within the fixed period of each dose is less than 0.5ml, it should be adjusted according to the amount of 0.5ml.
The control method of the patient-controlled analgesia device according to claim 2 or 3, further comprising uploading, displaying and storing the adjustment records in the fixed period of each single dose in the terminal.
The control method of the patient-controlled analgesia device according to claim 2 or 3, characterized in that: the single locking time is shorter than the single dose fixed period.
A control system for a patient-controlled analgesia device, characterized in that it includes:

A preset module, used to preset PCA dose and dose adjustment parameters;

An information receiving module, configured to receive an analgesic instruction signal from a user;

The information processing module is used to process the user's analgesic command signal, compare the processing result with the preset PCA dose adjustment parameter, and adjust or not adjust the single PCA dose according to the comparison result;

The medicine delivery module is used for delivering medicine to the patient.
A control system for a patient-controlled analgesia device, characterized in that it includes:

The first preset module is used to set the initial single dose of PCA, the total dose of PCA and the single locking time;

The second preset module is used to set a single dose fixed cycle, a single dose adjustment upper limit, a single dose increase threshold, a single dose increase rate, a single dose decrease threshold, a single dose decrease rate, and an analysis and calculation interval module;

An information receiving module, configured to receive an analgesic instruction signal from a user;

The drug delivery module is used to deliver the drug to the patient;

The first information processing module is used to process the received analgesic command signal, and divide the user's analgesic command signal into a valid signal and an invalid signal;

The second information processing module is used to count the number of effective signals N 1 and the number of invalid signals N 2 in a single dose fixed period, and calculate the theoretical maximum effective number N 3 in a single dose fixed period, and then according to N 1 , N 2 , N 3 calculate the invalid signal rate R 1 and the effective signal rate R 2 , and conduct a comparative analysis with the single dose increase threshold and single dose decrease threshold, and adjust or not adjust the PCA single dose according to the comparison results.
The control system of the patient-controlled analgesia device according to claim 6, further comprising a user terminal module for receiving, displaying, and storing each single dose adjustment record within a fixed period.