WO2016180010A1 - 输液器内阻塞压力释放方法、装置和输液泵 - Google Patents

输液器内阻塞压力释放方法、装置和输液泵 Download PDF

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Publication number
WO2016180010A1
WO2016180010A1 PCT/CN2015/096634 CN2015096634W WO2016180010A1 WO 2016180010 A1 WO2016180010 A1 WO 2016180010A1 CN 2015096634 W CN2015096634 W CN 2015096634W WO 2016180010 A1 WO2016180010 A1 WO 2016180010A1
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WO
WIPO (PCT)
Prior art keywords
signal
infusion
liquid
code wheel
sensor
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PCT/CN2015/096634
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English (en)
French (fr)
Inventor
谭明
黎图韵
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深圳市科曼医疗设备有限公司
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Publication of WO2016180010A1 publication Critical patent/WO2016180010A1/zh

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Classifications

    • 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
    • A61M5/142—Pressure infusion, e.g. using pumps
    • 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
    • A61M5/16804—Flow controllers
    • 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
    • A61M5/16877—Adjusting flow; Devices for setting a flow rate
    • 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
    • A61M5/16886—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 for measuring fluid flow rate, i.e. flowmeters
    • 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
    • A61M5/172—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 electrical or electronic
    • 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
    • A61M2005/16863—Occlusion detection
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/18—General characteristics of the apparatus with alarm

Definitions

  • the invention relates to the technical field of medical instruments, in particular to a method, a device and an infusion pump for blocking pressure release in an infusion set.
  • the infusion pump is a kind of intelligent instrument that can accurately control the infusion speed and the infusion volume, and can alarm the abnormal situation such as air bubbles, air liquid and infusion tube blockage and automatically cut off the infusion path. It is often used in situations where strict control of infusion volume and dose is required, such as application of booster drugs, antiarrhythmic drugs, intravenous infusion of infants or intravenous anesthesia.
  • the infusion set may be blocked. If the infusion pump continues to infuse, because the infusion set material itself has elastic flexibility, the liquid inside the infusion set will accumulate and increase until the internal fluid pressure reaches the alarm threshold, triggering the blocking alarm, stopping the infusion, and issuing a corresponding alarm.
  • the pump body will block the infusion set and cut off the liquid flow in the infusion set, so that the amount and pressure of the liquid in the infusion tube between the infusion pump and the infusion set block remain unchanged.
  • the way to handle the infusion obstruction is generally to check the infusion set.
  • the infusion set When the infusion set is bent or pressed, the infusion set is straightened or removed, so that the infusion line is unblocked. Since the accumulated liquid in the blocked part of the infusion set will generate a certain pressure, when the infusion line is unblocked, the accumulated liquid in the blocked part of the infusion set will be directly input into the human body in an instant.
  • the drugs used clinically for the infusion pump are likely to cause physical discomfort when injected into the human body in an instant, and the instantaneous injection of some drugs may even cause harm to the patient. How to effectively prevent the accumulated liquid in the infusion set from being injected into the human body in a hazard, and improving the safety of the infusion is a technical problem that needs to be solved urgently.
  • a method of releasing pressure in an infusion set comprising:
  • the method further comprises:
  • the method further includes:
  • the difference between the total amount of the liquid and the amount of the released liquid is calculated to obtain the actual infusion amount.
  • the step of identifying whether the operating state of the infusion pump is a positive infusion state comprises:
  • the sensor comprising a first sensor and a second sensor, the code wheel comprising a first code wheel and a second code wheel, the first sensor and the first Corresponding to the code wheel, the second sensor corresponds to the second code wheel, the first sensor outputs a first signal, and the second sensor outputs a second signal;
  • the operating state of the identification infusion pump further includes a pressure release state, and before the step of releasing the occlusion liquid in the infusion set, the method further includes:
  • the step of identifying whether the operating state of the infusion pump is a pressure release state comprises:
  • the code disc has a plurality of notches, the number of notches of the first code disc is an integer multiple of the number of gaps of the second code disc, or the number of gaps of the second code disc is An integer multiple of the number of gaps of the first code wheel. If the first sensor detects the gap of the first code wheel, the first signal is output, and if the second sensor detects the gap of the second code wheel, the output is valid. The second signal.
  • the notched line of the first code wheel is aligned with the notched edge of the second code wheel, or the notched line of the second code wheel is aligned with the notched edge of the first code wheel.
  • An infusion set blocking pressure release device comprising:
  • An identification module for identifying whether an operating state of the infusion pump is a positive infusion state
  • the judging module is configured to determine whether the blocking pressure generated by the blocking liquid in the infusion device is greater than or equal to the pressure alarm threshold if the infusion pump is recognized as the positive infusion state; if yes,
  • a release module for releasing a blocking liquid in the infusion set
  • the determining module is further configured to determine whether the blocking pressure is less than or equal to a pressure release threshold, or whether the amount of liquid that the blocking liquid has released is greater than or equal to a liquid release threshold; if yes,
  • the stop module is also for stopping the release of the occlusion liquid.
  • the apparatus further includes:
  • Obtaining a module configured to acquire a total amount of liquid that has been input into the infusion set after stopping the positive infusion; and acquiring the amount of the released liquid after stopping the release of the blocking liquid;
  • a calculation module configured to calculate a difference between the total amount of the liquid and the amount of the released liquid, to obtain an actual infusion amount.
  • the identification module comprises:
  • a receiving unit configured to receive a signal output by the sensor when detecting a motion state of the code wheel, the sensor comprising a first sensor and a second sensor, the code wheel comprising a first code wheel and a second code wheel, the first sensor Corresponding to the first code wheel, the second sensor corresponds to the second code wheel, the first sensor outputs a first signal, and the second sensor outputs a second signal;
  • a determining unit configured to determine whether the second signal is invalid when the first signal is invalid; if yes, determining whether the second signal is valid when the first signal is invalid; if yes, determining the first Whether the second signal is valid when the signal is valid; if yes, further determining whether the second signal is invalid when the first signal is valid.
  • the operating state of the identification infusion pump further includes a pressure release state
  • the identification module is further configured to identify whether the operating state of the infusion pump is before releasing the blocking liquid in the infusion set In the state of pressure release, if so, the step of releasing the occlusion liquid in the infusion set is performed.
  • the identifying module is further configured to determine whether the second signal is invalid when the first signal is invalid; if yes, determine again whether the second signal is invalid when the first signal is valid; If yes, it is determined again whether the second signal is valid when the first signal is valid; if yes, it is further determined whether the second signal is valid when the first signal is invalid.
  • An infusion pump comprising: a first code wheel, a second code wheel, a first sensor and a second sensor, wherein the first sensor corresponds to the first code wheel and outputs a first signal, the second The sensor corresponds to the second code wheel, and outputs a second signal, wherein the first code wheel and the second code wheel respectively form a gap, and the number of gaps of the first code wheel is the number of gaps of the second code wheel An integer multiple, or the number of gaps of the second code wheel is an integer multiple of the number of gaps of the first code wheel.
  • the valid first signal is output, if the first sensor detects the gap of the first code wheel, the valid first signal is output, if the second sensor detects the gap of the second code wheel, and outputs a valid second signal, and identifies an operating state of the infusion pump according to the first signal and the second signal.
  • the notched line of the first code wheel is aligned with the notched edge of the second code wheel, or the notched line of the second code wheel is aligned with the notched edge of the first code wheel.
  • the above-mentioned infusion set blocking pressure release method, device and infusion pump when the infusion pump is in the forward infusion state, if the blocking pressure generated by the blocking liquid in the infusion set is greater than or equal to the pressure alarm threshold, the positive infusion is stopped, effectively preventing the infusion.
  • the liquid continues to be fed into the infusion set.
  • the occlusion liquid in the infusion set is released after the infusion is stopped, and if the occlusion pressure is less than or equal to the pressure release threshold or the amount of liquid that has blocked the release of the liquid is greater than or equal to the liquid release threshold, the release of the occlusion liquid is stopped.
  • the blocking pressure in the infusion device is released, thereby effectively avoiding the damage caused by the blocked part of the infusion set being injected into the human body instantaneously, and whether the infusion set can be effectively prevented from being infused, thereby improving the safety of the infusion.
  • FIG. 1 is a flow chart of a method for releasing a blocking pressure in an infusion set in an embodiment
  • FIG. 2 is a flow chart of a method for releasing a blocking pressure in an infusion set in another embodiment
  • 3-1 is a schematic structural diagram of a code wheel in an embodiment
  • Figure 3-2 is a schematic structural view of an infusion pump in an embodiment
  • Figure 4 is a timing diagram of signals in a forward infusion state in one embodiment
  • Figure 5 is a timing diagram of signals in a pressure release state in one embodiment
  • Figure 6 is a schematic view showing the structure of the occlusion pressure releasing device in the infusion set in one embodiment
  • Figure 7 is a schematic view showing the structure of the occlusion pressure releasing device in the infusion set in still another embodiment
  • FIG. 8 is a schematic structural diagram of an identification module in an embodiment.
  • a method for releasing the pressure in the infusion set is provided, and the method specifically includes:
  • Step 102 Identify whether the operating state of the infusion pump is a positive infusion state; if yes, proceed to step 104, otherwise, stop the operation and issue an error alarm.
  • the infusion pump includes a motor and a pump body. After the infusion pump is powered on, the motor rotates to drive the pump body to move, and the infusion pump starts to run.
  • the operating state of the infusion pump includes a forward infusion state and a reverse infusion state. Since the reverse infusion state may cause harm to the human body to be infused, it is necessary to monitor the operating state of the infusion pump in real time to prevent the infusion pump from entering the reverse infusion state. If it is recognized that the operating state of the infusion pump is the reverse infusion state, the operation is stopped and an error alarm is issued.
  • the photoelectric sensor is used to monitor the running state of the infusion pump in real time.
  • the operating state of the infusion pump can be identified according to the pulse signal output by the photoelectric sensor. If the current movement state of the infusion pump is identified as a positive infusion state, that is, the infusion pump is positively infused into the infusion set, the blocking pressure generated by the blocking fluid in the infusion set is detected.
  • the clogging liquid in the infusion set refers to the accumulated liquid in the obturated part of the infusion set when the infusion set is bent or pressed. Blocking the fluid creates a blocking pressure in the infusion set.
  • Step 104 Determine whether the blocking pressure generated by the blocking liquid in the infusion device is greater than or equal to the pressure alarm threshold; if yes, proceed to step 106, otherwise, continue to maintain the forward infusion state of the infusion pump.
  • the blocking pressure in the infusion device is greater than or equal to the pressure alarm threshold, and if so, the positive infusion is stopped, that is, the motor is stopped, thereby preventing the infusion pump from continuing to input the liquid into the infusion set. Otherwise, continue to maintain the positive rotation of the motor, that is, continue to maintain the positive infusion state of the infusion pump.
  • step 106 the positive infusion is stopped and the occlusion liquid in the infusion set is released.
  • Step 108 Determine whether the blocking pressure is less than or equal to the pressure release threshold, or whether the amount of liquid that has blocked the liquid has been released is greater than or equal to the liquid release threshold; if yes, proceed to step 110, otherwise, continue to release the blocking liquid.
  • the pressure sensor is used to monitor whether the blocking pressure is less than or equal to the pressure release threshold in real time, or the amount of liquid released by the blocking liquid is monitored in real time to release the liquid release threshold greater than or equal to, and if so, the liquid is immediately stopped.
  • step 110 the release of the blocking liquid is stopped.
  • Stop releasing the blocking fluid that is, stop the motor from reversing. This prevents the infusion pump from being in a reverse infusion state due to the continued reversal of the motor, which is harmful to the human body.
  • the operating state of the infusion pump is a positive infusion state; if yes, determining whether the blocking pressure generated by the blocking fluid in the infusion set is greater than or equal to a pressure alarm threshold; if so, stopping the positive infusion, and The occlusion liquid in the infusion set is released; whether the occlusion pressure is less than or equal to the pressure release threshold, or whether the amount of liquid that has blocked the release of the liquid is greater than or equal to the liquid release threshold; if so, the release of the occlusion liquid is stopped.
  • the infusion pump When the infusion pump is in the forward infusion state, if the blocking pressure generated by the blocking fluid in the infusion set is greater than or equal to the pressure alarm threshold, the positive infusion is stopped, effectively preventing the liquid from continuing to be input into the infusion set.
  • the occlusion liquid in the infusion set is released after the infusion is stopped, and if the occlusion pressure is less than or equal to the pressure release threshold or the amount of liquid that has blocked the release of the liquid is greater than or equal to the liquid release threshold, the release of the occlusion liquid is stopped.
  • the blocking pressure in the infusion device is released, thereby effectively avoiding the damage caused by the blocked part of the infusion set being injected into the human body instantaneously, and whether the infusion set can be effectively prevented from being infused, thereby improving the safety of the infusion.
  • the method further comprises: obtaining the total amount of the liquid that has been input into the infusion set; after the step of stopping the release of the blocking liquid, further comprising: obtaining the amount of the released liquid; calculating the liquid The difference between the total amount and the amount of liquid that has been released gives the actual infusion volume.
  • the method for releasing the occlusion pressure in the infusion set in this embodiment specifically includes the following steps:
  • Step 202 Identify whether the operating state of the infusion pump is a positive infusion state; if yes, proceed to step 204, otherwise, continue to monitor the operating state of the infusion pump.
  • Step 204 Determine whether the blocking pressure generated by the blocking liquid in the infusion device is greater than or equal to the pressure alarm threshold; if yes, proceed to step 206, otherwise, continue to maintain the forward infusion state of the infusion pump.
  • step 206 the positive infusion is stopped, and the total amount of liquid that has been input into the infusion set is obtained.
  • step 208 the occlusion liquid in the infusion set is released.
  • Step 210 Determine whether the blocking pressure is less than or equal to the pressure release threshold, or whether the amount of liquid that has blocked the liquid has been released is greater than or equal to the liquid release threshold; if yes, proceed to step 212, otherwise, continue to release the blocking liquid.
  • step 212 the release of the blocking liquid is stopped.
  • step 214 the amount of liquid that has been released is obtained.
  • step 216 the difference between the total amount of liquid and the amount of liquid that has been released is calculated to obtain the actual infusion amount.
  • the amount of the released liquid is recorded, and the actual infusion amount is obtained according to the difference between the total amount of the liquid in the input infusion device and the amount of the released liquid, thereby ensuring the accuracy of the infusion volume.
  • the step of identifying whether the operating state of the infusion pump is a forward infusion state comprises: receiving a signal output by the sensor when detecting a motion state of the code wheel, the sensor comprising a first sensor and a second sensor, the code wheel comprising the first a code wheel and a second code wheel, the first sensor corresponding to the first code wheel, the second sensor corresponding to the second code wheel, the first sensor outputting the first signal, the second sensor outputting the second signal; determining that the first signal is invalid Whether the second signal is invalid; if yes, it is determined again whether the second signal is valid when the first signal is invalid; if yes, it is determined again whether the second signal is valid when the first signal is valid; if yes, further determining that the first signal is valid Whether the signal is invalid.
  • the infusion pump further comprises a pump body, a motor, a code wheel and a sensor.
  • the rotation of the motor drives the pump body to move, the code wheel moves together with the rotation of the motor, and the sensor detects the motion state of the code wheel.
  • the code wheel comprises a first code wheel and a second code wheel
  • the sensor comprises a first sensor and a second sensor.
  • the first sensor is configured to detect a motion state of the first code wheel and output a corresponding first signal.
  • the second sensor is configured to detect a motion state of the second code wheel and output a corresponding second signal.
  • the first sensor and the second sensor may be photosensors.
  • the code disc has a plurality of gaps, the number of gaps of the first code disc is an integral multiple of the number of gaps of the second code disc, or the number of gaps of the second code disc is the number of gaps of the first code disc. Integer multiple, if the first sensor detects the gap of the first code wheel, the valid first signal is output, and if the second sensor detects the gap of the second code wheel, the effective second signal is output. In another embodiment, the notched line of the first code wheel is aligned with the notched edge of the second code wheel, or the notched line of the second code wheel is aligned with the notched edge of the first code wheel.
  • the structure of the code disc is as shown in Figure 3-1.
  • the first code wheel 302 has a notch and the second code wheel 304 has a plurality of notches.
  • the structure of the infusion pump is as shown in FIG. 3-2.
  • the first sensor 306 is disposed under the first code wheel 302 for detecting the motion state of the first code wheel 302 and outputting the first signal.
  • the second sensor 308 is disposed below the second code wheel 304 for detecting the motion state of the second code wheel 304 and outputting a second signal.
  • the number of notches of the second code wheel 304 is an integral multiple of the number of notches of the first code wheel 302, and the notch line of the first code wheel 302 is aligned with the notched edge line of the second code wheel 304.
  • the second code wheel 304 is disposed at a position between the first code wheel 302 and the pump body 310.
  • the first sensor 306 outputs a valid first signal when detecting the gap of the first code wheel 302, and the second sensor 308 outputs a valid second signal when detecting the gap of the second code wheel 304.
  • the pump body 310 is driven by the motor (not shown). During the whole working process of the infusion pump, it is necessary to monitor the running state of the infusion pump in real time to prevent reverse infusion. If neither the first sensor nor the second sensor outputs a valid signal, then the first sensor needs to continue to detect the motion state of the first code wheel and the second sensor needs to continue to detect the motion state of the second code wheel.
  • the first detected valid signal is the second signal output by the second sensor, it indicates that the infusion pump may be in the forward infusion state, in order to further confirm that the infusion pump is currently in the forward infusion state, continue to receive the first signal output of the first sensor and The second signal output by the second sensor.
  • the timing diagrams of the first signal and the second signal are as shown in FIG. 4 .
  • the first signal is invalid and the second signal is invalid, the first signal is invalid and the second signal is valid, the first signal is valid and the second signal is invalid, the first signal is valid and the second signal is invalid.
  • identifying the operating state of the infusion pump further includes a pressure release state, before the step of releasing the blocked fluid in the infusion set, further comprising: identifying whether the operating state of the infusion pump is a pressure release state, and if so, performing the release The step of blocking the liquid in the infusion set.
  • the operating state of the infusion pump further includes a pressure release state.
  • the step of identifying whether the operating state of the infusion pump is a pressure release state comprises: determining whether the second signal is invalid when the first signal is invalid; and if so, determining whether the second signal is invalid when the first signal is valid; If yes, it is determined again whether the second signal is valid when the first signal is valid; if yes, it is further determined whether the second signal is valid when the first signal is invalid.
  • the timing diagrams of the first signal and the second signal are as shown in FIG. 5.
  • the first signal is inactive and the second signal is inactive, the first signal is active and the second signal is inactive, the first signal is active and the second signal is active, the first signal is active and the second signal is active, the first signal is inactive and the second signal is active.
  • the blocking pressure is less than or equal to the pressure release threshold, or if the amount of liquid that has blocked the liquid release is greater than or equal to the liquid release threshold, then the release of the blocking fluid is stopped, preventing reverse infusion, thereby increasing the safety of the infusion.
  • an infusion set occlusion pressure relief device comprising: an identification module 602, a determination module 604, a stop module 606, and a release module 608, wherein:
  • the identification module 602 is configured to identify whether the operating state of the infusion pump is a positive infusion state.
  • the determining module 604 is configured to determine whether the blocking pressure generated by the blocking liquid in the infusion device is greater than or equal to the pressure alarm threshold if the infusion pump is identified as being in the forward infusion state.
  • the stop module 606 stops the positive infusion when the occlusion pressure generated by the occlusion liquid in the infusion set is greater than or equal to the pressure alarm threshold.
  • the release module 608 is configured to release the occlusion liquid in the infusion set.
  • the determining module 604 is further configured to determine whether the blocking pressure is less than or equal to the pressure release threshold, or to block whether the amount of liquid that the liquid has released is greater than or equal to the liquid release threshold.
  • the stop module 606 is further configured to stop releasing the occlusion liquid when the occlusion pressure is less than or equal to the pressure release threshold, or when the amount of liquid that has blocked the release of the liquid is greater than or equal to the liquid release threshold.
  • the infusion pump since the infusion pump is in the forward infusion state, if the blocking pressure generated by the blocked fluid in the infusion set is greater than or equal to the pressure alarm threshold, the positive infusion is stopped, effectively preventing the liquid from continuing to be input into the infusion set.
  • the occlusion liquid in the infusion set is released after the infusion is stopped, and if the occlusion pressure is less than or equal to the pressure release threshold or the amount of liquid that has blocked the release of the liquid is greater than or equal to the liquid release threshold, the release of the occlusion liquid is stopped.
  • the blocking pressure in the infusion device is released, thereby effectively avoiding the damage caused by the blocked part of the infusion set being injected into the human body instantaneously, and whether the infusion set can be effectively prevented from being infused, thereby improving the safety of the infusion.
  • the apparatus further includes: an acquisition module 610 and a calculation module 612, wherein:
  • the obtaining module 610 is configured to acquire the total amount of liquid that has been input into the infusion set after stopping the positive infusion; and obtain the amount of the released liquid after stopping the release of the blocking liquid.
  • the calculating module 612 is configured to calculate a difference between the total amount of liquid and the amount of liquid that has been released, to obtain an actual infusion amount.
  • the amount of the released liquid is recorded, and the actual infusion amount is obtained according to the difference between the total amount of the liquid in the input infusion device and the amount of the released liquid, thereby ensuring the accuracy of the infusion volume.
  • the identification module 602 includes: a receiving unit 602a and a determining unit 604b, wherein:
  • the receiving unit 602a is configured to receive a signal output by the sensor when detecting a motion state of the code wheel, where the sensor includes a first sensor and a second sensor, the code wheel includes a first code wheel and a second code wheel, and the first sensor and the first code wheel Correspondingly, the second sensor corresponds to the second code wheel, the first sensor outputs a first signal, and the second sensor outputs a second signal.
  • the determining unit 604b is configured to determine whether the second signal is invalid when the first signal is invalid; if yes, determine whether the second signal is valid when the first signal is invalid; if yes, determine whether the second signal is valid when the first signal is valid; If yes, it is further determined whether the second signal is invalid when the first signal is valid.
  • the positive infusion state of the current infusion pump can be accurately identified.
  • the identification of the operating state of the infusion pump further includes a pressure release state
  • the identification module 602 is further configured to identify whether the operating state of the infusion pump is a pressure release state before releasing the blocked fluid in the infusion set, and if so, A step of releasing the occlusion liquid in the infusion set is performed.
  • the identification module 602 is further configured to determine whether the second signal is invalid when the first signal is invalid; if yes, determine whether the second signal is invalid when the first signal is valid; if yes, determine that the first signal is valid again. Whether the second signal is valid; if yes, further determining whether the second signal is valid when the first signal is invalid.
  • the pressure release state in which the current infusion pump is located can be accurately identified.
  • the infusion pump is in a pressure release state
  • the occlusion liquid in the infusion set is released. If the blocking pressure is less than or equal to the pressure release threshold, or if the amount of liquid that has blocked the liquid release is greater than or equal to the liquid release threshold, then stopping the liquid blockage prevents reverse infusion, thereby increasing the safety of the infusion.
  • an infusion pump including a first code wheel, a second code wheel, a first sensor, and a second sensor, the first sensor corresponding to the first code wheel, and outputting the first signal, the second The sensor corresponds to the second code wheel, and outputs a second signal.
  • the first code disk and the second code disk respectively form a gap, and the number of the first code disk is an integer multiple of the number of the second code disk, or the second code
  • the number of gaps of the disc is an integral multiple of the number of gaps of the first code disc.
  • the first sensor detects the gap of the first code disc
  • the first signal is output
  • the second sensor detects the gap of the second code disc
  • a valid second signal is output, and the operating state of the infusion pump is identified according to the first signal and the second signal.
  • the operating state of the infusion pump includes a forward infusion state, a pressure release state, and a reverse infusion state. During the entire operation of the infusion pump, it is necessary to monitor the operating state of the infusion pump in real time to prevent entry into the reverse infusion state.
  • the notched line of the first code wheel is aligned with the notched edge of the second code wheel, or the notched line of the second code wheel is aligned with the notched edge of the first code wheel.
  • Determining whether the infusion pump is in a forward infusion state according to the timing of the first signal and the second signal. Specifically, determining whether the second signal is invalid when the first signal is invalid; if yes, determining whether the second signal is invalid when the first signal is invalid If yes, it is determined again whether the second signal is valid when the first signal is valid; if yes, it is further determined whether the second signal is invalid when the first signal is valid, thereby being able to recognize that the operating state of the infusion pump is a positive infusion state. Maintain the positive infusion state of the infusion pump if the obstruction pressure generated by the blocked fluid in the infusion set is less than the pressure alarm threshold.
  • the infusion pump stops the positive infusion and identifies whether the current infusion pump is in a pressure release state. Specifically, it is determined whether the second signal is invalid when the first signal is invalid; if yes, the second judgment is made. Whether the second signal is invalid when a signal is valid; if yes, it is determined again whether the second signal is valid when the first signal is valid; if yes, further determining whether the second signal is valid when the first signal is invalid, thereby accurately identifying the current infusion
  • the pressure release state of the pump The infusion pump releases the blocking fluid in the infusion set.
  • the infusion pump stops releasing the occlusion fluid. Prevent the infusion pump from entering the reverse infusion state.
  • the infusion pump When the infusion pump is in the forward infusion state, if the blocking pressure generated by the blocking fluid in the infusion set is greater than or equal to the pressure alarm threshold, the positive infusion is stopped, effectively preventing the liquid from continuing to be input into the infusion set.
  • the occlusion liquid in the infusion set is released after the infusion pump stops infusion, and if the occlusion pressure is less than or equal to the pressure release threshold or the amount of liquid that has blocked the release of the liquid is greater than or equal to the liquid release threshold, the infusion pump stops releasing the occlusion liquid.
  • the blocking pressure in the infusion device is released, thereby effectively avoiding the damage caused by the blocked part of the infusion set being injected into the human body instantaneously, and whether the infusion set can be effectively prevented from being infused, thereby improving the safety of the infusion.

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Abstract

一种输液器内阻塞压力释放方法、输液器内阻塞压力释放装置和输液泵，输液器内阻塞压力释放方法包括：识别输液泵的运行状态是否为正向输液状态（步骤102，步骤202）；若是，则判断输液器内的阻塞液体所产生的阻塞压力是否大于或等于压力报警阈值（步骤104，步骤204）；若是，则停止正向输液，并释放输液器内的阻塞液体（步骤106）；判断阻塞压力是否小于或等于压力释放阈值，或者阻塞液体已释放的液体量是否大于或等于液体释放阈值（步骤108，步骤210）；若是，则停止释放阻塞液体（步骤110，步骤212）。输液器内阻塞压力释放方法能够有效避免输液器阻塞部分累积的阻塞液体在瞬间注入人体造成的危害，提高输液安全性。

Description

输液器内阻塞压力释放方法、装置和输液泵
【技术领域】
本发明涉及医疗器械技术领域，特别是涉及一种输液器内阻塞压力释放方法、装置和输液泵。
【背景技术】
输液泵是一种可精确控制输液速度和输液量，并且能对气泡、空液、输液管阻塞等异常情况进行报警并自动切断输液通路的一种智能仪器。常用于需要严格控制输液量和药量的情况，如在应用升压药物，抗心律失常药药物，婴幼儿静脉输液或静脉麻醉等。
在输液操作过程中，输液器发生弯折或被压等情况时，会造成输液器堵塞。如果输液泵继续输液，由于输液器材质本身具有伸缩弹性，输液器内部液体会累积增加，直到内部液体压力达到报警阈值，才会触发阻塞报警，停止输液，发出相应报警。输液泵在停止输液时，泵体会将输液器堵塞，截止输液器内液体流动，使得输液泵到输液器阻塞处之间的输液器管内液体量及压力保持不变。处理输液阻塞的方式一般是对输液器进行检查，当输液器发生弯折或被压时，人为将输液器拉直或移除压放物体，使输液管路畅通。由于输液器内阻塞部分累计的液体会产生一定的压力，在输液管路畅通时，输液器阻塞部分累积的液体会在瞬间直接输入到人体内。对于输液泵临床使用的药物，在瞬间注入人体时很可能会引起身体不适，某些药物的瞬间大量注入甚至会给病人带来危害。如何有效避免输液器阻塞部分累积的液体在瞬间注入人体造成危害，提高输液的安全性是目前急需解决的一个技术问题。
【发明内容】
基于此，有必要针对上述技术问题，提供一种能够有效避免输液器阻塞部分累积的液体在瞬间注入人体造成危害，提高输液安全性的输液器内阻塞压力释放方法、装置和输液泵。
一种输液器内阻塞压力释放方法，所述方法包括：
识别输液泵的运行状态是否为正向输液状态；
若是，则判断输液器内的阻塞液体所产生的阻塞压力是否大于或等于压力报警阈值；
若是，则停止正向输液，并释放所述输液器内的阻塞液体；
判断所述阻塞压力是否小于或等于压力释放阈值，或者所述阻塞液体已释放的液体量是否大于或等于液体释放阈值；
若是，则停止释放所述阻塞液体。
在其中一个实施例中，在所述停止正向输液的步骤之后，还包括：
获取已输入所述输液器内的液体总量；
在所述停止释放所述阻塞液体的步骤之后，还包括：
获取所述已释放的液体量；
计算所述液体总量与所述已释放的液体量的差值，得到实际输液量。
在其中一个实施例中，所述识别输液泵的运行状态是否为正向输液状态的步骤包括：
接收传感器检测码盘的运动状态时输出的信号，所述传感器包括第一传感器和第二传感器，所述码盘包括第一码盘和第二码盘，所述第一传感器与所述第一码盘对应，所述第二传感器与所述第二码盘对应，所述第一传感器输出第一信号，所述第二传感器输出第二信号；
判断所述第一信号无效时所述第二信号是否无效；
若是，则再次判断所述第一信号无效时所述第二信号是否有效；
若是，则再次判断所述第一信号有效时所述第二信号是否有效；
若是，则进一步判断所述第一信号有效时所述第二信号是否无效。
在其中一个实施例中，所述识别输液泵的运行状态还包括压力释放状态，在所述释放所述输液器内的阻塞液体的步骤之前，还包括：
识别所述输液泵的运行状态是否为压力释放状态，若是，则执行所述释放所述输液器内的阻塞液体的步骤。
在其中一个实施例中，所述识别所述输液泵的运行状态是否为压力释放状态的步骤包括：
判断所述第一信号无效时所述第二信号是否无效；
若是，则再次判断所述第一信号有效时所述第二信号是否无效；
若是，则再次判断所述第一信号有效时所述第二信号是否有效；
若是，则进一步判断所述第一信号无效时所述第二信号是否有效。
在其中一个实施例中，所述码盘开设多个缺口，所述第一码盘的缺口数量是所述第二码盘的缺口数量的整数倍，或者所述第二码盘的缺口数量是所述第一码盘的缺口数量的整数倍，若第一传感器检测到第一码盘的缺口，则输出有效的第一信号，若第二传感器检测到第二码盘的缺口，则输出有效的第二信号。
在其中一个实施例中，所述第一码盘的缺口线与第二码盘的缺口边沿线对齐，或者所述第二码盘的缺口线与第一码盘的缺口边沿线对齐。
一种输液器内阻塞压力释放装置，所述装置包括：
识别模块，用于识别输液泵的运行状态是否为正向输液状态；
判断模块，用于若识别出输液泵为正向输液状态，则判断输液器内的阻塞液体所产生的阻塞压力是否大于或等于压力报警阈值；若是，则
停止模块，用于停止正向输液；
释放模块，用于释放所述输液器内的阻塞液体；
所述判断模块还用于判断所述阻塞压力是否小于或等于压力释放阈值，或者所述阻塞液体已释放的液体量是否大于或等于液体释放阈值；若是，则
所述停止模块还用于停止释放所述阻塞液体。
在其中一个实施例中，所述装置还包括：
获取模块，用于在停止正向输液之后，获取已输入所述输液器内的液体总量；在停止释放所述阻塞液体之后，获取所述已释放的液体量；
计算模块，用于计算所述液体总量与所述已释放的液体量的差值，得到实际输液量。
在其中一个实施例中，所述识别模块包括：
接收单元，用于接收传感器检测码盘的运动状态时输出的信号，所述传感器包括第一传感器和第二传感器，所述码盘包括第一码盘和第二码盘，所述第一传感器与所述第一码盘对应，所述第二传感器与所述第二码盘对应，所述第一传感器输出第一信号，所述第二传感器输出第二信号；
判断单元，用于判断所述第一信号无效时所述第二信号是否无效；若是，则再次判断所述第一信号无效时所述第二信号是否有效；若是，则再次判断所述第一信号有效时所述第二信号是否有效；若是，则进一步判断所述第一信号有效时所述第二信号是否无效。
在其中一个实施例中，所述识别输液泵的运行状态还包括压力释放状态，所述识别模块还用于在释放所述输液器内的阻塞液体的之前，识别所述输液泵的运行状态是否为压力释放状态，若是，则执行所述释放所述输液器内的阻塞液体的步骤。
在其中一个实施例中，所述识别模块还用于判断所述第一信号无效时所述第二信号是否无效；若是，则再次判断所述第一信号有效时所述第二信号是否无效；若是，则再次判断所述第一信号有效时所述第二信号是否有效；若是，则进一步判断所述第一信号无效时所述第二信号是否有效。
一种输液泵，所述输液泵包括第一码盘、第二码盘、第一传感器和第二传感器，所述第一传感器与第一码盘对应，并输出第一信号，所述第二传感器与第二码盘对应，并输出第二信号，所述第一码盘和所述第二码盘分别开设缺口，所述第一码盘的缺口数量是所述第二码盘的缺口数量的整数倍，或者所述第二码盘的缺口数量是所述第一码盘的缺口数量的整数倍，若第一传感器检测到第一码盘的缺口，则输出有效的第一信号，若第二传感器检测到第二码盘的缺口，则输出有效的第二信号，根据所述第一信号与所述第二信号识别所述输液泵的运行状态。
在其中一个实施例中，所述第一码盘的缺口线与第二码盘的缺口边沿线对齐，或者所述第二码盘的缺口线与第一码盘的缺口边沿线对齐。
上述输液器内阻塞压力释放方法、装置和输液泵，由于输液泵处于正向输液状态时，如果输液器内的阻塞液体产生的阻塞压力大于或等于压力报警阈值则停止正向输液，有效阻止了液体继续输入输液器。在停止输液后释放输液器内的阻塞液体，如果阻塞压力小于或等于压力释放阈值或者阻塞液体已释放的液体量大于或等于液体释放阈值，则停止释放阻塞液体。由此使得输液器内的阻塞压力得到释放，从而有效避免了输液器阻塞部分阻塞液体在瞬间注入人体造成危害，并且能否有效防止输液器反向输液，提高了输液的安全性。
【附图说明】
图1为一个实施例中输液器内阻塞压力释放方法的流程图；
图2为另一个实施例中输液器内阻塞压力释放方法的流程图；
图3-1为一个实施例中码盘的结构示意图；
图3-2为一个实施例中输液泵的结构示意图；
图4为一个实施例中正向输液状态的信号时序图；
图5为一个实施例中压力释放状态的信号时序图；
图6为一个实施例中输液器内阻塞压力释放装置的结构示意图；
图7为又一个实施例中输液器内阻塞压力释放装置的结构示意图；
图8为一个实施例中识别模块的结构示意图。
【具体实施方式】
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
在一个实施例中，如图1所示，提供了一种输液器内阻塞压力释放方法，该方法具体包括：
步骤102，识别输液泵的运行状态是否为正向输液状态；若是，则进入步骤104，否则，停止运行并且发出错误报警。
输液泵包括电机和泵体，输液泵上电后，电机转动带动泵体运动，输液泵开始运行。输液泵的运行状态包括正向输液状态和反向输液状态。由于反向输液状态会对被输液的人体造成危害，因此需要实时监控输液泵的运行状态，防止输液泵进入反向输液状态。如果识别到输液泵的运行状态为反向输液状态则停止运行并且发出错误报警。电机正向转动时，利用光电传感器实时监测输液泵的运行状态。具体的，可根据光电传感器输出的脉冲信号来识别输液泵的运行状态。如果识别输液泵当前的运动状态为正向输液状态，即输液泵向输液器内正向输液，则检测输液器内的阻塞液体产生的阻塞压力。输液器内的阻塞液体是指输液器发生弯折或被压时，输液器内阻塞部分累计的液体。阻塞液体会在输液器内产生阻塞压力。
步骤104，判断输液器内的阻塞液体所产生的阻塞压力是否大于或等于压力报警阈值；若是，则进入步骤106，否则，继续维持输液泵的正向输液状态。
判断输液器内的阻塞压力是否大于或等于压力报警阈值，如果是，则停止正向输液，即停止电机转动，由此阻止输液泵继续向输液器内输入液体。否则，则继续维持电机正向转动，即继续维持输液泵的正向输液状态。
步骤106，停止正向输液，并释放输液器内的阻塞液体。
停止正向输液后，由于输液器内的阻塞压力已经大于或等于压力报警阈值后，也就存在了一个压力差，在输液器被疏通后，会因为这个压力差而导致输液器内的阻塞液体在瞬间注入人体造成伤害。因此，需要消除这个压力差。这个压力差可以通过释放输液器内阻塞液体的方式来消除。具体的，可通过电机反转带动泵体运动，从输液器中抽取阻塞液体。
步骤108，判断阻塞压力是否小于或等于压力释放阈值，或者阻塞液体已释放的液体量是否大于或等于液体释放阈值；若是，则进入步骤110，否则，继续释放阻塞液体。
开始释放阻塞液体之后，利用压力传感器实时监测阻塞压力是否小于或等于压力释放阈值，或者实时监测阻塞液体已释放的液体量释放大于或等于液体释放阈值，如果是，则立即停止释放液体。
步骤110，停止释放阻塞液体。
停止释放阻塞液体，也就是停止电机反转。由此防止由于电机继续反转导致输液泵处于反向输液状态给人体带来危害。
本实施例中，识别输液泵的运行状态是否为正向输液状态；若是，则判断输液器内的阻塞液体所产生的阻塞压力是否大于或等于压力报警阈值；若是，则停止正向输液，并释放输液器内的阻塞液体；判断阻塞压力是否小于或等于压力释放阈值，或者阻塞液体已释放的液体量是否大于或等于液体释放阈值；若是，则停止释放所述阻塞液体。由于输液泵处于正向输液状态时，如果输液器内的阻塞液体产生的阻塞压力大于或等于压力报警阈值则停止正向输液，有效阻止了液体继续输入输液器。在停止输液后释放输液器内的阻塞液体，如果阻塞压力小于或等于压力释放阈值或者阻塞液体已释放的液体量大于或等于液体释放阈值，则停止释放阻塞液体。由此使得输液器内的阻塞压力得到释放，从而有效避免了输液器阻塞部分阻塞液体在瞬间注入人体造成危害，并且能否有效防止输液器反向输液，提高了输液的安全性。
在一个实施例中，在停止正向输液的步骤之后，还包括：获取已输入输液器内的液体总量；在停止释放阻塞液体的步骤之后，还包括：获取已释放的液体量；计算液体总量与已释放的液体量的差值，得到实际输液量。
如图2所示，本实施例中的输液器内阻塞压力释放方法具体包括以下步骤：
步骤202，识别输液泵的运行状态是否为正向输液状态；若是，则进入步骤204，否则，继续监控输液泵的运行状态。
步骤204，判断输液器内的阻塞液体所产生的阻塞压力是否大于或等于压力报警阈值；若是，则进入步骤206，否则，继续维持输液泵的正向输液状态。
步骤206，停止正向输液，获取已输入输液器内的液体总量。
步骤208，释放输液器内的阻塞液体。
步骤210，判断阻塞压力是否小于或等于压力释放阈值，或者阻塞液体已释放的液体量是否大于或等于液体释放阈值；若是，则进入步骤212，否则，继续释放阻塞液体。
步骤212，停止释放阻塞液体。
步骤214，获取已释放的液体量。
步骤216，计算液体总量与已释放的液体量的差值，得到实际输液量。
本实施例中，释放阻塞液体时，对释放的液体量进行记录，根据输入输液器内的液体总量与已释放的液体量的差值来得到实际输液量，从而保证了输液量的准确性。
在一个实施例中，识别输液泵的运行状态是否为正向输液状态的步骤包括：接收传感器检测码盘的运动状态时输出的信号，传感器包括第一传感器和第二传感器，码盘包括第一码盘和第二码盘，第一传感器与第一码盘对应，第二传感器与第二码盘对应，第一传感器输出第一信号，第二传感器输出第二信号；判断第一信号无效时第二信号是否无效；若是，则再次判断第一信号无效时第二信号是否有效；若是，则再次判断第一信号有效时第二信号是否有效；若是，则进一步判断第一信号有效时第二信号是否无效。
本实施例中，输液泵中还包括泵体、电机、码盘和传感器，电机转动带动泵体运动，码盘随着电机的转动一起运动，传感器检测码盘的运动状态。其中，码盘包括第一码盘和第二码盘，传感器包括第一传感器和第二传感器。第一传感器用于检测第一码盘的运动状态，并输出对应的第一信号。第二传感器用于检测第二码盘的运动状态，并输出对应的第二信号。第一传感器和第二传感器可以是光电传感器。在其中一个实施例中，码盘开设多个缺口，第一码盘的缺口数量是第二码盘的缺口数量的整数倍，或者第二码盘的缺口数量是第一码盘的缺口数量的整数倍，若第一传感器检测到第一码盘的缺口，则输出有效的第一信号，若第二传感器检测到第二码盘的缺口，则输出有效的第二信号。在另一个实施例中，第一码盘的缺口线与第二码盘的缺口边沿线对齐，或者第二码盘的缺口线与第一码盘的缺口边沿线对齐。
码盘的结构如图3-1所示，第一码盘302开设一个缺口，第二码盘304开设多个缺口。输液泵的结构如图3-2所示，第一传感器306设于第一码盘302的下方，用于检测第一码盘302的运动状态，并输出第一信号。第二传感器308设于第二码盘304的下方，用于检测第二码盘304的运动状态，并输出第二信号。第二码盘304的缺口数量是第一码盘302的缺口数量的整数倍，并且第一码盘302的缺口线与第二码盘304的缺口边沿线对齐。第二码盘304设于第一码盘302与泵体310之间的位置。第一传感器306检测到第一码盘302的缺口时输出有效的第一信号，第二传感器308检测到第二码盘304的缺口时输出有效的第二信号。泵体310在电机（图中未标出）的带动下运动，在输液泵的整个工作过程中，需要实时监控输液泵的运行状态，防止反向输液。如果第一传感器与第二传感器均未输出有效信号时，则第一传感器需要继续检测第一码盘的运动状态和第二传感器需要继续检测第二码盘的运动状态。如果首先检测的有效信号为第二传感器输出的第二信号时，说明输液泵可能为正向输液状态，为了进一步确认输液泵当前处于正向输液状态，继续接收第一传感器输出的第一信号和第二传感器输出的第二信号。输液泵的运行状态为正向输液状态时，第一信号与第二信号的时序图，如图4所示。在一个正向输液状态的周期内，第一信号无效且第二信号无效，第一信号无效且第二信号有效，第一信号有效且第二信号无效，第一信号有效且第二信号无效。由此，根据第一信号与第二信号的时序图，能够准确识别出当前输液泵所处的正向输液状态。
在一个实施例中，识别输液泵的运行状态还包括压力释放状态，在释放输液器内的阻塞液体的步骤之前，还包括：识别输液泵的运行状态是否为压力释放状态，若是，则执行释放输液器内的阻塞液体的步骤。
本实施例中，输液泵的运行状态还包括压力释放状态。在其中一个实施例中，识别输液泵的运行状态是否为压力释放状态的步骤包括：判断第一信号无效时第二信号是否无效；若是，则再次判断第一信号有效时第二信号是否无效；若是，则再次判断第一信号有效时第二信号是否有效；若是，则进一步判断第一信号无效时第二信号是否有效。输液泵的运行状态为压力释放状态时，第一信号与第二信号的时序图，如图5所示。在一个压力释放状态的周期内，第一信号无效且第二信号无效，第一信号有效且第二信号无效，第一信号有效且第二信号有效，第一信号无效且第二信号有效。由此，根据第一信号与第二信号的时序图，能够准确识别出当前输液泵所处的压力释放状态。在识别出输液泵为压力释放状态时，释放输液器内的阻塞液体。若阻塞压力小于或等于压力释放阈值，或者阻塞液体已释放的液体量大于或等于液体释放阈值，则停止释放阻塞液体，防止反向输液，由此提高了输液的安全性。
在一个实施例中，如图6所示，提供了一种输液器内阻塞压力释放装置，该装置包括：识别模块602、判断模块604、停止模块606和释放模块608，其中：
识别模块602，用于识别输液泵的运行状态是否为正向输液状态。
判断模块604，用于若识别出输液泵为正向输液状态，则判断输液器内的阻塞液体所产生的阻塞压力是否大于或等于压力报警阈值。
停止模块606，用于输液器内的阻塞液体所产生的阻塞压力大于或等于压力报警阈值时停止正向输液。
释放模块608，用于释放输液器内的阻塞液体。
判断模块604还用于判断阻塞压力是否小于或等于压力释放阈值，或者阻塞液体已释放的液体量是否大于或等于液体释放阈值。
停止模块606还用于阻塞压力小于或等于压力释放阈值，或者阻塞液体已释放的液体量大于或等于液体释放阈值时停止释放阻塞液体。
本实施例中，由于输液泵处于正向输液状态时，如果输液器内的阻塞液体产生的阻塞压力大于或等于压力报警阈值则停止正向输液，有效阻止了液体继续输入输液器。在停止输液后释放输液器内的阻塞液体，如果阻塞压力小于或等于压力释放阈值或者阻塞液体已释放的液体量大于或等于液体释放阈值，则停止释放阻塞液体。由此使得输液器内的阻塞压力得到释放，从而有效避免了输液器阻塞部分阻塞液体在瞬间注入人体造成危害，并且能否有效防止输液器反向输液，提高了输液的安全性。
在一个实施例中，如图7所示，该装置还包括：获取模块610和计算模块612，其中：
获取模块610，用于在停止正向输液之后，获取已输入输液器内的液体总量；在停止释放所述阻塞液体之后，获取已释放的液体量。
计算模块612，用于计算液体总量与已释放的液体量的差值，得到实际输液量。
本实施例中，释放阻塞液体时，对释放的液体量进行记录，根据输入输液器内的液体总量与已释放的液体量的差值来得到实际输液量，从而保证了输液量的准确性。
在一个实施例中，如图8所示，识别模块602包括：接收单元602a和判断单元604b，其中：
接收单元602a，用于接收传感器检测码盘的运动状态时输出的信号，传感器包括第一传感器和第二传感器，码盘包括第一码盘和第二码盘，第一传感器与第一码盘对应，第二传感器与所述第二码盘对应，第一传感器输出第一信号，第二传感器输出第二信号。
判断单元604b，用于判断第一信号无效时第二信号是否无效；若是，则再次判断第一信号无效时第二信号是否有效；若是，则再次判断第一信号有效时第二信号是否有效；若是，则进一步判断第一信号有效时第二信号是否无效。
本实施例中，根据第一信号与第二信号的时序图，能够准确识别出当前输液泵所处的正向输液状态。
在一个实施例中，识别输液泵的运行状态还包括压力释放状态，识别模块602还用于在释放输液器内的阻塞液体的之前，识别输液泵的运行状态是否为压力释放状态，若是，则执行释放所述输液器内的阻塞液体的步骤。在其中一个实施例中，识别模块602还用于判断第一信号无效时第二信号是否无效；若是，则再次判断第一信号有效时第二信号是否无效；若是，则再次判断第一信号有效时第二信号是否有效；若是，则进一步判断第一信号无效时第二信号是否有效。
本实施例中，根据第一信号与第二信号的时序图，能够准确识别出当前输液泵所处的压力释放状态。在识别出输液泵为压力释放状态时，释放输液器内的阻塞液体。若阻塞压力小于或等于压力释放阈值，或者阻塞液体已释放的液体量大于或等于液体释放阈值，则停止是否阻塞液体，防止反向输液，由此提高了输液的安全性。
在一个实施例中，提供了一种输液泵，包括第一码盘、第二码盘、第一传感器和第二传感器，第一传感器与第一码盘对应，并输出第一信号，第二传感器与第二码盘对应，并输出第二信号，第一码盘和第二码盘分别开设缺口，第一码盘的缺口数量是第二码盘的缺口数量的整数倍，或者第二码盘的缺口数量是第一码盘的缺口数量的整数倍，若第一传感器检测到第一码盘的缺口，则输出有效的第一信号，若第二传感器检测到第二码盘的缺口，则输出有效的第二信号，根据第一信号与第二信号识别输液泵的运行状态。
本实施例中，输液泵的运行状态包括正向输液状态、压力释放状态和反向输液状态。在输液泵的整个工作过程中，需要实时监控输液泵的运行状态，防止进入反向输液状态。在其中一个实施例中，第一码盘的缺口线与第二码盘的缺口边沿线对齐，或者第二码盘的缺口线与第一码盘的缺口边沿线对齐。
根据第一信号与第二信号的时序来识别输液泵是否处于正向输液状态，具体的，判断第一信号无效时第二信号是否无效；若是，则再次判断第一信号无效时第二信号是否有效；若是，则再次判断第一信号有效时第二信号是否有效；若是，则进一步判断第一信号有效时第二信号是否无效，由此能够识别出输液泵的运行状态为正向输液状态。若输液器内的阻塞液体所产生的阻塞压力小于压力报警阈值时维持输液泵的正向输液状态。若阻塞压力大于或等于压力报警阈值，则输液泵停止正向输液，并且识别当前输液泵是否处于压力释放状态，具体的，判断第一信号无效时第二信号是否无效；若是，则再次判断第一信号有效时第二信号是否无效；若是，则再次判断第一信号有效时第二信号是否有效；若是，则进一步判断第一信号无效时第二信号是否有效，由此能够准确识别出当前输液泵所处的压力释放状态。输液泵释放输液器内的阻塞液体。若阻塞压力小于或等于压力释放阈值，或者阻塞液体已释放的液体量大于或等于液体释放阈值，则输液泵停止释放阻塞液体。防止输液泵进入反向输液状态。
由于输液泵处于正向输液状态时，如果输液器内的阻塞液体产生的阻塞压力大于或等于压力报警阈值则停止正向输液，有效阻止了液体继续输入输液器。在输液泵停止输液后释放输液器内的阻塞液体，如果阻塞压力小于或等于压力释放阈值或者阻塞液体已释放的液体量大于或等于液体释放阈值，则输液泵停止释放阻塞液体。由此使得输液器内的阻塞压力得到释放，从而有效避免了输液器阻塞部分阻塞液体在瞬间注入人体造成危害，并且能否有效防止输液器反向输液，提高了输液的安全性。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (14)

  1. 一种输液器内阻塞压力释放方法，所述方法包括：
    识别输液泵的运行状态是否为正向输液状态；
    若是，则判断输液器内的阻塞液体所产生的阻塞压力是否大于或等于压力报警阈值；
    若是，则停止正向输液，并释放所述输液器内的阻塞液体；
    判断所述阻塞压力是否小于或等于压力释放阈值，或者所述阻塞液体已释放的液体量是否大于或等于液体释放阈值；
    若是，则停止释放所述阻塞液体。
  2. 根据权利要求1所述的方法，其特征在于，在所述停止正向输液的步骤之后，还包括：
    获取已输入所述输液器内的液体总量；
    在所述停止释放所述阻塞液体的步骤之后，还包括：
    获取所述已释放的液体量；
    计算所述液体总量与所述已释放的液体量的差值，得到实际输液量。
  3. 根据权利要求1所述的方法，其特征在于，所述识别输液泵的运行状态是否为正向输液状态的步骤包括：
    接收传感器检测码盘的运动状态时输出的信号，所述传感器包括第一传感器和第二传感器，所述码盘包括第一码盘和第二码盘，所述第一传感器与所述第一码盘对应，所述第二传感器与所述第二码盘对应，所述第一传感器输出第一信号，所述第二传感器输出第二信号；
    判断所述第一信号无效时所述第二信号是否无效；
    若是，则再次判断所述第一信号无效时所述第二信号是否有效；
    若是，则再次判断所述第一信号有效时所述第二信号是否有效；
    若是，则进一步判断所述第一信号有效时所述第二信号是否无效。
  4. 根据权利要求3所述的方法，其特征在于，所述识别输液泵的运行状态还包括压力释放状态，在所述释放所述输液器内的阻塞液体的步骤之前，还包括：
    识别所述输液泵的运行状态是否为压力释放状态，若是，则执行所述释放所述输液器内的阻塞液体的步骤。
  5. 根据权利要求4所述的方法，其特征在于，所述识别所述输液泵的运行状态是否为压力释放状态的步骤包括：
    判断所述第一信号无效时所述第二信号是否无效；
    若是，则再次判断所述第一信号有效时所述第二信号是否无效；
    若是，则再次判断所述第一信号有效时所述第二信号是否有效；
    若是，则进一步判断所述第一信号无效时所述第二信号是否有效。
  6. 根据权利要求3-5任一项所述的方法，其特征在于，所述码盘开设多个缺口，所述第一码盘的缺口数量是所述第二码盘的缺口数量的整数倍，或者所述第二码盘的缺口数量是所述第一码盘的缺口数量的整数倍，若第一传感器检测到第一码盘的缺口，则输出有效的第一信号，若第二传感器检测到第二码盘的缺口，则输出有效的第二信号。
  7. 根据权利要求6所述的方法，其特征在于，所述第一码盘的缺口线与第二码盘的缺口边沿线对齐，或者所述第二码盘的缺口线与第一码盘的缺口边沿线对齐。
  8. 一种输液器内阻塞压力释放装置，其特征在于，所述装置包括：
    识别模块，用于识别输液泵的运行状态是否为正向输液状态；
    判断模块，用于若识别出输液泵为正向输液状态，则判断输液器内的阻塞液体所产生的阻塞压力是否大于或等于压力报警阈值；若是，则
    停止模块，用于停止正向输液；
    释放模块，用于释放所述输液器内的阻塞液体；
    所述判断模块还用于判断所述阻塞压力是否小于或等于压力释放阈值，或者所述阻塞液体已释放的液体量是否大于或等于液体释放阈值；若是，则
    所述停止模块还用于停止释放所述阻塞液体。
  9. 根据权利要求8所述的装置，其特征在于，所述装置还包括：
    获取模块，用于在停止正向输液之后，获取已输入所述输液器内的液体总量；在停止释放所述阻塞液体之后，获取所述已释放的液体量；
    计算模块，用于计算所述液体总量与所述已释放的液体量的差值，得到实际输液量。
  10. 根据权利要求8所述的装置，其特征在于，所述识别模块包括：
    接收单元，用于接收传感器检测码盘的运动状态时输出的信号，所述传感器包括第一传感器和第二传感器，所述码盘包括第一码盘和第二码盘，所述第一传感器与所述第一码盘对应，所述第二传感器与所述第二码盘对应，所述第一传感器输出第一信号，所述第二传感器输出第二信号；
    判断单元，用于判断所述第一信号无效时所述第二信号是否无效；若是，则再次判断所述第一信号无效时所述第二信号是否有效；若是，则再次判断所述第一信号有效时所述第二信号是否有效；若是，则进一步判断所述第一信号有效时所述第二信号是否无效。
  11. 根据权利要求10所述的方法，其特征在于，所述识别输液泵的运行状态还包括压力释放状态，所述识别模块还用于在释放所述输液器内的阻塞液体的之前，识别所述输液泵的运行状态是否为压力释放状态，若是，则执行所述释放所述输液器内的阻塞液体的步骤。
  12. 根据权利要求11所述的方法，其特征在于，所述识别模块还用于判断所述第一信号无效时所述第二信号是否无效；若是，则再次判断所述第一信号有效时所述第二信号是否无效；若是，则再次判断所述第一信号有效时所述第二信号是否有效；若是，则进一步判断所述第一信号无效时所述第二信号是否有效。
  13. 一种输液泵，其特征在于，所述输液泵包括第一码盘、第二码盘、第一传感器和第二传感器，所述第一传感器与第一码盘对应，并输出第一信号，所述第二传感器与第二码盘对应，并输出第二信号，所述第一码盘和所述第二码盘分别开设缺口，所述第一码盘的缺口数量是所述第二码盘的缺口数量的整数倍，或者所述第二码盘的缺口数量是所述第一码盘的缺口数量的整数倍，若第一传感器检测到第一码盘的缺口，则输出有效的第一信号，若第二传感器检测到第二码盘的缺口，则输出有效的第二信号，根据所述第一信号与所述第二信号识别所述输液泵的运行状态。
  14. 根据权利要求13所述的输液泵，其特征在于，所述第一码盘的缺口线与第二码盘的缺口边沿线对齐，或者所述第二码盘的缺口线与第一码盘的缺口边沿线对齐。
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