AU2019101633A4 - A pneumatic blood drawing device - Google Patents
A pneumatic blood drawing device Download PDFInfo
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- AU2019101633A4 AU2019101633A4 AU2019101633A AU2019101633A AU2019101633A4 AU 2019101633 A4 AU2019101633 A4 AU 2019101633A4 AU 2019101633 A AU2019101633 A AU 2019101633A AU 2019101633 A AU2019101633 A AU 2019101633A AU 2019101633 A4 AU2019101633 A4 AU 2019101633A4
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- cuff
- air
- inflating
- control member
- blood collection
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/132—Tourniquets
- A61B17/135—Tourniquets inflatable
- A61B17/1355—Automated control means therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Hematology (AREA)
- Biophysics (AREA)
- Biomedical Technology (AREA)
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- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The present invention provides a pneumatic blood drawing device comprising a cuff, wherein the said pneumatic blood drawing device further comprises a control member, an inflating member mounted to the said control member, a deflating member and a time control member, an air passage is mounted between an air outlet portion of the said inflating member and the said cuff, the said deflating member is mounted to the said air outlet portion of the said inflating member, the said inflating member is adapted for inflating the said cuff by allowing the air to pass through the said air passage to the said cuff according to the preset pressure value inside the said cuff, the said time control member is adapted for measuring a preset time period of blood collection, the said control member is adapted for releasing the air inside the said cuff by deactivating the said inflating member and activating the said deflating member when the preset time period for blood collection has been reached, the said pneumatic blood drawing device further comprises an alarm member mounted to the said control member adapted for raising alarm for the remaining time period for blood collection, the said alarm member is a buzzer and/or a warning light, and the said buzzer is used to emit sounds of different frequencies to warn the remaining time period for blood collection. The warning light is adapted to emit various lights to alert the remaining time period for blood collection. \24 23 19 11 16 161 20 21 22 162 Fig. 2
Description
2019101633 17 Dec 2019
A PNEUMATIC BLOOD DRAWING DEVICE
FIELD OF THE INVENTION
The present invention relates to the field of medical device technology, and in particular to a pneumatic blood drawing device for blood collection.
BACKGROUND OF THE INVENTION
In a hospital or a clinic, venipuncture or venesection is usually performed on a patient's limb to draw blood. In order to puncture the vein, venous congestion must be firstly realized by preventing blood from returning from the vein while allowing blood to flow into the artery. Blood drawing is currently performed by binding the upstream area of the limb venipuncture site, as shown in Figure 1. The blood-drawing belt 1 is generally a rubber tube or a flat rubber belt, which may cause the patient to feel too tight and discomfort when being bound, and the blood flow of the artery may also be blocked. Moreover, if the blood-drawing belt is left on the body of the patient for a long time, it may cause limb damage of the patient’s limb due to ischemia.
SUMMARY OF THE INVENTION
The problem to be solved in the present invention is to resolve the shortcomings of the prior technology of blood drawing device and provide a pneumatic blood drawing device and its method of use.
A pneumatic blood drawing device comprising a cuff, wherein the said pneumatic blood drawing device further comprises a control member, an inflating member mounted to the said control member, a deflating member and a time control member, an air passage is mounted between an air outlet portion of the said inflating member and the said cuff, the said i
2019101633 17 Dec 2019 deflating member is mounted to the said air outlet portion of the said inflating member, the said inflating member is adapted for inflating the said cuff by allowing the air to pass through the said air passage to the said cuff according to the preset pressure value inside the said cuff, the said time control member is adapted for measuring a preset time period of blood collection, the said control member is adapted for releasing the air inside the said cuff by deactivating the said inflating member and activating the said deflating member when the preset time period for blood collection has been reached.
Typically, the device further comprises an alarm member mounted to the said control member adapted for raising alarm for the remaining time period for blood collection.
Typically, the alarm member is a buzzer and/or a warning light, and the said buzzer is used to emit sounds of different frequencies to warn the remaining time period for blood collection. The warning light is adapted to emit various lights to alert the remaining time period for blood collection.
Typically, the device further comprises an air pressure detection member for detecting the pressure value in the said air passage; the said air pressure detection member is mounted respectively to the said control member, and the air outlet portion of the said inflating member.
Typically, the said air pressure detection member comprises an air pressure sensor.
Typically, the device further comprises a display member for displaying information related to the blood collection process; the said display member is mounted to the said control member.
Typically, the said display member comprises a display screen and/or a pressure indicator light.
Typically, the device further comprises a manual control member, the said manual control member is mounted to the control member for manual control of the device.
2019101633 17 Dec 2019
Typically, the said manual control member comprises a pressure selector and a switch button; the said pressure selector is adapted for selecting the preset pressure value, and the said switch button is adapted for activating and / or deactivating the device.
Typically, the said cuff is provided with an air inlet, and the said air passage is detachably coupled to the said air inlet.
Typically, a method of using a pneumatic blood drawing device comprises the following steps:
Attaching the cuff to the limb;
Controlling the operation of the inflating member through the control member, and the said inflating member is adapted for inflating the said cuff by allowing the air to pass through the air passage to the said cuff according to the preset pressure value;
Deactivating the deflating member through the control member;
After the said inflating member operates and the said deflating member is closed, by activating the time control member with the said control member, measure the preset time period of blood collection;
The said control member is adapted for releasing the air inside the said cuff by deactivating the said inflating member and activating the said deflating member when the preset time period for blood collection has been reached.
Typically, the device further comprises the following steps: after the said time control member is started, by activating the alarm member with the said control member, the said alarm member raises alarm for the remaining time period of blood collection.
Typically, the alarm member is a buzzer and/or a warning light, and the buzzer emits sounds of different frequencies to raise alarm for the remaining time period of blood collection, and the said warning light emits different light alarms to raise alarm for the remaining time period of blood collection.
2019101633 17 Dec 2019
Typically, the method further comprises the following steps: detecting the pressure value in the said air passage with the air pressure detection member after the said inflating member operates and the deflating member is closed; the said control member compares the detected pressure value in the air passage with the preset pressure value, and controls the said inflating member to operate at different duty cycle according to the comparison result.
Typically, the said control member compares the detected pressure value in the air passage with the preset pressure value, and controls the said inflating member to operate at different duty cycle according to the comparison result. The detailed method is as follows: If the pressure value in the air passage is higher than the preset pressure value 5 mmHg, the inflating member operates at a duty cycle of 10%;
If the pressure value in the air passage is higher than the preset pressure value and is not higher than 5 mmHg at the same time, the inflating member operates at a duty cycle of 40%;
If the pressure value in the air passage is lower than the preset pressure value and is not lower than 5 mmHg at the same time, the inflating member operates at a duty cycle of 55%;
Otherwise, the inflating member operates at a duty cycle of 100%.
Typically, the said preset pressure value is a diastolic pressure.
BRIEF DESCRIPTION OF THE DRAWINGS
This and other objects, features and advantages of the invention will become apparent upon reading of the following detailed descriptions and drawings, in which:
Fig. 1 is a schematic diagram showing the prior technology of binding the upstream area of the limb venipuncture site;
Fig. 2 is a schematic diagram of a pneumatic blood drawing device of the present
2019101633 17 Dec 2019 invention;
Fig. 3 is a block diagram of the pneumatic blood drawing device of Fig. 2 and
Fig. 4 is a schematic diagram showing the relationship between diastolic pressure and heartbeat.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The invention will now be further described with reference to the accompanying figures and embodiments.
Referring to a first embodiment and Fig. 2 and Fig. 3, the present invention provides a pneumatic blood drawing device as an auxiliary tool for blood collection, comprising a cuff 10, a control member 11, an inflating member 12 coupled to the control member 11, a time control member 13 and a deflating member 14.
In the present embodiment, the cuff 10 has a dimension of 8 x 43 cm and is suitable for use on the wrist and arm to be attached on the upstream of the venipuncture site. The specific dimension of the cuff 10 does not constitute a limitation of the present invention. The front and back sides of the cuff 10 are connected by a nylon buckle or a magic sticker for binding convenience. In other embodiments, the connection manner of the cuff can also be another feasible connection manner. For example, the cuff 10 can also be a loop sleeve, which may be directly sleeved on the wrist or the arm, so the specific connection manner of the cuff does not constitute any limitation of the present invention.
The inflating member 12 is provided with an air outlet portion. Preferably, the air outlet portion is an air outlet pipe 121. In other embodiments, the air outlet portion may also be an air outlet hole. In this embodiment, the air outlet pipe 121 is coupled to the cuff 10 through an air passage 15. Specifically, the cuff 10 is internally provided inside with an air storage space (not shown here), and the cuff 10 is provided with an air inlet 101 connected to
2019101633 17 Dec 2019 the air storage space. The air passage 15 is detachably coupled to the air inlet 101 by the mode like screwing, muff coupling, etc., so that the cuff 10 may be reused or used as a disposable item. The inflating member 12 is used to inflate the cuff 10 through the air passage 15 according to the preset pressure value in the cuff 10, so that the air pressure in the air storage space inside the cuff 10 may increase and be press against the wrist or the arm for blood collection. In this way, medical personnel need not bind wrists or arms, so as to save time and effort. In this embodiment, the inflating member 12 is an air pump. The charging frequency of the inflating member 12 may be constant or divided into a plurality of segments according to the instruction of the control member 11, such as a two-segment mode, a three-segment mode, or the like.
The control member 11 is a microprocessor, which controls other components of the device mainly by transmitting different PWM (Pulse Width Modulation), for example, controlling the operating action and stopping action of the inflating member 12, and the opening action and closing action of the deflating member 14.
The deflating member 14 is connected to the air outlet pipe 121 of the inflating member 12, and the deflating member 14 can be, for example, one solenoid valve or a group of solenoid valves. In this embodiment, the deflating member is one solenoid valve. The specific model and number of solenoid valves do not constitute a limitation of the present invention.
The time control member 13 is adapted for measuring the preset time period of blood collection, and the time control member 13 can be, for example, one timer or a group of timers. The specific model, brand and number of timers do not constitute a limitation of the present invention. The control member 11 is adapted for releasing the air inside the cuff 10 by deactivating the inflating member 12 and activating the deflating member 14 when the preset time period for blood collection has been reached. After clinical testing, the venipuncture
2019101633 17 Dec 2019 blood drawling is generally completed within 3 minutes. In this embodiment, the preset blood collection time is generally 3 minutes, and the time control member 13 counts the time period of 3 minutes for blood collection. If the blood collection is not completed within 3 minutes, the start button can be pressed down before the end time/reset time control member 13 to regain another 3 minutes. When the 3-minute time period is reached, the control member 11 is adapted for releasing the air inside the cuff 10 by deactivating the inflating member 12 and activating the deflating member 14, so that the cuff 10 no longer presses on the wrist or the arm, to prevented from limb from being damaged caused by ischemia due to long-time press on the wrist or the arm, and intelligent decompression is achieved. The cuff 10 can be removed from the wrist or the arm after the air inside the cuff 10 is released. The specific blood collection time will be adjusted according to actual medical needs and does not constitute a limitation of the present invention. The timing mode can also be changed according to the change of the air pressure value in the cuff 10. For example, when the air pressure value in the cuff 10 is higher than 5 mmHg, the timing member 13 starts to operate until the preset time is reached; or when the air pressure inside the cuff 10 is less than 5 mmHg, the time control member 13 stops operating. That is because when the air pressure in the cuff is lower than 5 mmHg, the pressure in the cuff cannot effectively press the limb of the patient, so that there is no need for timing.
In order to remind the medical personnel or the patient of the remaining blood collection time, preferably, the present invention is provided with an alarm member 16 connected to the control member 11 for raising alarm for the current remaining time period of blood collection. The remaining time period for blood collection, that is, the remaining time period from the time that the control member 11 releases the air inside the cuff 10 by deactivating the said inflating member 12 and activating the deflating member 14. The alarm member 16 can audibly alert the medical personnel or the patient, for example, the alarm member 16 may be a
2019101633 17 Dec 2019 buzzer 161 for emitting sounds of various frequencies to alert the remaining time. For example, the time control member 13 sets 3-minute time period for the blood collection. After the time control member 13 is activated, the buzzer 161 indicates the length of the remaining time by various sound combinations: when the remaining time period is more than 1 minute, the buzzer 161 emits a sound at the frequency of once every two seconds; when the remaining time period is more than 30 seconds but less than 60 seconds, the buzzer 161 emits a sound at a frequency of once per second; when the remaining time is less than 30 seconds, the buzzer 161 emits a sound at a frequency of twice per second, so as to makes a reminder to the medical personnel. The specific combination of sound frequencies does not constitute a limitation of the invention, or example it may be a combination of two different sound frequencies. The alarm member 16 can also visually alert the medical personnel or patient, for example, the alarm member 16 can be a warning light 162 for issuing different light warnings to alert the remaining time. For example, the timing member 13 sets the blood collection time of 3 minutes. After the timing member 13 is activated, when the remaining time is more than 1 minute, the warning light 162 emits light at a frequency of once every two seconds; when the remaining time is more than 30 seconds but less than 60 At the second second, the warning light 162 emits light at a frequency of once per second; when the remaining time is less than 30 seconds, the warning light 162 emits light at a frequency of twice per second, thereby visually alerting the medical personnel Of course, in order to better alert the medical personnel, a variety of alerting methods can be adopted at the same time, for example, both the auditory and visual alerting for the remaining time period of blood collection, for example, the alarm member 16 may be a combination of the buzzer 161 and the warning light 162, to further strengthen the warning and reminding effect.
Preferably, the present invention may further include a display member 19 connected to the control member 11. The display member 19 in this embodiment is a LCD display
2019101633 17 Dec 2019 screen for displaying information about the blood collection process or device, such as the current blood drawing time, the selected pressure level, the current pressure value in the air passage 15, the current diastolic pressure, etc. The specifically displayed content can be adjusted according to the needs of the user, thus the specifically displayed content does not constitute a limitation of the present invention. More preferably, the device of the present invention can also be provided with a pressure indicator light 163, using different pressure indicator light 163 to indicate the pressure value of the current cuff 10, so that the medical personnel does not need to constantly check the LCD member 19 to know whether the pressure value of the current cuff 10 is suitable for the patient. For example, if the preset pressure values are 70 mmHg, 80 mmHg, and 90 mmHg, the three pressure indicator lights 163 shall be set to correspond to different pressure values, and when the different pressure indicator lights 163 are lit, it means the current cuff 10 adopts corresponding preset pressure value. The number of specific pressure indicator lights 163 does not constitute a limitation of the present invention. For example, if the preset pressure value in the cuff 10 is only divided into low pressure and high pressure, then only two pressure indicator lights 163 are needed. Preferably, the present invention may further include a manual control member, specifically a pressure selector 20, a start/restart control button 21, and a stop button 22 in this embodiment. The pressure selector 20 is used to select a preset pressure value within the appropriate cuff 10, and the preset pressure value within the cuff 10 can be multiple. In the present embodiment, the preset pressure values in the cuff 10 are three, specifically 70 mmHg, 80 mmHg, and 90 mmHg. The specific number and value of the preset pressure values do not constitute a limitation of the present invention. When a preset pressure value is selected, the control member 11 may control the inflating member 12 to inflate the cuff 10 through the air passage 15 according to the preset pressure value. The start/restart control button 21 is used for start/restart, that is, when the start/restart control button 21 is pressed down, the device of
2019101633 17 Dec 2019 the present invention starts to operate; when the blood drawing is not completed within the preset time period for blood collection by the time control member 13, press the start/restart control button 21 to reset the blood collection time. If the blood drawing is completed ahead of time within the blood collection time preset by the time control member 13, the user may also choose to press down the stop button 22, then the control member 11 releases the air inside the said cuff 10 by deactivating the inflating member 12 and activating the deflating member 14.
The present invention may also include a power supply member 23. This embodiment uses a standard USB 5V power supply, which is a rechargeable power source. The specific power supply mode does not constitute a limitation of the present invention.
The present invention inflates the cuff through the inflating member, so that the cuff can press against the limb of the patient, thereby blood drawing is performed, which saves time and labor, and simultaneously releases the air in the cuff through the time control member and the deflating member. The invent can completely solve the lime damage caused by ischemia due to long-time press of blood-drawing belt left on the wrist or arm of the patient, realizes intelligent decompression, so it is safe and reliable.
Referring to a second embodiment, this embodiment is based on the first embodiment, and the same or similar parts as those in first embodiment will not be described again. The present invention may further include an air pressure detection member 18, which is connected to the control member 11 and the air outlet pipe 121 of the inflating member 12, for detecting the pressure value in the air passage 15, so that the control member 11 will compare the pressure value in the air passage 15 and the preset pressure values, and control the inflating member 12 to operate at the corresponding duty cycle according to the comparison result. Since the inflating member 12 has an air leakage phenomenon when stationary or in slow rotation, the inflating member 12 needs to maintain an appropriate io
2019101633 17 Dec 2019 rotation speed to fix the pressure value in the air passage 15 to a certain air pressure. For example, if the pressure value in the air passage 15 is higher than the preset pressure value by 5 mmHg, the inflating member 12 operates at a duty cycle of 10% (although theoretically, the inflating member does not need to be inflated, but in order to let the user feel comfortable, for example not feeling a sudden change of air pressure on the arm, the inflating member 12 will operate at the slowest 10% duty cycle); if the pressure value in the air passage is higher than the preset pressure value, and not higher than 5mmHg at the same time, since the air pressure is not higher too much, and the inflating member operates at a duty cycle of 40%; if the pressure value in the air passage is lower than the preset pressure value and is not lower than 5 mmHg at the same time, since the difference between it and the preset pressure values is small, the inflating member operates at a faster duty cycle of 55%; otherwise, the inflating member operates at a maximum speed of 100% duty cycle due to the large difference between it and the preset pressure value. Operating in a segmented duty cycle, it lets the user feel no obvious discomfort during use, which facilitates the smooth progress of the blood drawing. The above-mentioned is a preferred embodiment of the present invention, and the specific number of segments and the operating ratio of the duty cycle do not constitute a limitation of the present invention. Since one end of the air passage 15 is connected to the cuff 10, and the pressure loss from the air outlet pipe 121 to the air inlet 101 is almost negligible, the pressure value of the air passage 15 can also be regarded as the pressure value in the cuff 10. At the same time, the setting of the air pressure detection member 18 does not require changing the structure of the cuff 10, thereby facilitating the replacement of the cuff 10. In this embodiment, the air pressure detection member 18 is an air pressure sensor.
The normal human body has a diastolic blood pressure of 60-90 mmHg. Preferably, the preset pressure value is the patient's diastolic pressure and shall be greater than 50 mmHg. A suitable default pressure value can reduce the potential discomfort of the user during the
2019101633 17 Dec 2019 blood collection process. In the present embodiment, the detection of the diastolic pressure is performed by the air pressure detection member 18, that is, the air pressure sensor, using Low Pass Filter 24 and Moving Average to filter the noises, and combined with Oscillometric method or Fast Fourier Transformation to do analysis. The oscillometric method is taken here as an example for description. The air pump inflates the cuff and slowly deflate after certain pressure value is reached. During the deflation process, the pressure sensor converts the pressure signal in the cuff into an electrical signal and sends it to the control member 11 for filtering and algorithm calculation. Fig. 4 may be referred for the relationship between diastolic blood pressure and heartbeat. In the time-pressure diagram shown above in Fig. 4, the pressure in the cuff is 70-130mmHg, which does not mean that the pressure in the cuff can extend infinitely upwards or downwards, only indicates that the cuff 10 will have pressure changes during the deflating process. Let the initial preset pressure value be lOOmmHg. If the air pressure detection member 18 detects the oscillation of the pulse, the control member 11 adjusts the preset pressure value, for example reduced by 5 mmHg. The magnitude of the default pressure value adjustment does not constitute a limitation of the present invention. The above detection process shall be repeated until the air pressure detection member 18 can not detect the pulse oscillation. At this time, the pressure in the cuff is the patient's diastolic pressure. The control member 11 can use the diastolic pressure detected as the preset pressure value, and the blood-drawing belt will complete the whole blood-drawing process under the pressure value of the diastolic pressure, thereby completing the blood collection process better.
Referring to a third embodiment 3, the present invention also provides another method of using a pneumatic blood drawing device, comprising the following steps:
S101: attaching the cuff 10 to the limb;
The limb may be any area such as a wrist or an arm that requires venipuncture;
2019101633 17 Dec 2019
SI02: controlling the inflating member 12 to operate through the control member 11, then the inflating member 12 inflates the cuff 10 through the air passage 15 according to the preset pressure value;
When the inflating member 12 is operated, the pressure in the cuff 10 is gradually increased, thereby pressing the limb to facilitate blood collection;
SI03: controlling the deflating member 14 to be closed through the control member H;
The steps of SI02 and SI03 are not sequential, and also may be performed simultaneously. When the deflating member 14 is closed, the air basically only enters without coming out, so that the pressure required for blood collection can be reached in a short time; SI04: After the inflating member 12 operates and the deflating member 14 is closed, the time control member 13 is controlled to be started by the control member 11, to measure the preset time period of blood collection;
SI05: When the preset blood collection time arrives, the control member 11 releases the air inside the cuff 10 by deactivating the inflating member 12 and activating the deflating member 14. .
By applying the method the use of the present invention, the labor intensity of the medical personnel can be effectively alleviated, the time and labor can be effectively saved, and the limb damage caused by the ischemia due to long-term press of blood-drawing belt on the wrist or the arm of the patients is also completely solved, to achieve intelligent decompression, safety and reliability.
Referring to a fourth embodiment, this embodiment is based on the third embodiment, and the same or similar parts as those in the third embodiment will not be described again. The embodiment may further include the following steps: after the time control member 13 is started, the alarm member 16 is activated by the control member 11, and the alarm member 16
2019101633 17 Dec 2019 raises alarm to the remaining blood collection time. Specifically, the alarm member 16 is a buzzer 161, and the buzzer 161 emits sounds of different frequencies to alarm the remaining blood collection time, which serves as a warning reminder to the medical personnel. The alarm member 16 can also be a warning light 162 that emits different light or frequency warnings to alarm the remaining blood collection time, so as to visually alarm the medical personnel. Of course, the alarm member 16 can also be a buzzer 161 and a warning light 162 at the same time, which respectively alarm the medical personnel visually and aurally, and strengthen the warning effect. In this embodiment, the warning light 162 is one, and lights at various frequencies can be emitted respectively for warning.
Preferably, the embodiment may further include the following steps: detecting the pressure value in the air passage 15 though the air pressure detection member 18 after the inflating member 12 operates and the deflating member 14 is closed, and the control member 11 will detect the pressure value in the air passage 15 and compare it with the preset pressure value, and control the inflating member 12 to operate at a corresponding duty cycle based on the comparison so as to maintain a constant pressure within the air passage 15. Specifically, if the detected pressure value in the air passage is higher than the preset pressure value of 5 mmHg, the inflating member operates at a duty cycle of 10%; if the detected pressure value in the air passage is higher than the preset pressure value, and is not higher than 5mmHg at the same time, the inflating member operates at a duty cycle of 40%; if the detected pressure in the air passage is lower than the preset pressure value and not lower than 5mmHg at the same time, the inflating member operates at a duty cycle of 55%; otherwise, the inflating member operates at a duty cycle of 100% .
Preferably, the present invention may further comprise the following steps: detecting the cuff pressure with the air pressure detection member 18 after the inflating member 12 operates and the deflating member 14 is closed, and calculating the diastolic pressure in
2019101633 17 Dec 2019 combination with the control member 11, and using the value of diastolic pressure to replace the original preset pressure value. Specifically, when the inflating member 12 inflates the cuff 10 to a certain pressure value, the cuff deflates. If the air pressure detection member 18 detects an oscillation of pulse, the control member 11 adjusts the preset pressure value, which is reduced by 5 mmHg for example. The above detection process is repeated until the air pressure detection member 18 can not detect the pulse oscillation.
Preferably, the present invention may further comprise the following steps: after the cuff 10 is tied to the limb, press down the start button 21 to start the device, the deflating member 14 is closed; if the pressure selector 20 is pressed down, the preset pressure value may be selected; when the stop button 22 is pressed down, then the deflating member is opened, the air in the cuff is released, and the blood collection process ends.
The present invention has been described in detail, with reference to the preferred embodiment, in order to enable the reader to practice the invention without undue experimentation. However, a person having ordinary skill in the art will readily recognize that many of the previous disclosures may be varied or modified somewhat without departing from the spirit and scope of the invention. Accordingly, the intellectual property rights to this invention are defined only by the following claims.
Claims (5)
1. A pneumatic blood drawing device comprising a cuff, wherein the said pneumatic blood drawing device further comprises a control member, an inflating member mounted to the said control member, a deflating member and a time control member, an air passage is mounted between an air outlet portion of the said inflating member and the said cuff, the said deflating member is mounted to the said air outlet portion of the said inflating member, the said inflating member is adapted for inflating the said cuff by allowing the air to pass through the said air passage to the said cuff according to the preset pressure value inside the said cuff, the said time control member is adapted for measuring a preset time period of blood collection, the said control member is adapted for releasing the air inside the said cuff by deactivating the said inflating member and activating the said deflating member when the preset time period for blood collection has been reached, the said pneumatic blood drawing device further comprises an alarm member mounted to the said control member adapted for raising alarm for the remaining time period for blood collection, the said alarm member is a buzzer and/or a warning light, and the said buzzer is used to emit sounds of different frequencies to warn the remaining time period for blood collection. The warning light is adapted to emit various lights to alert the remaining time period for blood collection.
2. The pneumatic blood drawing device according to claim 1, wherein it further comprises an air pressure detection member for detecting the pressure value in the said air passage; the said air pressure detection member is mounted respectively to the said control member, and the air outlet portion of the said inflating member.
3. The pneumatic blood drawing device according to claim 2, wherein the said air pressure detection member comprises an air pressure sensor.
4. The pneumatic blood drawing device according to claim 2, wherein it further comprises a
2019101633 17 Dec 2019 display member for displaying information related to the blood collection process; the said display member is mounted to the said control member, the said display member comprises a display screen and/or a pressure indicator light, the said pneumatic blood drawing device further comprises a manual control member, the said manual control member is mounted to the control member for manual control of the device.
5. The pneumatic blood drawing device according to claim 4, wherein the said manual control member comprises a pressure selector and a switch button; the said pressure selector is adapted for selecting the preset pressure value, and the said switch button is adapted for activating and / or deactivating the device, the said cuff is provided with an air inlet, and the said air passage is detachably coupled to the said air inlet.
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| Application Number | Priority Date | Filing Date | Title |
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| AU2019101633A AU2019101633A4 (en) | 2019-12-17 | 2019-12-17 | A pneumatic blood drawing device |
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| AU2019101633A AU2019101633A4 (en) | 2019-12-17 | 2019-12-17 | A pneumatic blood drawing device |
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| AU2019101633A4 true AU2019101633A4 (en) | 2020-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2019101633A Ceased AU2019101633A4 (en) | 2019-12-17 | 2019-12-17 | A pneumatic blood drawing device |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2019101633A4 (en) |
-
2019
- 2019-12-17 AU AU2019101633A patent/AU2019101633A4/en not_active Ceased
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| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |