CN212698868U - Cerebral apoplexy hemiplegia patient is with early warning system of leaving bed based on gravity-feed tank - Google Patents
Cerebral apoplexy hemiplegia patient is with early warning system of leaving bed based on gravity-feed tank Download PDFInfo
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- CN212698868U CN212698868U CN202020329455.9U CN202020329455U CN212698868U CN 212698868 U CN212698868 U CN 212698868U CN 202020329455 U CN202020329455 U CN 202020329455U CN 212698868 U CN212698868 U CN 212698868U
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- bed
- mounting bar
- patient
- early warning
- pressure sensing
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- 206010019468 Hemiplegia Diseases 0.000 title claims abstract description 18
- 208000006011 Stroke Diseases 0.000 title claims abstract description 17
- 206010008190 Cerebrovascular accident Diseases 0.000 title claims abstract description 11
- 230000002490 cerebral effect Effects 0.000 title claims abstract description 11
- 238000013500 data storage Methods 0.000 claims abstract description 13
- 238000003860 storage Methods 0.000 claims abstract description 6
- 239000002390 adhesive tape Substances 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 11
- 230000004044 response Effects 0.000 claims description 2
- 210000001624 hip Anatomy 0.000 claims 1
- 238000000034 method Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 210000001217 buttock Anatomy 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
Images
Abstract
The utility model relates to a cerebral apoplexy hemiplegia patient is with early warning system from bed based on gravity-feed tank is answered, includes pressure sensing device at least, pressure sensing device is including being on a parallel with mounting bar and 3 at least pressure sensor that the width direction of the bed body set up, the mounting bar is provided with parallel arrangement's mounting groove and link up the recess along its length direction, install pressure sensor directly imbeds in the mounting bar, pressure sensing device passes through signal repeater and controller signal connection, stores and handles pressure signal through the treater. The utility model discloses a set up pressure sensor on the bed body, collect the pressure signal that the patient takes place the stage from the bed, the storage is at data storage and treater, and the pressure signal that takes place the stage when data storage and treater are collected matches with the pressure signal that the patient takes place the stage from the bed, reaches the predetermined threshold value promptly, sends the early warning in advance, and the effectual patient of avoiding falls from the bed.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to a cerebral apoplexy hemiplegia patient is with leaving bed early warning system based on gravity-feed tank.
Background
Currently, as china enters an aging society, elderly care has become a burden for families, with the most important being to monitor whether a user or patient is in their bed or whether a user or patient has got up and out of their bed. When a patient falls from a bed, the patient often fails to be rescued in time due to the fact that the patient cannot be found in time, and regrets or disputes are caused.
Patent document with publication number CN209356905U discloses a patient bed leaving alarm system, which belongs to the technical field of medical apparatus and instruments, and comprises a plurality of shoes special for double bed leaving, a plurality of bed leaving monitors and a monitoring switchboard; the off-bed monitor is installed in the off-bed special shoe and comprises a shell, a pressure sensor, a control module, a WIFI module, a voice playing module, a power supply module and a power switch; the pressure sensor, the WIFI module and the voice playing module are all connected with the control module, and the power supply module is connected with the control module through a power switch; the monitoring switchboard comprises a central processing unit, a communication module, a display module and an alarm module, wherein the communication module, the display module and the alarm module are all connected with the central processing unit, and the communication module is connected with the WIFI module through the internet; the utility model solves the problem that medical staff can not find some patients who are inconvenient to move and have no nursing without permission to leave the bed.
Patent document CN103824418A discloses an alarm system and a bed for bed leaving monitoring, an alarm device and an alarm method thereof. The alarm system for the bed leaving monitoring comprises two piezoelectric film sensors, a processor and an alarm. The two piezoelectric film sensors are sequentially laid on the bed along the extension direction of the long edge of the bed and synchronously and continuously acquire pressure signals from the bed. The processor respectively forms two periodic physiological characteristic signals of a human body on the bed according to the two pressure signals, judges that the human body falls off the bed when the two periodic physiological characteristic signals are synchronously interrupted, and judges that the human body automatically leaves the bed when the two periodic physiological characteristic signals are interrupted back and forth. The alarm gives an alarm prompt when falling off the bed. However, the application of the bed leaving alarm system is a remedial action after falling, which is mainly reflected in the aspect of alarm, namely, a patient may still fall when alarming, and no specific early warning measure is provided. Therefore, a need exists for a device which can give early warning in advance and has a certain buffering time, so that a guardian can quickly respond, and the danger that a human body falls off from a bed is prevented.
Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the inventor studied a lot of documents and patents when making the present invention, but the space did not list all details and contents in detail, however, this is by no means the present invention does not possess these prior art features, but on the contrary the present invention has possessed all features of the prior art, and the applicant reserves the right to increase the related prior art in the background art.
SUMMERY OF THE UTILITY MODEL
The word "module" as used herein describes any type of hardware, software, or combination of hardware and software that is capable of performing the functions associated with the "module".
Not enough to prior art, the utility model provides a hemiplegia patient is with early warning system from bed based on gravity-feed tank, include pressure sensing device at least, pressure sensing device installs first side and the second side at the bed body according to the mode of the axis symmetry each other about the bed body, wherein:
the pressure sensing device comprises a mounting bar and at least 3 pressure sensors, the mounting bar is parallel to the width direction of the bed body, the mounting bar is provided with mounting grooves which are arranged in parallel and penetrating grooves along the length direction of the mounting bar, and the pressure sensors are directly embedded in the mounting bar.
According to a preferred embodiment, the mounting groove on the mounting bar is in interference fit with the pressure sensor, a through groove parallel to the length direction is formed in the mounting bar, and the electrical connection line of the pressure sensor can be placed in the through groove.
According to a preferred embodiment, the pressure sensing devices arranged on the first and second sides are mounted on the bed at a first position corresponding to the back area of the patient, and the pressure sensing devices arranged on the first and second sides are mounted on the bed at a second position corresponding to the hip area of the patient, the first position being spaced apart from the edges defined by the first and second sides of the bed by 10-15cm, and the second position being spaced apart from the edges defined by the first and second sides of the bed by 10-15 cm.
According to a preferred embodiment, the pressure sensing device is detachably mounted on the mattress, two adhesive tapes are arranged on the pressure sensing device along the direction perpendicular to the length direction of the mounting strip, and the pressure sensing device is directly mounted on the mattress through the adhesive tapes.
According to a preferred embodiment, the side of the bed body is fixedly connected with a signal transponder and a power supply through a medical adhesive tape, and the power supply is an external fixed power supply or a storage battery.
According to a preferred embodiment, the controller comprises at least a data storage and processor, an alarm, a communication module, a console and a client, wherein the alarm is fixedly mounted on an outer door frame of the ward.
According to a preferred embodiment, the surface of the mounting strip, which is close to the bed body, is provided with anti-skid stripes, and the anti-skid stripes are integrally connected with the mounting strip.
The utility model also provides a cerebral apoplexy hemiplegia patient is with from bed early warning device, at least including the bed body, adjust backplate and cerebral apoplexy hemiplegia patient with from bed early warning system, wherein, cerebral apoplexy hemiplegia patient is with including pressure sensing device from bed early warning system at least, pressure sensing device installs the first side and the second side at the bed body according to the mode of the axis symmetry each other about the bed body, pressure sensing device including be on a parallel with the mounting bar and the at least 3 pressure sensor of the width direction setting of the bed body (the mounting bar is provided with parallel arrangement's mounting groove and runs through the recess along its length direction, pressure sensor installs with directly embedding in the mounting bar.
According to a preferred embodiment, the mounting groove on the mounting bar is in interference fit with the pressure sensor, a through groove parallel to the length direction is formed in the mounting bar, and the electrical connection line of the pressure sensor can be placed in the through groove.
According to a preferred embodiment, said pressure sensing means arranged on said first and second sides are mounted on said bed at a first position corresponding to the back area of the patient, said pressure sensing means arranged on said first and second sides are mounted on said bed at a second position corresponding to the hip area of the patient, said first position being at a distance of 10-15cm from the edge defined by the first side of the bed, said second position each being at a distance of 10-15cm from the edge defined by the second side of the bed.
The utility model has the advantages of:
1. different from the prior art, directly install the pressure sensing device who is made up by a plurality of pressure sensor on the region apart from the bed body edge 10-15cm, when data appears in a plurality of pressure sensor in buttock and back region, in time carry out the early warning, just can the drawback of police dispatch newspaper before having solved among the prior art effectively.
2. Adopt common medical adhesive tape to fix, the repeatedly usable and the simple to operate of device have been realized, design a plurality of pressure sensor and be a set of pressure sensing device, can realize a plurality of pressure sensor's in succession data production, can carry out one to the action of patient and predict, data appear as the single sensor that is close to bed body center line position only, and do not have follow-up outside sensor to follow when appearing data, can judge for normally standing up, can not take place to turn on one's side and fall down, consequently, the comprehensive early warning mode of multidata, can guarantee the accuracy of data collection, certain fault-tolerant rate has.
3. Adopt soft silica gel preparation to have the mounting bar of edge radian, can not only realize fine fixing on the bed body, the durability also is high, the repeated long-time use of being convenient for, above all, the fluctuation degree when fixing the bed body is little, and soft or hard degree is suitable, can follow and fluctuate mattress, has guaranteed the comfort level after the installation, can not cause the discomfort to user's normal rest.
Drawings
Fig. 1 is a schematic structural diagram of a preferred bed leaving early warning system of the present invention;
FIG. 2 is a schematic diagram of the modular connection of the preferred pressure sensing device, signal repeater and controller to the power supply of the present invention;
FIG. 3 is a schematic view of a preferred pressure sensing device according to the present invention; and
fig. 4 is a preferred simple circuit diagram of the present invention.
List of reference numerals
1: bed body 2: pressure sensing device 3: power supply
4: the signal repeater 5: the controller 6: data storage and processor
7: the communication module 8: an alarm 9: client terminal
10: the console 11: first position 12: second position
1 a: first side 1 b: second side 1 c: central axis
21: pressure sensor 22: mounting bar 23: adhesive tape
221: through groove 222: mounting groove 223: anti-slip stripe
Detailed Description
This is described in detail below with reference to fig. 1-4.
Example 1
As shown in fig. 1 and fig. 2, the utility model discloses a cerebral apoplexy hemiplegia patient is with leaving bed early warning system based on gravity-feed tank is including four at least pressure sensing device 2 at least, and these four at least pressure sensing device 2 are installed at the first side 1a and the second side 1b of the bed body 1 according to the mode of symmetry each other about the axis 1c of the bed body 1, pressure sensing device 2 and 4 electric connection of signal repeater, and the side at the bed body 1 is installed to signal repeater 4.
According to a specific embodiment, the pressure sensing device 2 is in a long strip shape and is arranged in a direction parallel to the width direction of the bed body 1, the pressure sensing device 2 at least comprises 3 pressure sensors 21 and a mounting bar 22, the mounting bar is provided with a mounting groove 222 and a through groove 221 which are arranged in parallel along the length direction of the mounting bar, and the pressure sensors 21 are directly embedded in the mounting bar 22.
Preferably, the mounting groove 222 on the mounting bar 22 is in interference fit with the pressure sensor 21, the mounting bar 22 is provided with a through groove 221 parallel to the length direction, and when the pressure sensor 21 is mounted, the electrical connection line of the pressure sensor 21 is placed in the through groove 221 to avoid the messy and winding of the connection lines of the pressure sensors 12. Convenient repeated dismantlement installation many times.
Preferably, the pressure sensing device 2 arranged on the first side 1a is arranged on a first position 11 of the bed 1 corresponding to the back area of the patient, the pressure sensing device 2 arranged on the first side 1a is arranged on a second position 12 of the bed corresponding to the hip area of the patient, the distance between the first position 11 and the edge defined by the first side 1a of the bed 1 is 10-15cm, and the distance between the second position 12 and the edge defined by the first side 1a of the bed 1 is 10-15 cm; the pressure sensing device 2 arranged on the second side 1b is arranged on a first position 11 of the bed body 1 corresponding to the back area of the patient, the pressure sensing device 2 arranged on the second side 1b is arranged on a second position 12 of the bed body corresponding to the hip area of the patient, the distance between the first position 11 and the edge defined by the second side 1b of the bed body 1 is 10-15cm, and the distance between the second position 12 and the edge defined by the second side 1b of the bed body 1 is 10-15 cm.
Preferably, the pressure sensing device 2 is detachably mounted on the mattress, two adhesive tapes 23 are arranged on the pressure sensing device 2 in the direction perpendicular to the length direction of the mounting strip 22, the adhesive tapes 23 are conventional medical adhesive tapes, the pressure sensing device 2 is directly fixed on the bed body 1 through the adhesive tapes 23, the mounting strip 22 is close to the anti-skid stripes on one surface of the bed body 1, the friction force between the mounting strip 22 and the bed body 1 is increased, and the possibility of position sliding of the mounting strip 22 under the action of external force is reduced.
Preferably, signal repeater 4 adopts wireless signal to be connected with controller 5, and signal repeater 4 and power 3 are installed in 1 side of bed body with the detachable mode, can directly twine fixedly through medical sticky tape, directly tear winding medical sticky tape during the dismantlement, only need change during used repeatedly medical sticky tape and fix.
Preferably, as shown in fig. 4, the controller 5 includes a data storage and processor 6, an alarm 8, a communication module 7, a console 10 and a client 9, and the signal repeater 4 is first connected to the data storage and processor 6 through wireless communication to realize connection with the controller 5. The utility model relates to a signal repeater 4, controller 5, data storage and treater 6, alarm 8, communication module 7, control cabinet 10 and customer end 9 and connection and control thereof are the prior art that patent document and publication number CN103824418A patent document that publication number is CN209356905U disclose. The utility model discloses for above prior art's improvement lie in utilizing a plurality of pressure sensor parallel arrangement's mode to constitute pressure sensing device, improve the accuracy of data and realize advancing of early warning, still have certain fault-tolerant rate in addition, but do not relate to the improvement of electron device control mode and software, can know according to the patent document that publication number is CN209356905U and the patent document that publication number is CN103824418A, the system that this application adopted is according to prior art direct conversion coming, and need not carry out special design.
Preferably, the data storage and processor 6 is directly connected to the alarm 8, and the console 10 and the client 9 are connected to the data storage and processor 6 through the communication module 7. When pressure sensor 2 gathered user's pressure signal to with pressure signal transmission to signal repeater 4, signal repeater 4 forwarded the signal to controller 5, judge through data storage and treater 6 whether pressure reaches the early warning threshold value, surpass the threshold value then make the early warning through alarm 8 and communication module 7, wherein, alarm 8 fixed mounting can make things convenient for medical personnel's easier acquisition early warning information on the outer door frame in ward.
Preferably, the pressure sensing device 2, the signal repeater 4 and the controller 5 are electrically connected with the power supply 3, the power supply 3 at least comprises an external fixed power supply or a storage battery, wherein the pressure sensing device 2 and the signal repeater 4 are directly connected with the external fixed power supply or the storage battery, the controller 5 can be connected with the same or different storage batteries or can be directly connected with an alternating current power supply, and the alarm 8 is independently connected with a power supply.
Preferably, the console can be combined with the pressure signal in the actual bed leaving process according to the height, weight and other human body information of the patient, so that the alarm threshold value is modified, personalized setting is realized, and meanwhile, the early warning error rate is reduced. In addition, when the pressure sensing device 2 collects the pressure signals, the data storage and processor 6 synchronously and continuously collects the pressure signals from the bed and respectively matches the pressure signals with the stored characteristic pressure signals of the posture of the human body on the bed, and when the pressure signals are matched with the pressure signals of the posture possibly leaving the bed, the data storage and processor sends out early warning signals.
Example 2
As shown in fig. 1 and fig. 2, the utility model discloses a cerebral apoplexy hemiplegia patient is with leaving bed early warning system based on gravity-feed tank is including four at least pressure sensing device 2 at least, and these four at least pressure sensing device 2 are installed at the first side 1a and the second side 1b of the bed body 1 according to the mode of symmetry each other about the axis 1c of the bed body 1, pressure sensing device 2 and 4 electric connection of signal repeater, and the side at the bed body 1 is installed to signal repeater 4.
According to a specific embodiment, the pressure sensing device 2 is in a long strip shape and is arranged in a direction parallel to the width direction of the bed body 1, the pressure sensing device 2 at least comprises 3 pressure sensors 21 and a mounting bar 22, the mounting bar is provided with a mounting groove 222 and a through groove 221 which are arranged in parallel along the length direction of the mounting bar, and the pressure sensors 21 are directly embedded in the mounting bar 22.
Preferably, the mounting groove 222 on the mounting bar 22 is in interference fit with the pressure sensor 21, the mounting bar 22 is provided with a through groove 221 parallel to the length direction, and when the pressure sensor 21 is mounted, the electrical connection line of the pressure sensor 21 is placed in the through groove 221 to avoid the messy and winding of the connection lines of the pressure sensors 12. Convenient repeated dismantlement installation many times.
Preferably, pressure sensing device 2 installs respectively on the bed body 1 and the regional corresponding first position 11 of patient back and the bed body and the regional corresponding second position 12 of patient buttock, first position 11 and second position 12 all are 10-15cm with the distance of the 1 both sides edge of the bed body, the restriction of two regional conditions, two first positions 11 and two second positions 12 have been formed on the bed body, through the collection of multizone multiunit data, guarantee the rate of accuracy of the data of gathering, in time there is single pressure sensor damage or the inefficacy still can be fine to data acquisition, realize the early warning, the fault tolerance rate has been improved.
In order to facilitate understanding, the utility model relates to a cerebral apoplexy hemiplegia patient is discussed with theory of operation and application method of leaving bed early warning system based on gravity-feed tank.
When the device is used, the pressure sensing devices are respectively arranged on a first position of the bed body 1 corresponding to the back area of a patient and a second position of the bed body corresponding to the hip area of the patient, the distance between the first position and the second position and the two side edges of the bed body 1 is 10-15cm, two first positions and two second positions are formed on the bed body under the limitation of two area conditions, one or more pressure sensing devices can be placed on each position according to requirements, in the detection process, when data feedback occurs on a plurality of pressure sensors in the pressure sensing devices in the two areas on the same side, the system can give out early warning, but when only one area or the same pressure sensing device has data only on the pressure sensor close to the center line of the bed body, no early warning can be given out when no subsequent data occurs within three seconds, the data is only stored and can be considered as normal turning activities of the person. The multi-data acquisition and early warning mode can effectively avoid danger caused by damage of a single pressure sensor and realize early warning through advanced data, is different from the defects that the prior art can only carry out early warning at the moment of falling and cannot carry out real-time early warning, can well give a response time to related medical personnel, and greatly improves the data fault tolerance rate of the device due to the composition of multiple elements.
It should be noted that the above-mentioned embodiments are exemplary, and those skilled in the art can devise various solutions in light of the present disclosure, which are also within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present specification and drawings are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.
Claims (7)
1. A cerebral apoplexy hemiplegia patient is with early warning system of leaving bed based on gravity-feed tank response, includes pressure sensing device (2) at least, characterized in that, pressure sensing device (2) sets up in first side (1a) and second side (1b) of bed body (1), wherein,
the pressure sensing device (2) comprises a mounting bar (22) and at least 3 pressure sensors (21), wherein the mounting bar (22) is parallel to the width direction of the bed body (1), the mounting bar is provided with mounting grooves (222) and through grooves (221) which are arranged in parallel along the length direction of the mounting bar, and the pressure sensors (21) are directly embedded in the mounting bar (22).
2. The system for early warning of leaving bed for stroke hemiplegia patient as claimed in claim 1, wherein the mounting groove (222) on the mounting bar (22) is in interference fit with the pressure sensor (21), a through groove (221) parallel to the length direction is formed on the mounting bar (22), and an electrical connection wire of the pressure sensor (21) can be placed in the through groove (221).
3. The system for early warning of a stroke hemiplegia patient as claimed in claim 2, wherein the pressure sensing devices (2) disposed on the first side (1a) and the second side (1b) are installed on a first position (11) of the bed body (1) corresponding to the back region of the patient, the pressure sensing devices (2) disposed on the first side (1a) and the second side (1b) are installed on a second position (12) of the bed body corresponding to the hip region of the patient, the first position (11) is 10-15cm away from the edges defined by the first side (1a) and the second side (1b) of the bed body (1), and the second position (12) is 10-15cm away from the edges defined by the first side (1a) and the second side (1b) of the bed body (1).
4. The bed-leaving early warning system for the stroke hemiplegia patient as claimed in claim 3, wherein the pressure sensing device (2) is provided with two adhesive tapes (23) along the direction perpendicular to the length direction of the mounting bar (22), and the pressure sensing device (2) is directly mounted on the mattress through the adhesive tapes (23).
5. The bed-leaving early warning system for the stroke hemiplegia patient as claimed in claim 1, wherein the side of the bed body (1) is fixedly connected with a signal transponder (4) and a power supply (3) through a medical adhesive tape, the signal transponder (4) is in signal connection with the controller (5), and the power supply (3) is an external fixed power supply or a storage battery.
6. The system for warning the patient with stroke hemiplegia to get out of bed as claimed in claim 5, wherein the controller (5) comprises at least a data storage and processor (6), an alarm (8), a communication module (7), a console (10) and a client (9), wherein the alarm (8) is fixedly installed on the outer door frame of the ward.
7. The bed-leaving early warning system for the stroke hemiplegia patient as claimed in claim 1, wherein an anti-slip strip (223) is arranged on one surface of the mounting bar (22) close to the bed body (1), and the anti-slip strip (223) is integrally connected with the mounting bar (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020329455.9U CN212698868U (en) | 2020-03-16 | 2020-03-16 | Cerebral apoplexy hemiplegia patient is with early warning system of leaving bed based on gravity-feed tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020329455.9U CN212698868U (en) | 2020-03-16 | 2020-03-16 | Cerebral apoplexy hemiplegia patient is with early warning system of leaving bed based on gravity-feed tank |
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| Publication Number | Publication Date |
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| CN212698868U true CN212698868U (en) | 2021-03-16 |
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ID=74904651
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020329455.9U Expired - Fee Related CN212698868U (en) | 2020-03-16 | 2020-03-16 | Cerebral apoplexy hemiplegia patient is with early warning system of leaving bed based on gravity-feed tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212698868U (en) |
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2020
- 2020-03-16 CN CN202020329455.9U patent/CN212698868U/en not_active Expired - Fee Related
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Granted publication date: 20210316 |