CN204232699U - A kind of mattress of Measure blood pressure - Google Patents
A kind of mattress of Measure blood pressure Download PDFInfo
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- CN204232699U CN204232699U CN201420735789.0U CN201420735789U CN204232699U CN 204232699 U CN204232699 U CN 204232699U CN 201420735789 U CN201420735789 U CN 201420735789U CN 204232699 U CN204232699 U CN 204232699U
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Abstract
The utility model provides a kind of mattress of Measure blood pressure, comprise mattress body, the first electrode, the second electrode, finger ring and signal processor, wherein: this first electrode and this second electrode are positioned at the upper surface of this mattress body, and have interval between this first electrode and this second electrode; This signal processor is connected with this finger ring with this first electrode, this second electrode, for the treatment of the electrode signal from this first electrode and this second electrode and the photoplethaysmography signal from this finger ring and according to this electrode signal and this photoplethaysmography signal generation pressure value.As long as user couches on above-mentioned mattress, can facilitate and the blood pressure of monitor user.This mattress, carrying out in monitoring of blood pressure process to user, not to the constraint of user action, brings good Consumer's Experience to user.
Description
Technical field
The utility model relates to field of medical products, particularly, relates to a kind of mattress of Measure blood pressure.
Background technology
Along with the raising day by day of living standard, people more and more pay attention to for the health status of self.Particularly there is the people of health problem in some healths, and it may wish some physiological parameters of monitoring human constantly.Such as, for the patient of angiocardiopathy, it may be wished by measurement mechanism Monitoring of blood pressure constantly.
At present, there is various measurement mechanism for measuring the blood pressure of human body easily.But these measurement mechanisms generally include can the cuff of inflation/deflation.In use, need cuff to be wound around user arm and to cuff inflation/deflation.The cuff internal gas pressure value detected by the pressure sensor be placed in cuff determines the blood pressure of user.If this using method is applied to the user in sleep, then will inevitably bring sleep interference to user.Which results in poor Consumer's Experience.
Utility model content
According to an aspect of the present utility model, provide a kind of mattress of Measure blood pressure.The mattress of this Measure blood pressure, comprises mattress body, the first electrode, the second electrode, finger ring and signal processor, wherein: this first electrode and this second electrode are positioned at the upper surface of this mattress body, and have interval between this first electrode and this second electrode; This signal processor is connected with this finger ring with this first electrode, this second electrode, for the treatment of the electrode signal from this first electrode and this second electrode and the photoplethaysmography signal from this finger ring and according to this electrode signal and this photoplethaysmography signal generation pressure value.
According to the utility model specific embodiment, this first electrode and this second electrode are rectangle and parallel to each other, and this first electrode is parallel with the head of this mattress with this second electrode.
Alternatively, the width of this first electrode and this second electrode is 9 centimetres to 12 centimetres.
Alternatively, this interval is 13 centimetres to 20 centimetres.
According to the utility model specific embodiment, this finger ring comprises light-emitting device and optical pickup apparatus, and this light-emitting device is used for light to inject finger tip; This optical pickup apparatus is for detecting light also this this photoplethaysmography signal of photogenerated from finger tip transmission of basis from finger tip transmission.
According to the utility model specific embodiment, this mattress also comprises electromagnetic shield, the lower surface being positioned at this mattress body at least partially of this electromagnetic shield, described electromagnetic shield and described first electrode and described second electrode insulation.
According to the utility model specific embodiment, the part that this electromagnetic shield is positioned at the lower surface of this mattress body covers the whole lower surface of this mattress body.
According to the utility model specific embodiment, this electromagnetic shield prolongs the head of this mattress body from the lower surface of this mattress body and/or afterbody extends to the upper surface of this mattress body with the width of this electromagnetic shield.
According to the utility model specific embodiment, this electromagnetic shield is identical with the width of this mattress body, and the part that this electromagnetic shield is positioned at the upper surface of this mattress body is positioned at the lower surface of this mattress body on dual-side part with this electromagnetic shield is completely closed.
According to the utility model specific embodiment, this signal processor embeds in this mattress body.
As long as user couches on above-mentioned mattress, can facilitate and the blood pressure of monitor user.This mattress, carrying out in monitoring of blood pressure process to user, not to the constraint of user action, brings good Consumer's Experience to user.
In utility model content, introduce the concept of a series of reduced form, this will further describe in detailed description of the invention part.The utility model content part does not also mean that the key feature and essential features that will attempt to limit technical scheme required for protection, does not more mean that the protection domain attempting to determine technical scheme required for protection.
Below in conjunction with accompanying drawing, describe advantage of the present utility model and feature in detail.
Accompanying drawing explanation
Following accompanying drawing of the present utility model in this as a part of the present utility model for understanding the utility model.Shown in the drawings of embodiment of the present utility model and description thereof, be used for explaining principle of the present utility model.In the accompanying drawings,
Fig. 1 is the schematic diagram of the mattress of Measure blood pressure according to the utility model specific embodiment;
Fig. 2 is the schematic diagram of the mattress of Measure blood pressure according to another specific embodiment of the utility model;
Fig. 3 a to Fig. 3 f respectively illustrates the electro-cardiologic signal waveforms figure of the user A utilizing different mattress to gather;
Fig. 4 a to Fig. 4 f respectively illustrates the electro-cardiologic signal waveforms figure of the user B utilizing different mattress to gather;
Fig. 5 a to Fig. 5 g respectively illustrates the electro-cardiologic signal waveforms figure of the user A utilizing different mattress to gather;
Fig. 6 a to Fig. 6 g respectively illustrates the electro-cardiologic signal waveforms figure of the user B utilizing different mattress to gather;
Fig. 7 is the schematic diagram of the mattress of Measure blood pressure according to another specific embodiment of the utility model; And
Fig. 8 a and Fig. 8 b is top view and the sectional view of the mattress of Measure blood pressure according to another specific embodiment of the utility model.
Detailed description of the invention
In the following description, a large amount of details is provided the utility model can be understood up hill and dale.But those skilled in the art can understand, following description only relates to preferred embodiment of the present utility model, and the utility model can be implemented without the need to one or more such details.In addition, in order to avoid obscuring with the utility model, technical characteristics more well known in the art are not described.
According to an aspect of the present utility model, provide a kind of mattress of Measure blood pressure.This mattress can be placed on the bed of hospital or family.User can wear nightwear and directly to overlie or alternating floor sheet is overlied.This mattress can measure the blood pressure of the user couched thereon.
Fig. 1 shows the mattress 100 of the Measure blood pressure according to the utility model specific embodiment.As shown in Figure 1, this mattress 100 comprises mattress body 101, first electrode 102, second electrode 103, finger ring 104 and signal processor 105.
First electrode 102 and the second electrode 103 are positioned at the upper surface of mattress body 101, and have interval between the first electrode 102 and the second electrode 103.
Electrocardiosignal is typical body electrical signals, and it is the concentrated expression of the countless Electrical Activity of Myocardial Cells of heart.Electrocardiosignal has objectively responded the physiological situation at each position of heart to a certain extent, and it has close association with the pressure value of human body.Electrocardiosignal shows as potential difference signal at body surface.In specific embodiment of the utility model, the first electrode 102 and the second electrode 103 is utilized to carry out the electrocardiosignal of monitoring human.When mattress 100 in use, user couches usually in the position making heart between the first electrode 102 and the second electrode 103, thus makes the first electrode 102 and the second electrode 103 measure the potential difference of upper and lower two positions of heart.First electrode 102 can have comparatively high input impedance.Second electrode 103 can as reference electrode.First electrode 102 and the second electrode 103 can form the electric capacity that one can be detected potential difference signal, to generate electrode signal according to electrocardiosignal.Thus, electrode signal can show the systaltic time.
Finger ring 104 can obtain the pulsating nature change that the microvascular volumetric blood in periphery produces with heart fluctuation by the absorbing amount tracing tested finger tip in real time.Pulsation causes the change of CBF in blood vessel.The change of this CBF causes the change of the light of institute's transmission.Therefore, by detecting the light from finger tip transmission, pulsation situation can be obtained.Namely the photoplethaysmography signal that finger ring 104 generates have expressed this pulsation situation.Easy understand, this pulsation situation can show that pulse wave arrives the time of finger tip.Alternatively, finger ring 104 is flexible, to facilitate user to wear, extracts.
Signal processor 105 is connected with finger ring 104 with the first electrode 102, second electrode 103, for the treatment of the electrode signal from the first electrode 102 and the second electrode 103 and the photoplethaysmography signal from finger ring 104 and according to this electrode signal and this photoplethaysmography signal generation pressure value.As mentioned above, electrode signal can show the systaltic time.Photoplethaysmography signal can show that pulse wave arrives the time of finger tip.Signal processor 105 can calculate the time difference of heart contraction and pulse wave arrival finger tip according to electrode signal and photoplethaysmography signal, i.e. the pulse wave transmission time.Then, can according to the pressure value of pulse wave transmission time and the regression equation calculation set up in advance user.
One of ordinary skill in the art will appreciate that, the term " connection " in the utility model can be that physical connection or logic connect, such as, and wired connection and wireless connections.Such as, finger ring 104 can by bluetooth by photoplethaysmography Signal transmissions to signal processor 105.Again such as, the Signal transmissions between finger ring 104 and signal processor 105 can be undertaken by RF-wise.Thus, avoid physical circuit to the loose-jointed constraint of user.
As long as user couches on above-mentioned mattress 100, can facilitate and the blood pressure of monitor user, and without the need to the arm that cuff is wound into user and to cuff inflation/deflation.This mattress 100, carrying out in monitoring of blood pressure process to user, not to the constraint of user action, brings good Consumer's Experience to user, particularly for the user in sleep.
According to a specific embodiment, as shown in Figure 1, the first electrode 102 and the second electrode 103 can be rectangle and parallel to each other, and the first electrode 102 can be parallel with the head of mattress 100 with the second electrode 103.In the utility model, when mattress uses, the part corresponding with the head of a bed is called the head of mattress.Human ecg signal is a kind of weak electric signal.Electrocardiosignal can be subject to the interference of various noise usually, the interference of such as human motion.In the present embodiment, the first electrode 102 and the second electrode 103 are rectangle and are an entirety respectively.This allows human body to stand up on mattress 100, keeps human body to have larger area with the first electrode 102 with the second electrode 103 simultaneously and contacts.First electrode 102 and the second electrode 103 are parallel to each other, and the first electrode 102 is parallel with the head of mattress 100 with the second electrode 103.This makes the interval between the first electrode 102 and the second electrode 103 remain unchanged.Like this, human body stands up the measurement result that action can not affect EGC parameter on mattress 100, effectively ensure that the accuracy of measurement result.
Fig. 2 shows the mattress 200 according to the Measure blood pressure of another specific embodiment of the utility model.This mattress 200 comprises mattress body 201, first electrode 202, second electrode 203, finger ring 204 and signal processor 205.Wherein, the function of mattress body 201, finger ring 204 and signal processor 205 and structure respectively with function and the similar of above mattress body 101, finger ring 104 and signal processor 105 described in detail.For simplicity, do not repeat them here.In mattress 200, the first electrode 202 and the second electrode 203 are arrays of multiple sub-electrodes of electrical connection.Because the reduction of electrode area, this implementation of mattress 200 is made more to save material.
Experimental data shows, the numerical value of the width W a of the first electrode and the width W b of the second electrode has remarkable impact for the measurement of electrocardiosignal, and then has remarkable impact to the measurement of blood pressure, only illustrates with Fig. 3 a to Fig. 3 f and Fig. 4 a to Fig. 4 f at this.Fig. 3 a to Fig. 3 f respectively illustrates the electro-cardiologic signal waveforms figure of the user A utilizing different mattress to gather; Fig. 4 a to Fig. 4 f respectively illustrates the electro-cardiologic signal waveforms figure of the user B utilizing different mattress to gather.Wherein the longitudinal axis of oscillogram represents the voltage characterizing electrocardiosignal intensity, the horizontal axis representing time of oscillogram.The difference of mattress is that the width of mattress electrode is different.Fig. 3 a and the oscillogram shown in Fig. 4 a are that the mattress that the width W a of employing first electrode and the width W b of the second electrode are 18 centimetres gathers, and wherein crest value is about 2.8.Fig. 3 b and the oscillogram shown in Fig. 4 b are that the mattress that the width W a of employing first electrode and the width W b of the second electrode are 15 centimetres gathers, and wherein crest value is about 2.6 volts.Fig. 3 c and the oscillogram shown in Fig. 4 c are that the mattress that the width W a of employing first electrode and the width W b of the second electrode are 12 centimetres gathers, and wherein crest value is about 2.0 volts.Fig. 3 d and the oscillogram shown in Fig. 4 d are that the mattress that the width W a of employing first electrode and the width W b of the second electrode are 9 centimetres gathers, and wherein crest value is about 1.7 volts.Fig. 3 e and the oscillogram shown in Fig. 4 e are that the mattress that the width W a of employing first electrode and the width W b of the second electrode are 7 centimetres gathers, and wherein crest value is about 1.0 volts.Fig. 3 f and the oscillogram shown in Fig. 4 f are that the mattress that the width W a of employing first electrode and the width W b of the second electrode are 4.5 centimetres gathers, and wherein crest value is about 0.5 volt.
On the one hand, the first electrode and the second electrode need the two ends laying respectively at user's heart in use, and the distance of the upper end of heart and shoulder is limited.So the width of electrode is subject to the restriction of this distance.On the other hand, within the specific limits, the width of electrode is wider, then the contact area of electrode and human body is larger, and electro-cardiologic signal waveforms is more clear, without clutter, and then is more conducive to correct measurement blood pressure.Such as, the width of electrode is less than 7 centimetres, then the crest value that mattress gathers may be less than 1.0 volts, and this causes puzzlement by giving the measurement validity of blood pressure.Again on the one hand, the width of electrode is wider, then need more material to manufacture electrode, which increase the manufacturing cost of mattress.Balance measurement result and cost, the width W a of the first electrode and the width W b of the second electrode may be selected to be 7 centimetres to 18 centimetres.Alternatively, the width W a of the first electrode is identical with the width W b of the second electrode.
Can notice from above measurement data, the crest value that the mattress that electrode width is 9 centimetres gathers is about 1.7 volts, and this value for blood pressure measurement be enough.In addition, if the width of electrode continues to increase from 12 centimetres, crest value does not correspondingly significantly increase.Based on this, preferably, the width W a of the first electrode and the width W b of the second electrode is 9 centimetres to 12 centimetres.
Fig. 5 a to Fig. 5 g respectively illustrates the electro-cardiologic signal waveforms figure of the user A utilizing different mattress to gather; Fig. 6 a to Fig. 6 g respectively illustrates the electro-cardiologic signal waveforms figure of the user B utilizing different mattress to gather.Wherein the longitudinal axis of oscillogram represents the voltage characterizing electrocardiosignal intensity, the horizontal axis representing time of oscillogram.Interval Wi between the electrode that the difference of mattress is mattress is different.Fig. 5 a and the oscillogram shown in Fig. 6 a adopt the interval Wi between electrode to gather for the mattress of 30 centimetres, and wherein crest value is about 0.9 volt.Fig. 5 b and the oscillogram shown in Fig. 6 b adopt the interval Wi between electrode to gather for the mattress of 25 centimetres, and wherein crest value is about 1.0 volts.Fig. 5 c and the oscillogram shown in Fig. 6 c adopt the interval Wi between electrode to gather for the mattress of 20 centimetres, and wherein crest value is about 1.3 volts.Fig. 5 d and the oscillogram shown in Fig. 6 d adopt the interval Wi between electrode to gather for the mattress of 15 centimetres, and wherein crest value is about 2.0 volts.Fig. 5 e and the oscillogram shown in Fig. 6 e adopt the interval Wi between electrode to gather for the mattress of 13 centimetres, and wherein crest value is about 1.2 volts.Fig. 5 f and the oscillogram shown in Fig. 6 f adopt the interval Wi between electrode to gather for the mattress of 11 centimetres, and wherein crest value is about 1.0 volts.Fig. 5 g and the oscillogram shown in Fig. 6 g adopt the interval Wi between electrode to gather for the mattress of 9 centimetres, and wherein crest value is about 0.9 volt.
Experimental data shows, the numerical value of interval Wi has remarkable impact for the measurement of gathered electrocardiosignal, and then has remarkable impact to the measurement of blood pressure.The signal quality that the upper/lower terminal that first electrode of collection electrocardiosignal and the second electrode lay respectively at heart obtains is best.Wi wide or narrow meeting in interval causes that signal noise is too many or wave amplitude is too little.Therefore, the interval Wi between the first electrode and the second electrode can be 11 centimetres to 25 centimetres.Preferably, this interval Wi is 13 centimetres to 20 centimetres.
According to a specific embodiment, the first electrode and the second electrode can be made up of conductive material.It not only can also can be fitted with mattress body with human body capacitive coupling physically preferably.
According to the utility model specific embodiment, finger ring can comprise based on biomedical measuring unit.This measuring unit can comprise light-emitting device and optical pickup apparatus.Light-emitting device may be used for light to inject finger tip.This light-emitting device such as light emitting diode.Preferably, the wave-length coverage of light emitting diode is 800 ~ 960nm.Optical pickup apparatus for detecting the light from this finger tip transmission, and according to the above-mentioned photoplethaysmography signal of this photogenerated.Can comprise light-sensitive device in optical pickup apparatus, such as, photo resistance etc., photodiode etc., detected optical signal can be converted to the signal of telecommunication by it.The implementation of this finger ring is simple and effective.
According to a specific embodiment, signal processor can embed in mattress body.Such as, the side being close to mattress body embeds mattress body.In the utility model, the side of mattress body refers to the limit corresponding with the sidepiece of bed when mattress uses.Embedded by signal processor in mattress body, when can not couch to user because of the existence of signal processor, comfort level causes harmful effect, ensure that Consumer's Experience is good.
According to a specific embodiment, mattress also comprises electromagnetic shield, the lower surface being positioned at mattress body at least partially of this electromagnetic shield, this electromagnetic shield and the first electrode and the second electrode insulation.Fig. 7 is the schematic diagram of the mattress 700 according to the Measure blood pressure of another specific embodiment of the utility model.Mattress 700 is similar with mattress 100, and its difference is that mattress 700 also comprises electromagnetic shield 706.Electromagnetic shield 706 effectively can shield the electromagnetic radiation of the first electrode 702 and the second electrode 703 surrounding environment.Block Electromagnetic Wave Propagation approach by electromagnetic shield 706, the first electrode 702 and the second electrode 703 are measured more accurate, and then the blood pressure measurement of mattress 700 is more accurate.Preferably, the part that electromagnetic shield is positioned at the lower surface of mattress body covers the whole lower surface of this mattress body, to provide more perfect electromagnetic shielding.
Alternatively, electromagnetic shield prolongs the head of this mattress body from the lower surface of mattress body and/or afterbody extends to the upper surface of this mattress body with the width of this electromagnetic shield.Fig. 8 a and Fig. 8 b respectively illustrates top view according to the mattress 800 of the other embodiment of the utility model and sectional view.Mattress 800 is similar with mattress 700, and difference is that the electromagnetic shield 806 of mattress 800 prolongs mattress body 801 afterbody from the lower surface of mattress body 801 extends to the upper surface of this mattress body 801 with the width D of this electromagnetic shield 806.Integrally, its inside does not have obvious gap to electromagnetic shield 806, further ensures the effectiveness of electromagnetic shield 806.
Alternatively, electromagnetic shield is identical with the width of mattress body, and the part that this electromagnetic shield is positioned at the upper surface of this mattress body is positioned at the lower surface of this mattress body on dual-side part with this electromagnetic shield is completely closed.Such as, the part that this electromagnetic shield can be positioned at the upper surface of this mattress body is stitched together with the part of the lower surface being positioned at this mattress body.Again such as, by electromagnetic shield one-shot forming.This ensure that electromagnetic shield the part of mattress body upper surface and between the part of mattress body lower surface without any gap, enhance the shield effectiveness of electromagnetic shield, further ensure the accuracy of measurement of blood pressure.
The utility model is illustrated by above-described embodiment, but should be understood that, above-described embodiment just for the object of illustrating and illustrate, and is not intended to the utility model to be limited in described scope of embodiments.In addition it will be understood by those skilled in the art that; the utility model is not limited to above-described embodiment; more kinds of variants and modifications can also be made, within these variants and modifications all drop on the utility model scope required for protection according to instruction of the present utility model.Protection domain of the present utility model defined by the appended claims and equivalent scope thereof.
Claims (10)
1. a mattress for Measure blood pressure, is characterized in that, comprises mattress body, the first electrode, the second electrode, finger ring and signal processor, wherein:
Described first electrode and described second electrode are positioned at the upper surface of described mattress body, and have interval between described first electrode and described second electrode;
Described signal processor is connected with described finger ring with described first electrode, described second electrode, for the treatment of the electrode signal from described first electrode and described second electrode and the photoplethaysmography signal from described finger ring and according to described electrode signal and described photoplethaysmography signal generation pressure value.
2. mattress as claimed in claim 1, is characterized in that, described first electrode and described second electrode are rectangle and parallel to each other, and described first electrode is parallel with the head of described mattress with described second electrode.
3. mattress as claimed in claim 2, it is characterized in that, the width of described first electrode and described second electrode is 9 centimetres to 12 centimetres.
4. mattress as claimed in claim 2, it is characterized in that, described interval is 13 centimetres to 20 centimetres.
5. mattress as claimed in claim 1, it is characterized in that, described finger ring comprises light-emitting device and optical pickup apparatus,
Described light-emitting device is used for light to inject finger tip;
Described optical pickup apparatus for detect light from described finger tip transmission and according to the described photogenerated from described finger tip transmission photoplethaysmography signal.
6. mattress as claimed in claim 1, it is characterized in that, described mattress also comprises electromagnetic shield, the lower surface being positioned at described mattress body at least partially of described electromagnetic shield, described electromagnetic shield and described first electrode and described second electrode insulation.
7. mattress as claimed in claim 6, is characterized in that, the part that described electromagnetic shield is positioned at the lower surface of described mattress body covers the whole lower surface of described mattress body.
8. mattress as claimed in claim 6, is characterized in that, described electromagnetic shield prolongs the head of described mattress body from the lower surface of described mattress body and/or afterbody extends to the upper surface of described mattress body with the width of described electromagnetic shield.
9. mattress as claimed in claim 8, it is characterized in that, described electromagnetic shield is identical with the width of described mattress body, and the part that described electromagnetic shield is positioned at the upper surface of described mattress body is positioned at the lower surface of described mattress body on dual-side part with described electromagnetic shield is completely closed.
10. mattress as claimed in claim 1, it is characterized in that, described signal processor embeds in described mattress body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420735789.0U CN204232699U (en) | 2014-11-28 | 2014-11-28 | A kind of mattress of Measure blood pressure |
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| CN201420735789.0U CN204232699U (en) | 2014-11-28 | 2014-11-28 | A kind of mattress of Measure blood pressure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106691434A (en) * | 2017-01-20 | 2017-05-24 | 深圳诺康医疗设备股份有限公司 | Physiological parameter detection system |
| CN106725392A (en) * | 2017-01-20 | 2017-05-31 | 深圳诺康医疗设备股份有限公司 | blood pressure detecting system and method |
| US11134853B2 (en) | 2015-03-31 | 2021-10-05 | Vita-Course Technologies Co., Ltd. | System and method for blood pressure monitoring |
-
2014
- 2014-11-28 CN CN201420735789.0U patent/CN204232699U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11134853B2 (en) | 2015-03-31 | 2021-10-05 | Vita-Course Technologies Co., Ltd. | System and method for blood pressure monitoring |
| CN106691434A (en) * | 2017-01-20 | 2017-05-24 | 深圳诺康医疗设备股份有限公司 | Physiological parameter detection system |
| CN106725392A (en) * | 2017-01-20 | 2017-05-31 | 深圳诺康医疗设备股份有限公司 | blood pressure detecting system and method |
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Address after: 518063 Guangdong city in Shenzhen Province, eight Nanshan District science and technology building 7E South Howell Patentee after: SHENZHEN NOVOCARE MEDICAL EQUIPMENT CO., LTD. Address before: 518063 Guangdong city in Shenzhen Province, eight Nanshan District science and technology building 7E South Howell Patentee before: SHENZHEN NK MEDICAL EQUIPMENT CO., LTD. |
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Address after: 518063 Guangdong city in Shenzhen Province, eight Nanshan District science and technology building 7E South Howell Patentee after: Shenzhen Nuokang Medical Technology Co., Ltd Address before: 518063 Guangdong city in Shenzhen Province, eight Nanshan District science and technology building 7E South Howell Patentee before: SHENZHEN NUOKANG MEDICAL EQUIPMENT Co.,Ltd. |
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