CN103892803B - Method and system and patient monitoring device for wireless medical monitoring - Google Patents

Abstract

A kind of method of paging in wlan network/searching wireless patient monitoring device, situation including the radio module determining one or more wireless monitoring device, described wireless monitoring device includes one of them of patient-wearable's device (PWD) and patient monitoring device (PMD), and it is suitable to carry out duplex communication with the one or more access points in WLAN and central monitoring station.The integral status of PWD/PMD can be multiple units states.After determining described situation, select specific PWD/PMD to receive being wirelessly transferred of signal, this signal is suitable to be not required state in this specific wireless supervising device current state in the case of first state of this device is changed to required state.Send indication signal to this specific wireless patient monitoring device, to send the first predetermined audible code can heard by the patient monitored by this specific PWD/PMD, thus activating the audible code function of this specific wireless supervising device, instruction patient contacts care station.

Description

Method and system and patient monitoring device for wireless medical monitoring

The present invention relates to the data communication protocol for Wireless Medical Telemetry system (WMTS) device management.In particular it relates to the Internet and the function management of agreement based on DECT.

Come from Digital Enhanced Cordless technology (DECT) the most fashionable whole world of Europe proposal, thus provide for many different types of application and the efficient access of business.System based on DECT just becomes more popular, particularly all the more so at Wireless Medical Telemetry system regions, and patient-wearable's device (PWD) therein such as can monitor the vital signs of patient and carry out wireless report to main frame or monitoring station.

Preserving the power of battery is a preferable target, and in the middle of all operations function of PWD, wireless transmission function utilizes most power.Therefore, such device can be designed to have sleep pattern, and wherein said device need not be fully powered up, and receives wake-up signal to become to activate completely.Ideally, it is desired higher than sleep pattern power low power state scope, thus the patient wearing PWD can promptly contact nursing staff or the device that misplaced can be readily positioned.

But, current remote measurement basic facilities cannot implement Premium Features in terms of dropping lower powered pattern." TeleVision " technology of prior art is provided solely for unidirectional " either simplex " ability (i.e. from device to central site), and described basic facilities lack AP agent functionality and/or wireless two-way ability and built-in control protocol or relevant application unit state machine model.

The present invention provides a kind of data communication protocol using special the Internet and agreement based on DECT to enable several medical treatment device management function.Especially, the present invention allows wireless medical devices under extremely low power rating by enabling after " standby " pattern paging, and/or sends audible indication based on its lasting first state in the case of not enabling.

The present invention can be to be controlled to indicate the access point (AP) in wireless network to send DECT by the Internet " to call " to wireless medical devices in a kind of mode run.After receiving this DECT calling, this device returns normal operating from standby mode or produces audible indication, and described audible indication is easy to clinician and is found this device in the case of this device " is misplaced " and/or loses.Clinical arrange busy, wireless medical devices misplace it occur frequently that, thus reduce clinician and give the ability of patient's Direct Nursing.

Additionally, another aspect of the present invention is so that clinician can point out the patient with flowing Medical Telemetry device to contact medical personnel's (directly contacting or by pressing the button on the device of patient's dress) immediately.

By using two-way, wireless data communication technology, the present invention can also be automatically brought into operation and increase scope and the scale (for the device quantity simultaneously managed) of the standby mode management application of flow device and mancarried device, so that clinician can remotely control these operations rather than the cost time runs between this device and care station or the most inefficent (for giving the direct medical treatment and nursing of patient) spends time and efforts device for searching or patient.

Fig. 1 is the legend of the system of the present invention according to current request protection.

Fig. 2 A is the legend of some unit's states of the situation that can be used for classification patient medical device of the present invention according to current request protection.

Fig. 2 B illustrates how described unit state changes during device passes through the representative transitions of its standby-recovery " life cycle ".

Fig. 3 is the detailed view of some assemblies including the patient-wearable's device/patient monitoring device according to the present invention.

It should be appreciated that combine that accompanying drawing provides is described below for illustrative purpose rather than carries out restricted.It will be recognized by those of ordinary skill in the art that the many modification that there is the present invention in the spirit and the scope of the appended claims of the present invention.

In order to get a real idea of the ability of the present invention of current request protection, several definition must be asserted, and is based especially on " paging/searching " and " standby " ability of WMTS-WLAN device." two-way " (" duplexing ") communication capacity of plan utilization technology based on WMTS-WLAN DECT makes these abilities be possibly realized.

" paging/searching " is such a ability, wherein can relate to remote measurement medical treatment device (if in the range of AP) so that it sends audible indication from this device, consequently facilitating determine the position of this device.Or, described paging/searching ability can be used for pointing out patient to perform nurse call station function.In either case, if the radio module of this device (RM) is in suitable pattern (i.e. in the range of a certain AP and be not " inactive "), this device could be made that response.Special WMTS-DECT level function may be used for this function.

" standby " pattern is such a ability, and wherein device can be placed in time operator scheme, in order to support " dynamically " nursing.Standby mode only just occurs after it has received the confirmation of request.If this device is not received by this confirmation, then this device retries, if retrying failure, it assumes that control unsuccessfully, and this device should send another then " MDS situation ADE device " message to determine whether the disappearance of response is because this device and has gone beyond the scope.When in standby mode, the power of some devices preserves feature and allows a kind of extremely low power dissipation pattern (sleep pattern), and wherein, device interface is effectively restricted to " be called " to revive by AP for the acceptance of the message on WLAN.If device can bear power demand, then should even at standby mode time nevertheless attempt to maintain association, in order to minimize the time needed for " recovering the waiting time "；For present purposes, it is only necessary to maintain alarm condition to update.

Some uses of standby mode are:

(1) when waiting distributes given bed for new patient, patient monitoring device (PMD) is typically placed at standby mode.The manual reversion of the operator scheme generally started from center is acceptable (if not requiring).

(2) when patient moves to/from assistant experiment room, animating means is typically placed in standby mode, this may cause off-limits situation, but it is so that provide automatic paging/searching and recovery capability even more important increasingly complex, especially all the more so when device is in power saving (sleep) pattern.Additionally, these devices " lose " (i.e. misplacing) routinely the most in stand-by mode, this makes to design complication further.

" automatically recovering " to describe a kind of device characteristic, it returns to operational mode from standby mode.Typically, this recovers, at device end, (this is contrary with the manual reversion of operational mode) occurs automatically, and typically starts from central station.But, this device can arrange a countdown timers when being placed in standby mode, thus when the timer expires, this device automatically recovers normal mode and sends MDS situation to PIC.

" automatically reconnecting " is such a feature, which depict when in the range of time and the device capability of " paging/searching " message can be responded when in the range of this device leaves scope and returns, automatically reconnecting is because when in the range of this device returns to, and this device periodically searches for the connection of PIC to receive from PIC and recovering to control instruction.Automatically reconnect and need not manually reconnect triggering when in the range of described device returns to.

Fig. 1 illustrates central monitoring station 105, and it such as can constitute care station in the emergency room of in the Center Medical unit in cardiac care unit, in sanatorium or accommodation structure or even hospital.Emergency room seems perhaps unlike corresponding to the environment of the present invention at the beginning, but actually people service according to priority reception in emergency room, and patient-wearable's device can be distributed when registration carrys out " electronic surveillance " patient profiles (the most unexpectedly deteriorating).

Patient monitoring device (PMD #1-4) 110 comprises wireless telemetry technique, thus in addition to one or more specific physiological reactions are measured, this wireless telemetry technique allows to send back to central monitoring station 105 via a kind of agreement, and described agreement is such as DECT, TDMA and/or WMTS.

It addition, patient-wearable's device (PWD #1-4) 115 comprises wireless telemetry technique equally so that report physiological data.But, PWD is dressed by patient, and such as can include the wrist strap for monitoring blood pressure and/or arm straps, portable heart watch-dog, temperature sensor etc..Such as, be attached to the bedside heart monitor of patient by patient from not dressed different for PWD；Such device will include PMD.

Or, described central monitoring station can only include the access point in WLAN, it follows the tracks of each node in its broadcasting area, and this AP itself can be hard-wired, optical fiber optics connection or be wirelessly connected to proxy server, master server or controller.

It should be appreciated that PMD 110 is proximate to patient bed slightly larger device, and generally portable.Such as, if doctor determines that patient needs MRI, then nursing staff can take patient to this region (this PMD has reserve battery to keep work when mobile) together with PMD 110 with wheelchair.

A part of Fig. 1 dotted line 120 around constitutes the RF scope of center monitoring website 105.PWD #2 and PMD #4 is outside the scope of central monitoring station 105.If central monitoring station 105 is AP, then these devices are likely by " handing-over (hand Off) " to another AP in this WLAN.

Each PMD and PWD has radio module (RM), its be suitable to be in several unit's state (sub-state) one of them in, the most standby, activate, lock, search for or inactive.Similarly, described PWD and/or PMD itself has an integral status, and this integral status includes multiple unit's state (as shown in Figure 2 B with discussed below as).According to first state that these are different classes of, described agreement based on WMTS-WLAN DECT determines suitable action.

Fig. 2 A illustrates that main sub-status list and their situation replace item.About standby, described device situation may be at operational mode or is in standby.Associate about (point in call) PIC, this device can be that PIC has associated, PIC goes association or be in PIC relevant during.About PIC connect, this device can be PIC connect, PIC disconnect or PIC connect in.About startup, this device can be know IP (preserve IP distribute address), do not know IP, start in or restart.About scope, in the range of this device may be at or be in outside scope.About access point, this device can be that AP has associated or AP goes association.

Fig. 2 B illustrates some different units states that can be used by the present invention.Such as, square frame 250 represents the original state of PWD device, wherein lists specific state and the situation of each state.At 255, standby condition is operable to, and PIC associates, and PIC connects, and starting state knows IP, within this device is in the range of transmission of this PIC.It addition, radio module (RM) state is to activate, timing is nonactivated.

At square frame 260, PWD enters standby mode, and RM status lock is set to sleep pattern.It should be noted that, because such as can have countdown timers, therefore timing is to activate, and therefore after predetermined period, PWD device is overtime and can be connected with PIC, thus activation center's main frame be may wish to this PWD of location by paging/searching ability.It should be noted that in square frame 260, PWD is that PIC does not associates, and PIC is not connected with, startup situation does not knows IP, and RM state is locked out.This PWD still within the scope of.

Such as depend on described PWD be within the scope of or scope outside, have many timeout case.In the range of being in due to the PWD in square frame 260, therefore after timing, it can be revived, and replies paging/searching, thus enables this device automatically to recover as shown in square frame 275.It should be noted that, by automatically recovering, RM situation is to activate now, and PIC has associated and connected, and AP associates.When the patient physiological information asked is sent back to AP, PIC and/or central host, PWD may return to original state.

But, if this PWD leaves scope, the different situations as shown in square frame 265 will be there are.Here, if described device is overtime, it can not receive/respond paging/searching.RM state shown in square frame 265 is nonactivated.Situation outside shown scope will allow device when in the range of and enter locking mode during still in timing, allow this device automatically to recover the most after a time out.

Square frame 270 illustrates situation about occurring when in the range of the PWD outside scope returns.In this embodiment, PWD is also not timed-out.After a time out, generation is automatically restarted.In this case, this device needs to manage power especially.For beneficially paging/searching ability, this PWD device can periodically enter locking or even state of activation；Otherwise it will be nonactivated and can not respond paging/searching request.Such device is referred to as orphan's device.

The conditions dictate PWD described in fig. 2b comprises the timeout mechanism in addition to DECT level paging/searching ability.If additionally, PIC optimizes finds orphan's device or the waiting time during standby mode recovers automatically, then may need automatic paging/searching mechanism.

Fig. 3 provides some details how being constructed about the wireless medical devices according to the present invention.This accompanying drawing being merely to illustrate property purpose, and do not limit the invention to shown device, and can have many equivalents or the different arrangement of the present invention.

Radio module (RM) 116 includes transmitting capacity, antenna (manually need not stretch out from this unit), transmitter and receiver.Physics monitoring module 118 is suitable to measure specific physiological reaction, such as pulse.Microprocessor (not shown) can control other function of this RM, health monitoring module 118 and this device.This device can include any one in the middle of speaker 113, vibrator 119 and lamp 120 or all, these can be used for particular notification's nurse call station.Can by patient depresses's nurse call station confirm 112 so that central monitoring station 105 know this patient already known he need to contact this central monitoring station or nurse as early as possible.

Described paging/finding method based on DECT level can determine the situation of device by poll AP 104 and 106 or central monitoring station 105.Typically, the method requires many AP clean culture or broadcast based on PIC.Assume to be look for a specific device, may be unaware which AP is currently further associated, and if this device be nonactivated, then given AP may be unaware that this device is whether in its range of transmission.When inactive, by solving given AP, the portability of described device may be unaware that a nonactivated device is moved in the sending zone of this AP.Must take into network loading effect, especially true in the case of using periodicity poll based on PIC when device time particularly in the range of returning to.

Implement the example of mode of the method be by unit state model, special AP " act on behalf of " function and wireless link " device calling " function integrates, thus single assembly Call-Control1 is so that the execution of this device operates below:

(1) change to required state, i.e. from standby recovery (if this device is in standby mode)；And/or

(2) significant audible code is indicated to patient, so that patient presses " nurse call station " button or contact nursing staff (if this device is not at standby mode but is associated with central monitor system 105)；And/or

(3) significant audible code is indicated, in order to it is positioned by clinical or biological engineering personnel.

Such as, in the explanation shown in Fig. 1, the patient " Smith " of coronary problems is had to wear PWD #1 and live in the home for the aged.PWD #1 is the most operable, and is reporting the heart beating change merited attention, but this heart beating change not yet constitutes emergency situations completely.Nursing staff knows that patient Smith should take nitroglycerine for every eight hours to stablize his heart beating.Central monitoring station can send paging first/searching message to PWD #1.An audible tone of this message activation, and during instructing, patient has been apprised of and should contact with care station immediately when he hears this tone.Alternatively or cumulatively, described terminal audible tone includes drone sound (and consciousness).Combine with this tone or replace this tone, lamp can be had to flash.

Or, replacing tone, PWD can broadcast the most pre-recorded message, and this message says " nurse call ".When patient's Smith nurse call, they can examine whether he takes medicine in the most predetermined time, and inquires his how are you feeling today.This PWD itself can have a switch, user press this switch and confirm to receive this tone/message, or this tone/message can not be sent back central site.If patient does not confirm after certain predetermined period of time or continuous print are attempted, then this PWD can be with the urgent audible tone of automatic Display, so that clinician can be quickly found patient Smith, and cannot be with care station communication because he is possibly.

In order to individually carry out two-way communication with central monitoring station, this PWD should have transmitting capacity, thus when patient presses ACK button or activates nurse call button, communicates between the AP specified and care station (such as central monitoring station).Thus, patient and the doctor of central monitoring station or nurse can the most quickly and easily communicate.Each PWD can use TDMA, CDMA, GSM, FMDA etc., in order to distinguishes patient in WMTS or in DECT frequency spectrum.

In a modification of above-mentioned example, the radio module of PWD #1 is in standby mode, because this PWD only association centre's monitoring station after the physiological measure of patient outside scope and/or the sometime cycle is in the past.In this example, PWD #1 did not had and central monitoring station communication in three and a half hours.In the case of this central monitoring station had been programmed in the past four hours and has not had any communication, send paging to PWD #1 to check its situation.Because patient Smith can walk about anywhere along hospital, all of AP can broadcast paging first/searching message, and it can be " waking up up " signal in the case, be followed by first give PWD message to allow patient calls's central monitoring station.

Certainly, if PWD #1 is outside the scope for the broadcast of patient, then this device may be still within scope outer/failed list in.In order to reduce the time that may not consider this device, this device can periodically report its situation.A kind of mode is to export according to intervalometer.Such as, this device can gap report be once at predetermined time intervals.Without returning response, this report can be repeated immediately, or repeats with shorter interval, until in the range of this device returns to.

Therefore, a series of method steps for the present invention may include that

A () determines the situation of the radio module (RM) of one or more wireless monitoring device, described wireless monitoring device includes one of them of patient-wearable's device (PWD) and patient monitoring device (PMD), it is suitable to carry out duplex communication with the one or more access points in WLAN and central monitoring station, and wherein the situation of RM includes in the middle of multiple units state；

B () selects specific wireless monitoring device to receive being wirelessly transferred of signal, this signal is suitable to, in the case of the current state of this specific wireless supervising device is not required state, first state of this device is changed into required state；And

C () sends indication signal to this specific wireless patient monitoring device, to send the predetermined audible code at least can heard by the patient monitored by this specific wireless supervising device, thus activate the audible code function of this specific wireless supervising device, wherein, audible code in step (c) is so that this particular patient supervising device sends specific tone, to patient, this tone shows that nurse call station function has been broadcasted, thus this patient contacts a member in nursing staff, or described audible code is so that this particular patient supervising device plays the message of pre-recorded/preprogramming to patient, this information request patient contacts a member in nursing staff.

One attendant advantages of the present invention is, described audible code includes paging/looking up function, thus the volume of the audible code play by specific wireless patient monitoring device be enough to the personnel allowing not know this location of wireless devices and can position this wireless device by listening to this audible code when pass by hospital, clinic, sanatorium, asylum, medical facilities etc..

In the case of without departing from the spirit of the present invention or the scope of the appended claims, the present invention can have different modification.Such as, although be agreement based on WMTS DECT for a kind of agreement of being wirelessly transferred, but any kind in the middle of CDMA, TDMA, GSM, FDMA etc. may be used to transmission.Medical monitoring device can be dressed by patient, implant patient or outside is placed on user's skin.The type of audible code, volume and the frequency broadcasted may be adapted to specifically need.Vision can be sent assist to replace or combining audible code；Such as, when paging/looking up function is performed, this device can glisten.Described AP and device can be at WIFI(such as 802.11) under communicate, and described AP and central monitoring station can pass through wire, optical fiber, Ethernet, broadband etc. and be chained up, and the most only enumerates several possible connection.

Claims (14)

1., for a method for paging in WLAN (WLAN)/searching wireless patient monitoring device, comprise the following steps:

nullA () determines the situation of the radio module (RM) (117) of one or more wireless patient monitoring device，Described wireless patient monitoring device includes patient-wearable's device (PWD) (115a，115b) with patient monitoring device (PMD) (110a，In 110b) one，This patient-wearable's device (PWD) (115a，115b) with patient monitoring device (PMD) (110a，110b) it is configured to and the one or more access points (104 in WLAN，106) and central monitoring station (105) carries out duplex communication，Wherein PWD/PMD (115a，115b/110a，Integral status 110b) includes one of multiple units state，The plurality of unit state includes at least one in mode of operation and holding state，Wherein，At holding state，PWD/PMD (115a，115b/110a，110b) office of acceptance to the message on WLAN is limited to reception and wakes up/find signal up，And the situation wherein determining radio module is by the one or more access point (104 of poll，106) one or more in and occur；

B () wirelessly sends and wakes up/find signal up to specific PWD/PMD (115a, 115b/110a, 110b), described wake up/find signal up and be suitable to, if described specific PWD/PMD (115a, 115b/110a, current unit state 110b) is not at mode of operation, then first state of described specific PWD/PMD (115a, 115b/110a, 110b) is changed to mode of operation；

C () wakes up/finds signal up, by this specific PWD/PMD (115a, 115b/110a when receiving, first state 110b) changes to mode of operation, and the sound code function activating this specific PWD/PMD (115a, 115b/110a, 110b) launches predetermined audible code；

D () is for PWD/PMD (115a, 115b/110a, 110b), if wireless patient monitoring device does not has polled during the time of predetermined quantity or is not received by waking up/find signal up, the most periodically by this specific PWD/PMD (115a, 115b/110a, 110b) integral status be broadcast to the one or more access point (104,106)；And

E () is in response to PWD/PMD (115a, 115b/110a, 110b) receive and wake up/find signal up and automatically by PWD/PMD (115a, 115b/110a, 110b) reconnect to the one or more access point (104,106), by this PWD/PMD (115a, 115b/110a, 110b) first state change to mode of operation.

The most the method for claim 1, wherein the audible code in step (c) causes this specific PWD/PMD (115a, b/110a, b) launches specific tone, and it provides and contacts the instruction of nurse for patient.

3. the method for claim 1, wherein, the audible code in step (c) causes this specific PWD/PMD (115a, 115b/110a, 110b) to patient's played pre-recorded/message of pre-programmed, this message request patient contacts a member in nursing staff.

4. the method for claim 1, wherein, audible code in step (c) includes paging/looking up function, it includes described specific PWD/PMD(115a, 115b/110a, another audible code 110b) play, the volume of another audible code wherein said be enough to allow the personnel not knowing this wireless patient monitoring setting position to position this wireless patient monitoring device by listening to this another audible code.

Determine the RM(117 of one or more wireless patient monitoring device the most in step (a) .) situation be by occurring via the one or more access point of unicast polls (104,106).

6. the method for claim 1, wherein, a PWD/PMD(115a, 115b/110a are determined in step (a)., RM(117 110b)) situation be by occurring via the one or more access point of broadcast polls (104,106) based on point in call (PIC).

The most the method for claim 1, wherein the one or more PWD/PMD(115a, 115b/110a, 110b) RM(117) use agreement based on Wireless Medical Telemetry system WLAN DECT.

8. method as claimed in claim 7, wherein, PWD/PMD(115a in step (a), 115b/110a, 110b) multiple unit state integral status farther include locked, search for, PIC associates, and PIC is not associated, and PIC connects, PIC is not connected with, access point (AP) associates, and AP is not associated, activates timing, inactive timing, and the specific PWD/PMD selected in step (a). do not respond in the case of the outer state of the scope specified.

9. method as claimed in claim 8, wherein, first state of the RM (117) of this specific PWD/PMD (115a, 115b/110a, 110b) is changed to state of activation in step (b).

10. method as claimed in claim 8, wherein, described unit state farther includes: knows IP address, know IP address, start and restart.

11. 1 kinds of systems for paging/searching wireless patient monitoring device, including:

One or more access points (104,106)；

One or more wireless patient monitoring devices, including patient-wearable's device (PWD) (115a, 115b) and in patient monitoring device (PMD) (110a, 110b) one, this patient-wearable's device (PWD) (115a, 115b) with patient monitoring device (PMD) (110a, 110b) it is configured to carry out duplex communication, described PWD/PMD(115a with one or more access points (104,106), 115b/110a, 110b) include radio module (RM) (117)；

Wherein, the integral status of PWD/PMD (115a, 115b/110a, 110b) includes that one of multiple units state, the plurality of unit state include at least one in mode of operation and holding state,

Wherein, at holding state, PWD/PMD (115a, 115b/110a, 110b) is limited to reception to the office of acceptance of message and wakes up/find signal up；

Wherein, PWD/PMD (115a, 115b/110a, 110b) is suitable to by the one or more situations determining RM in the one or more access point of poll (104,106)；

Wherein, the one or more access point (104,106) is suitable to wirelessly send and wakes up/find signal up to specific PWD/PMD (115a, 115b/110a, 110b), described wake up/find signal up and be suitable to, if described specific PWD/PMD (115a, 115b/110a, current unit state 110b) is not at mode of operation, then first state of described specific PWD/PMD (115a, 115b/110a, 110b) is changed to mode of operation；

Wherein, described specific PWD/PMD (115a, 115b/110a, 110b) be suitable to, wake up/find signal up when receiving, by this specific PWD/PMD (115a, 115b/110a, 110b) first state change to mode of operation, and activate this specific PWD/PMD (115a, 115b/110a, 110b) sound code function launch predetermined audible code；

nullDescribed specific PWD/PMD (115a，115b/110a，110b) be suitable to，If wireless patient monitoring device does not has polled during the time of predetermined quantity or is not received by waking up/find signal up，Periodically by this specific PWD/PMD (115a，115b/110a，Integral status 110b) is broadcast to the one or more access point (104,106)，And in response to PWD/PMD (115a，115b/110a，110b) receive and wake up/find signal up and automatically by PWD/PMD (115a，115b/110a，110b) reconnect to the one or more access point (104,106)，By this PWD/PMD (115a，115b/110a，First state 110b) changes to mode of operation.

12. systems as claimed in claim 11, wherein, by described specific PWD/PMD(115a, 115b/110a, 110b) the audible code that sends includes the tone that indicates nurse call function.

13. systems as claimed in claim 11, wherein, the one or more access point (104,106) is via PWD/PMD(115a described in broadcast polls based on point in call (PIC), 115b/110a, 110b) situation.

14. 1 kinds of wireless patient monitoring devices, it carries out duplex communication with one or more access points (104,106), including:

For monitoring the parts (118) of the specific physiological reaction of patient；

Radio module (RM) (117), it is suitable to communicate with the one or more access point (104,106)；

Audible code issue device (113)；

Wherein, the integral status of described wireless patient monitoring device includes one of multiple units state, the plurality of unit state includes at least one in mode of operation and holding state, and at holding state, wireless patient monitoring device is limited to reception to the office of acceptance of message and wakes up/find signal up；

Wherein, described wireless patient monitoring device farther includes:

RM situation determines unit, and it is suitable to by the one or more situations determining RM in the one or more access point of poll (104,106)；

Unit's state changes unit, and it is suitable to, and wakes up/find signal up when receiving, and changes first state of this wireless patient monitoring device to mode of operation, and activates this audible code issue device (113) and launch predetermined audible code；

Integral status radio unit, it is suitable to, if wireless patient monitoring device does not has polled during the time of predetermined quantity or is not received by waking up/find signal up, periodically the integral status of this wireless patient monitoring device is broadcast to the one or more access point (104,106)；

Wherein, wake up/find signal up in response to receiving and automatically this wireless patient monitoring device reconnected to the one or more access point (104,106), described unit state change unit is suitable to change to mode of operation first state of this wireless patient monitoring device.