Apparatus, method, and system for remote monitoring of need for assistance based on change in velocity

[0002] Co-owned, co-pending U.S. Ser. No. 09/666,732, filed Sep. 20, 2000, is incorporated by reference herein in its entirety.

[0003] The invention is an apparatus, method and system for providing remote monitoring of a person's need for assistance without necessarily monitoring physiological conditions at the person. More particularly, the invention monitors user spatial orientation, velocity and acceleration changes, and based on these changes, the invention determines if assistance may be required. The invention determines the location of the user and selectively communicates the location; orientation information obtained from the spatial orientation, velocity, and acceleration sensors; and the current alert status to a remote location.

[0004] There is an ever-growing number of people that engage in independent and/or active lifestyles but still may be susceptible to injury. Friends, family, loved ones, caretakers, caregivers, and other persons may not always be physically present to accompany or monitor the person. The friends, loved ones, caretakers, caregivers, and other persons may, however, want to be notified in case of any emergency situation involving the person susceptible to injury. One solution to this problem has been physiological monitoring. One example of physiological monitoring is the commonly owned application titled APPARATUS, METHOD AND SYSTEM FOR REMOTE MONITORING OF PHYSIOLOGICAL CONDITIONS, filed on Sep. 20, 2000 and having Ser. No. 09/666,732. In physiological monitoring, a person or user is connected to one or more physiological monitoring devices to monitor vital signs or other physiological information. Physiological monitoring has had numerous problems.

[0005] Typically, a physiological monitoring device senses physiological conditions of the user and immediately transmits these conditions to another location which remotely processes the information. Problems are present in the communication link from the device on a user to the central location. Some problems are related to the amount of physiological data that is sent. In order to properly monitor the vital signs or other physiological information of the user, frequent or continuous transmissions must be made. These transmissions may consume more bandwidth and more power than is desirable.

[0006] Another related problem concerning physiological monitoring devices involves the integrity of the information received over the communication link. Particularly where there is a large amount of information being transmitted in the process, there is the opportunity for this information to be corrupted. Where physiological information is corrupted in the transmission process, the goal of monitoring for emergency events and conditions is not fulfilled.

[0007] In addition, there is a security or privacy problem associated with transmission of physiological information. Users are not particularly amenable to having their physiological information capable of being monitored by third parties. Although these problems may be addressed through some extent through error checking and encryption, attempts at solving these problems may increase the bandwidth, or otherwise increase the overall complexity and cost of the device.

[0008] Another related problem is that these continuous transmissions of physiological data require additional power requirements that may make it infeasible for a battery operated device or else may result in a device that is large or cumbersome or requires frequent battery replacement.

[0009] In addition, the remote processing of this information may take considerable time. If there is a medical emergency, this must be known as soon as possible so that there is adequate time to respond to the emergency.

[0010] A further problem is that even when the physiological conditions of a user are monitored, the location of the user needs to also be known so that medical assistance can find the user if required.

[0011] Yet, another problem with physiological monitoring is that physiological monitoring requires a complex device such as with multiple sensors attached to the users body and other inherent constraints in current designs. These constraints make physiological monitoring inconvenient, uncomfortable and undesirable for users. In addition, these extra sensors may require design complexity that increases the overall size of the device. A larger, heavier device is also inconvenient for users to wear.

[0012] Another problem with physiological monitoring involves false alerts due to inaccurate monitoring. Physiological sensors may become displaced or detached from the body area they are monitoring. This results in the transmitted physiological readings not being reflective of the actual physiological condition of the user. Those monitoring the physiological conditions may only know the physiological readings and not realize that the sensors are simply not properly attached. This may result in false alerts.

[0013] These and other problems have made remote monitoring of people cumbersome, inconvenient, or sometimes unworkable.

[0014] It is therefore a primary objective, feature, or advantage of the present invention to provide an apparatus, method, and system which improve upon the state of the art.

[0015] It is another objective, feature, or advantage of the present invention to provide a system and method of user monitoring capable of alerting the desired response personnel.

[0016] Yet another objective, feature, or advantage of the present invention is to provide a monitoring device that may be comfortably worn.

[0017] It is a further objective, feature, or advantage of the present invention to provide a means of communicating alert information to emergency or health care professionals.

[0018] It is yet another objective, feature or advantage of the present invention to provide a monitoring device that is relatively simple in operation.

[0019] It is yet another objective, feature or advantage of the present invention to provide a remote monitoring device that requires only limited bandwidth.

[0020] It is yet another objective, feature or advantage of the present invention to provide a monitoring device that does not require any sensing devices, electrodes, tools, or equipment to be placed in direct contact with the user's skin.

[0021] It is yet another objective, feature, or advantage of the present invention to provide a monitoring device that is capable of onboard computations, monitoring, and decision making.

[0022] It is a further objective, feature, or advantage of the present device to provide an optional means of tracking the location of a person using the device, and communicate their location to medical care responders or other care providers.

[0023] It is yet another objective, feature, or advantage of the invention to optionally use the location-tracking device to provide data on the position and state, velocity, or acceleration of a person.

[0024] It is a further objective, feature, or advantage of the present device to provide an optional means of alerting nearby persons to the situation, and to attract the attention of rescue personnel upon their arrival.

[0025] It is a further objective, feature, or advantage of the present invention to provide information for updating notification information through a web-based interface.

[0026] It is a still further objective, feature, or advantage of the present invention to provide a system that may be cheaper, more durable, and more reliable than physiological monitoring.

[0027] It is a still further objective, feature, or advantage of the present invention to provide a method, system, and apparatus for remote user monitoring with reduced likelihood of false alerts.

[0028] It is a still further objective, feature, or advantage of the present invention to provide a means of transmitting information that need not be continuous and may be transmitted in a burst transfer.

[0029] These and other objectives, features, or advantages of the present invention will become apparent from the specification and claims.

[0030] The invention is a monitor unit that monitors a human body as a unit of mass including velocity, velocity changes, and other physical status and orientation information. The monitor unit is designed to be worn close to the body and may be worn on a person's clothing, such as on a belt, or placed in a pocket. The monitor unit determines whether there is a need for assistance based upon movement changes. These movement changes may be changes in velocity, changes in position, or acceleration.

[0031] The monitor unit is capable of communicating the need for assistance to a communications network, capable of notifying third parties of the need for assistance. The monitoring unit may also include a geographic location device so that location information may also be transmitted to a communications network so that a third party receives location information as well. The monitoring unit may also include an optional deactivation switch so that if there is no emergency, the person wearing the device can prevent a need for assistance alert from being sent. In addition, the sensitivity of the device may be set according to the needs of a particular person.

[0032] The invention also provides for a method of determining whether there is a need for assistance based on the movement changes sensed by the device.

[0033] The invention also provides for a system that includes a communication network and central control or directly to a selected person's telephone, pacer or other communication device. The communication network is capable of receiving transmitted signals from the monitor unit. The communication network may be a paging network, a cellular telephone network, a satellite network, a radio communications network, or other network. The communication network can then forward any need for assistance messages to a central control or directly to a selected person's telephone, pager, or other communication device. The central control can then process this information as needed and issue notification messages to users by telephone, pager, or electronic messaging.

[0034] FIG. 1 is a diagrammatic representation of an accelerometer having three axes such as may be used in an exemplary embodiment.

[0035] FIG. 2 is a block diagram of the monitor unit according to one embodiment.

[0036] FIG. 3 is a pictorial representation of the system of the present invention permitting third parties to receive alerts concerning monitored persons.

[0037] FIG. 4 is a flow diagram illustrating one embodiment of the notification process of the present invention.

[0038] FIG. 5 is a flow diagram illustrating one embodiment of the processing of acceleration information.

[0039] FIG. 6 is a flow diagram illustrating another embodiment of the processing of acceleration information.

[0040] FIG. 7 is a diagram showing an exemplary message from the monitor unit.

[0041] FIG. 8 is a diagram showing the flow of information from the monitor to those being notified of an alert.

[0042] FIG. 9 is a diagram of a user interface that permits a user to modify contact information for people who are notified.

[0043] Overview

[0044] For a better understanding of the invention, an exemplary embodiment will now be described in detail. Frequent reference will be taken to the drawings. Reference numerals and letters will be used in the drawings to indicate certain parts and locations in the drawings. The same reference numerals or letters will indicate the same parts or locations throughout the drawings unless otherwise indicated.

[0045] Apparatus of Exemplary Embodiment

[0046] FIG. 1 is a diagram showing an accelerometer 10 that may record readings in 3 axes over a range of g forces. In a three-axis accelerometer, as shown, measurements are made over the X dimension 12, the Y dimension 14, and the Z dimension 16. The present invention contemplates, that if need be, multiple one axis or two axis accelerometers may be used (the accelerometers oriented on different planes) such that acceleration may be measured with respect to all three axes. One example of a type of accelerometer that may be used is the IMEMS ADXL210, which is available from Analog Devices. The criteria for the device includes size, power consumption, and impact measurement range and accuracy. Accelerometers that are smaller in size, have reduced power consumption, and have increased impact measurement range and increased measurement accuracy are preferred. For example, an accelerometer may have an impact measurement range that is less than or equal to 10 g's, and may have an accuracy of 10 mg's or less.

[0047] FIG. 2 illustrates that accelerometer 10 is a part of a user monitor 18. The accelerometer 10 is electrically connected to a processor 20. The specific interface between processor 20 and accelerometer 10 is dependent upon the specific processor 20 and the specific accelerometer 10 used. The present invention contemplates that this interface may be through a standard RS-232 serial communication; proprietary interfaces; I²C, SPI or other bus interfaces. Similarly, digital outputs of the accelerometer 10 may be connected to digital inputs on the processor 20 and that digital inputs to the accelerometer, if any, may be connected to digital outputs on the processor 20.

[0048] The present invention also recognizes that sensors other than accelerometers may be used, that sense information that can be used to calculate impact. Other devices that sense acceleration or other velocity shift measurement devices may be used. Such alternate measurement devices may include a more accurate GPS system or other location determining system.

[0049] The processor 20 may be a standard RISC-133 processor, though many other intelligent devices are contemplated by this invention. The present invention is not limited to a particular type of processor. Preferably the processor used is small, lightweight, and has low power consumption. In addition to a processor, other intelligent control devices may be used. The present invention contemplates that a processor, microprocessor, microcontroller, digital signal processor, integrated circuit, or portion of an integrated circuit may also be used. The intelligence of the device may be implemented in hardware, software, or a combination thereof.

[0050] The processor 20 is also electrically connected to transmitter 22. Transmitter 22 is capable of transmitting information, such as alert messages that will be discussed later in detail, from the processor to a remote location. The transmitter 22 may be a transmitter such as used in pager. The transmitter 22 may be either a one-way pager or a two-way pager such as may be used with the SKYTEL network or pager network. The transmitter 22 may use any number of standard paging protocols such as the MOTOROLA REFLEX protocol. The present invention contemplates that the type of network used and the corresponding transmitter need not be a paging unit, but could be a cellular network using CDPD or other technology, a satellite network, or other type of wireless network such as may be known in the art. The type of transmitter 22 is selected based on considerations of low power requirements, safe close-proximity transmission, and adequate structure penetration. The messages sent over the communication channel can be small and simple binary strings as will be explained.

[0051] A deactivation means 24 is also shown in FIG. 2. Deactivation means 24 is electrically connected to processor 20. The deactivation means 24 may be a button or other switch that serves as a user input to the processor. The purpose of deactivation means 24 is to provide the user of the device 18 with a method of preventing an alert from occurring. The purpose of the deactivation means 24 will become even clearer in later discussion of the invention.

[0052] FIG. 2 also shows the optional use of GPS unit 26, display 28, and alarm 30. These components may all be connected to processor 20 in the manner suggested by the particular GPS unit 26, display 28, and alarm 30 used.

[0053] The GPS unit 26 may communicate with processor 20 through proprietary messaging associated with a particular GPS unit 26 over a proprietary interface associated with the particular GPS unit 26. Alternatively, the GPS unit 26 can communicate with the processor 20 through an RS-232 interface (for signaling purposes, but voltage level may be 5V or other standard) using the standard NMEA protocol such as is well known in the art. The GPS unit 26 may be an embedded chip such as is available from Garmin and other manufacturers.

[0054] A display 28 is another option of the monitoring device 18. The device provides its wearer with a visual indication of whether an alert has successfully been sent and received or whether or not monitor unit 18 has successfully been deactivated. The present invention contemplates that other information may be displayed on display 28 as may be convenient for the user of device 18.

[0055] The optional alarm 30 is also electrically connected to processor 20. The alarm may be a loud audible alarm so to draw the attention of others when activated. The present invention contemplates that the alarm may also be visual in nature, such as a flashing light, or other indicator of an emergency situation.

[0056] If CPDP, cellular, or other voice communication networks are used, the present invention contemplates that the device may also include a voice construction component. The voice construction component may be implemented through software in the processor, or may be implemented with an integrated circuit, or portion of an integrated circuit.

[0057] The monitor unit may also include an optional sensitivity settings that may be selected through dipswitches or may be programmed. Different users will require different sensitivity settings. For example, a 90 year old man may require greater sensitivity to changes in velocity or acceleration than a 13 year old boy. Age, size, and condition as well as other factors may be taken into account when determining the proper setting for sensitivity.

[0058] As the invention monitors the status of the body as a unit of mass, preferably the monitor unit 18 is placed at or close to the center of mass for an individual. Preferably, the monitor unit 18 is snug with a location such as in the trunk or torso and not an arm or leg.

[0059] System of an Exemplary Embodiment

[0060] FIG. 3 is a diagrammatic representation of the system of the present invention. In FIG. 3, users 31 each carry the monitor unit 10. User 31A carries the monitor unit 10 on a strap 32 capable of being worn around the neck. User 31B carries the monitor unit 10 on a belt 36. User 31C carries the monitor unit 10 in pocket 34. The monitor unit 10 is in communication with a distributed network such as SKYTEL 38. The distributed network SKYTEL 38 is in communication with a central control 40. This communication between SKYTEL 38 and central control 40 may be through an Internet connection such as is known in the art. For example, electronic messages may be sent from a pager over SKYTEL to an Internet email address.

[0061] Central control 40 is also connected to the public telephone system 42. Central control 40 can then forward messages to those who are to be notified 44 through the public telephone system 42. The present invention permits central control 40 to notify the persons to be notified 44 through other means such as through electronic email or through paging.

[0062] Exemplary Method of the Present Invention

[0063] FIG. 4 illustrates the logical flow of one embodiment of the method of the invention. In step 46, an accelerometer output an acceleration reading or an acceleration or velocity change reading is otherwise calculated. The accelerometer reading is then compared to a threshold Q in step 48. Q is a threshold selected for the particular user of the device. The threshold is selected on the basis of physical size of the person as well as the condition of the user. The greater the Q the higher the force that the person wearing the device is expected to be able to withstand without harm. If the measured acceleration is not greater than Q, then the accelerometer is read again in step 46. If the acceleration is greater than the Q threshold, then in step 50, the user is notified. This notification can be accomplished through the use of the display 28 or the alarm 30, or other means such as would be convenient. Once the user is notified in step 50, a countdown is initiated in step 52. The countdown relates to a set period of time during which the user may deactivate the alarm. If the countdown is completed without deactivation, then an alert is transmitted. As step 54 shows, a determination is made as to whether the alarm is deactivated. If the user does deactivate the alarm such as through pressing of a button or switch, then there is no alert transmitted and the acceleration is read again in step 46. If there is no deactivation, then in step 56 a determination is made as to whether the countdown is complete. The time of the countdown is selected based upon the particular user of the device and the amount of time reasonably necessary to ensure that if the user is not injured, the user will have time to press a button or otherwise deactivate the device prior to any alert being transmitted. This amount of time is selected based upon the physical condition of the user, the type of deactivation means used, how the monitor unit 18 is typically worn, and other considerations related to the amount of time the user may require for deactivation. If the countdown is not complete, then in step 56, the processor again determines whether the alert has been deactivated in step 54. If the countdown is complete in step 56, then in step 58 an alert is transmitted.

[0064] FIG. 5 illustrates another embodiment of the present invention. This embodiment permits an alert to be transmitted only when an acceleration reading has been at a particular level, defined as between the threshold Q and the threshold R, only once during a particular amount of time, X. This embodiment is useful in that it can be used to eliminate false triggering that may occur when a person wearing a monitor unit 10 travels in a car or other vehicle, thus experiences acceleration unrelated to the physical condition of the person. In addition, this embodiment is useful in that if there is additional acceleration after time X, it is apparent that the person is not in medical danger and no alert need be transmitted. For example, a person could fall and then get up on their own, thus there would be no need for an alert.

[0065] In FIG. 5, step 60, the accelerometer is read. Then in step 62 a determination is made as to whether the acceleration is greater than the threshold Q and the acceleration is lower than a threshold R. If the acceleration is not greater than the threshold Q and the acceleration is less than a threshold R then in step 64 a timer is started for X seconds. In step 66, another determination is made as to whether the acceleration is greater than the threshold Q and the acceleration is lower than a threshold R. If so, then no alert is transmitted, and the accelerometer is read again in step 60. If not, then in step 68 a determination is made as to whether the X seconds have elapsed in step 68. If not, then the process returns to step 66 and another determination is made as to whether the acceleration is greater than the threshold Q and the acceleration is lower than a threshold R. If X seconds have elapsed, then in step 70, an alert is transmitted.

[0066] FIG. 6 illustrates another embodiment of the present invention. FIG. 6 is similar to FIG. 5, except for instead of the acceleration being compared to the range between Q and R, the acceleration is being compared to the range between R and T. In addition, instead of the timer being set for X seconds as in FIG. 5, the timer is set for Y seconds.

[0067] It should be apparent to one skilled in the art that multiple embodiments may be combined and used together. For example, if the acceleration is over a first value, then an alert is transmitted (after opportunity for deactivation). This setting would cover those instances of great acceleration where it is clear that a person may be endangered from the level of the acceleration. In addition, the acceleration could be compared to a second range. When the acceleration is in this range only once in X amount of time, the person may be endangered. In addition, the acceleration could be compared to a third range. When the acceleration is in this third range only once in Y amount of time, the person may be endangered.

[0068] It should be apparent that this method of comparing accelerometer thresholds and timing the occurrences of accelerometer readings that are greater than or less than these thresholds permits alerts to be transmitted that relate to the amount of force that the person wearing the accelerometer is experiencing. The amount of force is related to the presence or absence of an alert condition.

[0069] The present invention also contemplates more complex methods of operation concerning the transformation of sensed accelerometer readings into indications of the need for assistance.

[0070] The present invention contemplates that the acceleration readings may be sampled at any number of rates. However, the present invention also recognizes that by reducing the number of accelerometer readings required, the power consumption of the monitor unit 18 is reduced, thus extending battery life. The present invention also recognizes that the accelerometer may sample and communicate those samples to the processor faster than is required to monitor a person. The frequency of sampling is also related to the velocity at which the person is moving. The higher the velocity, the greater the need for more frequent sampling so as to ensure more accurate calculations of acceleration. The present invention contemplates that for many applications, sampling need not be greater in frequency than 5 times per second. However, higher sampling rates may be used.

[0071] FIG. 7 shows a message 84 having a user ID 86, an accelerometer reading 88, a parameter 90, and a latitude/longitude 92. The user ID 86 may be a 12-digit code. The accelerometer reading 88 may be a five significant digit number representing an accelerometer reading between 0 and 10 g's and the direction of acceleration. For example, one accelerometer reading may be 2.61 g. The parameter 90 may also be a four significant digit number between 0 and 10 g's representing the threshold that has been exceeded. For example, one threshold may be 2.00 g. When the acceleration exceeds the parameter, both the parameter and the threshold may be sent. The parameter may be necessary to communicate which type of event detection was used when a device supports multiple methods of detection. The latitude/longitude 92 provides a location, such as from a GPS. The latitude and longitude provide the hours, minutes, and seconds associated with the current (or last known) location of the monitor 18. The present invention is in no way limited by the particular message being sent as the present invention contemplates numerous variations on the message to indicate that an alert should be issued.

[0072] The user can assign the party to be notified. The user can select to notify a loved one instead of emergency officials or a call center. The loved one receives a phone call and hears a message relaying the location, nearest major intersection, and amount of parameter violation in lay terms. Suitable action can then be taken.

[0073] FIG. 9 is a representation of a web based user interface of the present invention. In FIG. 9, a user is provided the ability to select the people who are to be notified in case of an emergency. Through use of web based interface, user may add, change, or delete the name of the person to be notified in case of there being a need for assistance. In addition, a user can modify the information associated with each name, including the telephone number, the e-mail address, and the pager number associated with each person. In addition, the user can select that method of contact for that person, including the selection of multiple methods. Thus, for example, a person may be contacted via telephone, e-mail, and by pager.

[0074] FIG. 8 further illustrates the information flow in one embodiment of the present invention. In FIG. 8 certain information is transmitted from the monitor unit 18. This information may include a user ID, an accelerometer reading, a parameter that has been exceeded, and a latitude/longitude. This information is sent or forwarded to a central control from the SKYTEL network, or other paging system. For example, the information could be electronically mailed or otherwise sent to the central control such as is well known in the art. The information received from the monitor unit is used for different purposes. For example, the user ID is used to provide a lookup function 94. This lookup may be in a database, such as a relational database. Other information that may be associated with the user ID include the user's name, the identity of those who are to be notified, and telephone numbers and email addresses of those who are to be notified. The present invention contemplates that other information may also be associated with the user ID, such as information related to the health of the user.

[0075] The accelerometer reading and the threshold parameter information is used by an analysis function 96 of the present invention. The analysis function 96 can be used to provide additional analysis of the accelerometer information. The analysis function 96 can take into account other information as well, including the condition of the user as well as the location of the user, past injuries, past alerts, and other information such as may be useful in predicting more information concerning the meaning of the acceleration or acceleration change experienced by the user.

[0076] The latitude and longitude or other location information may be used by a geographical information systems (GIS) function 98 of the present invention. The GIS lookup function 98 can correlate a precise GPS location with a particular street address, nearest intersection, or other location information that is more descriptive to a person.

[0077] The present invention permits a person to be notified to be called. The present invention also contemplates that the person to be notified may be otherwise contacted such as by paging or through electronic mail or other electronic messaging. When a person is to be called, a dialer function 100 may be used to dial the telephone number associated with each person who is to be notified. A voice construction component 102 may be used to translate the information concerning the user's identity, location, and information concerning the problem into voice information communicated within the phone message 104. The voice construction component may be any number of text to voice applications used in telephony and other applications and such as are known in the art.

[0078] The present invention contemplates various other configurations and modes of operation. For example, monitor unit 18 of FIG. 2 may be combined with or otherwise used in conjunction with a device for physiological monitoring such as disclosed and apparatus, method and system for remote monitoring of physiological conditions, U.S. application Ser. No. 09/666,732, incorporated by reference herein. In this and other combinations contemplated by the present invention, transduced medical conditions such as blood pressure, heart rate, temperature, and other conditions would be monitored, in addition to the acceleration, change in velocity, or rather physical parameter related to the force.

[0079] In order to provide additional description of the present invention, step-by-step examples are now given for particular configurations, communications, and modes of operation of the present invention. It is to be understood, that these examples are in no way limiting. The present invention contemplates various other configurations, and modes of operation.

[0080] Monitoring of a Person Prone to Injury Upon Falling

[0081] For purposes of this example, a person is at risk of injury during a fall due to osteoporosis or similar disease. They wish to notify their loved ones, care providers or emergency officials in case of an accident in case they are incapacitated. The user, however, also maintains a healthy and active lifestyle, and often engages in early morning walks, golf, and other activities where they may alone for a length of time. While not at grave risk for medical problems, it is possible that the user becomes unable to move towards assistance and may be in areas where others would be unaware of their difficulty.

[0082] Rather than requiring invasive or restrictive monitoring devices that the user would rapidly tire of wearing, this unit would be simply attached to a belt, waistband, or other clothing item normally worn. This encourages the user to continue wearing the device and to include it as part of their daily lifestyle and regimen. This is important for the low-risk user that is yet capable of sustaining a disabling injury while away from areas frequented by other people and potential caregivers.

[0083] On board criteria is set to different parameters depending on the risk level of the user. In this case, a gentle fall that might leave a bruise on a more robust bone structure could result in a broken hip or leg; therefore the unit is programmed by the user to send an alert after a relatively low impact or change in velocity (acceleration). Velocity changes and settings can be based upon the age and height of the user, where on the body the unit is located, and the condition of the user. For example, a person may be at risk when exceeding a 2.00 g force.

[0084] Upon event occurrence, in this case, a fall of 2.61 g, the first notification is local to the user. This beep and countdown feature allows the users to deactivate the device with a button-push if they have fallen, dropped the device independently of their person, or otherwise activated the monitoring unit. If the device is not deactivated within a short time, a signal is generated as shown in FIG. 7.

[0085] The information sent includes the threshold parameter of 2.00 g. This indicates which threshold was exceeded. Based on the accelerometer reading and the threshold that was exceeded, further information concerning the event triggering the alert may be determined, or the event may be further categorized. For example, the event may be categorized as “a serious fall.” In addition the location information corresponding to a latitude of 27° 43′ 09″ and a longitude of 85° 32′ 09″ seconds correlates to a specific street address and intersection. It is not necessary to transmit the entire location information such as east, west, north, south, where it is known that a person's activity will be limited in geographical scope.

[0086] Based upon the received information, a loved one or an emergency response unit may contacted. For example, a family member may be notified by telephone of who may have sustained an injury, where the person is, and some information concerning the severity of the injury based upon the force involved.

[0087] An apparatus, method, and system for remote monitoring of need for assistance based on change in velocity has been disclosed. It should be apparent to one skilled in the art that the present invention contemplates numerous variations in the type of communication system used, the type of sensor used, the message transmitted from the monitor unit, the message received by a person to be notified, the amount of analysis performed on the information received, the type and number of thresholds used, and other variations such as a particular use or environment may require or suggest. In addition, it should be apparent to one skilled in the art that the present invention may be combined with physiological monitoring devices.