PHYSIOLOGIC SIGNS FEEDBACK SYSTEM

Abstract: A non-invasive physiological signs monitoring device (10) includes a garment with electrocardiogram electrodes (26) and various plethysmographic sensors (20-25) sewn, embroidered, embedded, or otherwise attached to the garment with an adhesive. The garment is in the form of a shirt. When the garment is fitted over the torso of the patient (15) to be monitored, the electrodes and sensors generate signals in response to the physiological signs of the patient. The signals are transmitted to a recording/alarm device (40) where they are monitored for adverse conditions and logged. When an adverse condition or other preprogrammed condition occurs, a message is communicated to the patient by either an audio message or a display. The recording/alarm unit is also connectable to a remote receiving unit (50) for monitoring by a health care professional or other machine.

Description: PHYSIOLOGIC SIGNS FEEDBACK SYSTEM BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non- invasive physiologic monitoring system which includes a garment incorporating an array of sensors and communications for transmitting monitored physiological signals to a recording/alarming unit. 2. Description of the Related Art The administration of health care has been shifting from traditional hospital -based care to home-based self care due to an increase in medical literacy and the complex medical technology that is being introduced to the home and skilled nursing facility environments. This trend requires the at-home utilization of devices for monitoring physiologic signs of a patient as an objective measure of health- status. Furthermore, such at-home devices must provide the same results as would be obtained in a hospital by nurses and other professional health care providers. Non- invasive monitors are preferred for use outside of the hospital because of their lack of risk of negative effects associated with invasive sensors that must be placed within the body, such as intravascular catheters. Systems for measuring a patient's "vital signs" have been described by ethers. For example, US Patent 4,981,139 discloses a vital signs monitoring and communication system. This system, however is used for monitoring a patient under anesthesia. Furthermore, it uses invasive sensors, such as an escphagea stethoscope, Αat are cabled o a nearby receiver Messages from the receiver are then transmitted by an infrared link to the health care provider The svscera messages merely identify which of the monitored Dhysiologic signs, such for example is Aeart ' 01 'temperature' , is m an alarm condition when such an alarm condition occurs. Other prior art systems include monitoring devices that respond to short term events, such as breathing monitors which monitor for apneas and brief episodes of tachycardia Therefore, there still exists a need for a non- invasive physiologic signs monitor tnat can be used m a home setting so as to allow patients who would otherwise be required to stay at a hospital to live at home while maintaining the monitoring necessary for their particular health conditions without sacrificing the level of reliability and scrutiny that they would receive m the hospital . SUMMARY OF THE INVENTION The non- invasive monitor according to the present invention comprises an easily worn garment incorporating an array of sensors and wireless communications and that transmits data to a nearby recording/alarm unit . To provide an effective non- invasive monitoring system, the garment of the present invention includes a sensor array targeted to the information to be sought. The sensor array and associated circuitry on the garment are easily applied and are transparent to the user such that the garment, sensors, and associated circuitry do not restrict the personal activities of the patient being monitored The recording/alarm unit, which receives information from the sensor array, provides easily understood indications that the equipment is operating properly, includes an alarm for adverse or preprogrammed events, and delivers status reports to the monitored patient and/or to the health care provider in plainspoken text messages . The status reports may be delivered periodically and/or upon request . The unit recording/alarm unit may also communicate with a remote station supervised by physicians or other health care providers. The unit additionally also includes a database for the monitored information and which may be used to record information received from visiting health care providers so as to facilitate the billing of services, preparation of regulatory reports, and assessment of quality of care. The garment incorporates inductive plethysmographic and electrocardiographic sensors with associated amplifiers and communications modules. An oscillator-demodulator unit for the inductive plethysmographic sensors within the garment has multiplex capabilities or may be implemented as separate modules tuned to different frequencies for eliminating cross-talk between the different sensors . The electrodes for the electrocardiographic sensors preferably comprise patches of graphite fiber conductive material that are sewn to the garment or otherwise fixed within the garment with an adhesive material or the like. The garment and sensors, which are designated herein as a non-invasive monitoring shirt (NIMshirt), transmits data from the sensor and associated electronics to the recording/alarm unit via a wireless pathway. The recording/alarm unit is preferably relatively near the patient being monitored, such for example as within a 300 foot radius around the patient being monitored. The NIMshirt transmits data at a rate ranging from approximately 25-200 points/second. Optionally, a one minute trend numerical value reduced from data processed waveforms is transmitted every five to ten minutes in which case the NIMshirt may transmit data at the rate ranging from approximately 25-200 points/second only when an adverse or preprogrammed event occurs to thereby conserve the batteries powering the electronics on the NIMshirt. The recording/alarm unit responds to the transmitted data from the NIMshirt with plainspoken statements through an audio system, under the control of a microprocessor. The plainspoken statements include information and recommendations for appropriate action directed to the patient being monitored and/or to his or her health provider. Multiple sensor monitors provide a great deal of interrelated, relevant information but may also provide redundant and irrelevant information. Therefore, the microprocessor of the invention is programmed with verbal phrases based upon on-off logic and/or expert systems that execute decisions based on the significance of each portion of data collected. The recording/alarm unit of the the present invention monitors the sensor signals for short-term adverse events and also delivers plainspoken statements based on analysis of trends collected over several minutes or hours of data. The recording/alarm unit may also transmit this information to an attending physician or health care provider for review and modifications of these statements at a central site; such transmission may be via the internet, cable, or telephone connections, 01 by way of a wireless link. The data from the sensors may be logged m a database for tracking the data and sensed conditions of patients and for comparison to other patients. The results of the tracking and comparison may result m changes m the diagnostic algorithms and action recommendations The system may receive demographic, historical, physical diagnostic information, and responses to treatments from visiting healtn care providers through a PC, notebook, or handheld computer The system may also be used to monitor medication compliance. Although the inventive system is primarily intended for use at home and m skilled nursing facilities, the current trend toward reducing staff m hospitals and other sites for the delivery of health care makes this system useful m those facilities as well. Finally, the system of the present invention may be employed for monitoring populations exposed to hazardous materials Table 3 shows a comparison of functional attributes of the sensors of the inventive NIMshirt to conventional technology. Other objects and features of the present invention will become apparent from the following detailed description considered m conjunction with the accompanying drawings. It is to be understood, however, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention, for which reference should be made to the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS In the drawings, wherein like reference characters denote similar elements throughout the several views : Fig. 1 is a front view, partly in section, of a NIMshirt constructed in accordance with to the present invention; Fig. 2 is a rear view, partly in section, of the NIMshirt of Fig. 1; and Fig. 3 is a block diagram of the non- invasive monitoring system of the present invention. DETAILED DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENTS Referring to Figs. 1 and 2, a preferred embodiment of the inventive non- invasive physiologic monitoring shirt (NIMshirt) 10 comprises electrically conductive plethysmographic sensors 20- 25 which are embroidered, sewn, embedded, woven, printed onto or otherwise affixed to or carried on a turtle-neck, long sleeved garment 15 that is worn over and about the torso of a patient (not shown) to be monitored. The NIMshirt 10 further includes electrocardiographic electrode sensors 26 that are sewn, embedded, or fixed with adhesive or the like to the inside of the rear face of the garment 15. The garment 15 is fastened snugly onto the body using fastening devices 16 such, for example, as velcro strips or ties. Each of the sensors 20-26 are connected to a microcontroller unit 30 that is attached to or carried on the garment 15. Microcontroller 30 comprises an oscillator-demodulator unit for the inductive plethysmographic sensors 20-25 and either has multiplex capabilities or takes the form of a similarity of separate oscillator modules tuned to respectively different frequencies for eliminating cross-talk between the various sensors 20-25 The microcontroller unit 30 is shown attached to a side of the garment is at the waist of the patient to be monitored, it may, however, alternately be attached or carried m any comfortable position or location on or about the body of the patient. As seen m Fig 3 , the microcontroller collects the monitored signals from the sensors 20-26 and transmits them via a wireless communication link 35 to a remote recording/alarm unit 40 which includes a processor for determining alarm conditions and providing datalogging functions The recording/alarm unit 40 incorporates an output device 45 such, for example, as a sound system, for providing alarms and action recommendations to the patient and/or healthcare provider m a preferably nearby area. The sound system m a preferred form provides these alarms and action recommendations as plainspoken audible statements Instead of or m addition to a sound system that reproduces audible messages, the output device 45 may be a display unit such as a monitor screen that displays the messages as contrasted with reproducing them audibly. This alternative may for example be used when the patient to be monitored is deaf or hard of hearing, or where the message contains a great deal of information which may be difficult to comprehend or appreciate when merely listening to an audible message. Such a modification also requires an additional signal to be directed to the patient being monitored when a new message is present, since the patient may not be within a line of sight of the recording/alarm unit 40 For this purpose, microcontroller 30 may include or activate a signalling device 46, such as a lllummitable lamp for informing the patient being monitored that there is a new message at the recording/alarm unit 40 Since microcontroller 30 is mounted on the NIMshirt 10, the signalling device may also when activated effect a vibration of the microcontroller 30 which will be felt by the patient being monitored The signalling device 46 may also be located at tne recording/alarm device 40 m some embodiments, as roi example where the signalling device 46 produces a sound or illuminates a lamp. The recording/alarm unit 40 may also be connected or linked to a receiving unit 50 located at a separate or remote site that is attended by health care providers for transmitting the data received from the NIMshirt 10, and associated alarms and/or messages, to receiving unit 50 so that the health care providers at the remote site may view and analyze the data The transmission to the remote site may be made via a modem, internet connection, satellite hookup, cable, or any other communication system or arrangement. The connection between recording/alarm unit 40 and receiving unit 50 may also allow health care providers at the remote site to return information to the unit 40. For example, the health care providers may wish to provide specific instructions to the patient being monitored In addition, the recording/alarm unit 40 may log the data received from the NIMshirt 10 to a database for tracking the condition of the patient and for comparison to other patients This enables continued modification and refinement of the diagnostic algorithm m the recording/alarm unit 40 and action recommendations With continued reference to Figs. 1 and 2, the structure and operative functionality of the individual sensors 20-26 will now be explained m further detail A neck inductive plethysmographic sensor 24 is sewn, embroidered, or embedded, for example, to the turtleneck area of the garment 15. Sensor 24 monitors jugular venous pulse, carotid arterial pulse, mtrapleural pressure swings related to respiration, contraction of neck muscles, and swallowing deflections Estimations of the central venous pressure from the data collected by sensor 24 compare well to values simultaneous recorded using mtravascular catheters. Since the jugular venous pulse depicts an 'a' wave related to arterial contraction, which is a substitute for the 'P' wave of the electrocaidiogram, data from sensor 24 may aid m differentiating arrythmias and supraventπcular tachycardia with aberrant ventricular conduction from ventricular tachycardia. The recording of the arterial pulse m conjunction with an electrocardiograph allows computation of the systolic time intervals which may be used for estimating the mechanical function of the left ventricle. Sensor 24 may also record swallowing deflections as sharp, transient waveforms superimposed upon slower respiratory deflections and vascular pulses An abdominal plethysmographic sensor 20 and a rib cage plethysmographic sensor 21 are sewn, embroidered, or embedded, for example, m the abdominal and rib cage portions of the garment 15 for monitoring the expansion and contraction of the abdomen and rib cage, respectively. The sensors 20 and 21, used together, are referred to as a respiratory inductive plethysmograph and are employed for recording breathing patterns . A thoracic inductive plethysmograph sensor 22 is sewn, embroidered, or embedded, for example, into the garment 15 around the xiphoid process region. Sensor 22 may be formed of one or more plethysmographic coil-type sensors and operatively monitors the beat by beat ventricular volume during breath holding and during slow breathing. Analysis of the resulting waveforms by the microcontroller recording/alarm unit 40 enables computation of changes in cardiac output and stroke volume and of parameters related to systolic and diastolic functions. Analysis of a derivative of the ventricular waveforms yields parameters analogous to Echo-Doppler measurements of the mitral valve. The deceleration time of the mitral flow velocity parameter can provide an estimate of pulmonary capillary wedge pressure in patients with compromised left ventricular function. Longer deceleration times are consistent with normal and shorter times with elevated pulmonary capillary wedge pressures . Two hemithoracic inductive plethysmographic sensors 23 are sewn, embroidered, or embedded, for example, into the garment 15 on the right and left sides of the upper thorax. These sensors 23 enable measurement of inequalities in regional expansion with breathing and paradoxical motion between the two hemithoraces . Such inequalities suggest pleural effusion, diaphragmatic hemiparesis, 01 pneumothorax and may aid m diagnosis of certain clinical circumstances. Limb inductive plethysmographic sensors 25 are sewn, embroidered, or embedded, for example, at the elbow and wrist areas of the garment 15. These sensors 25 record vascular pulses over the vessels of the limb or extremity about which it is placed. The sensors 25 may be used to record peripheral blood flow using standard plethysmographic occlusion techniques, pulse transit time by using a pair of separated sensors 25 on the extremity, or pulse transit time from arterial pulse m the neck to the extremity. The sensors 25 may also provide wideband external pulse recording of systematic blood pressure during cuff deflation. The preferred embodiment of the NIMshirt 10 further includes electrocardiogram (ECG) electrode sensors 26 (Fig. 2) . The ECG electrode sensors 26 may each by way of example comprise a large patch of graphite electrically conductive fiber material affixed to the inside of the back or rear wall or panel of the garment 15 with a flexible adhesive material. The ECG electrode sensors 26 may alternatively comprise, by way of additional example, a mixture of electrically conductive graphite and silicone gel that is painted onto the inside wall of the garment 15. The sensors 26 contact the skin directly without the need for electrically conductive gel between the electrodes and the surface of the skin. Although the ECG electrode sensors 26 are shown m Fig. 2 as mounted on the upper portion of the rear panel of the garment 15, they may alternately be mounted at any location about the garment at which an ECG signal may be detected on the patient's body. The combination of RR intervals of the ECG measurements from sensors 26 and the tidal breath waveform from the respiratory inductive plethysmographic sensors 20, 21 as described above may be used to determine respiratory sinus arrhythmia which is a measure of autonomic nervous system function. High values of this measure signify predominant parasympathetic nervous system activity and low predominant sympathetic nervous system activity. A body position sensor 27 may also be sewn, embroidered, or embedded, for example, in the garment 15 to indicate the patient's posture. Body position sensor 27 may comprise one or more off-the- shelf accelerometers . Finally, a pulse oximeter sensor 28 (Fig. 2) may also be used in conjunction with the NIMshirt 10. The pulse oximeter sensor 28 is generally placed at a distal fingertip of the patient or subject to measure arterial oxygen saturation and body movements. Although the pulse oximeter 28 need not be carried on or as a direct component of the NIMshirt 10, detected information from oximeter 28 may be treated in a manner similar to data from sensors 20-26 by microcontroller 30 and recording/alarm unit 40. True values of arterial oxygen saturation are thereby distinguishable from values affected by motion artifacts using appropriate software algorithms . The recording/alarm unit 40 operatively provides, by way of illustrative example, the following functionality: messages assuring proper functioning of the monitor, such for example, as "system operating properly" ; messages concerning actions to be taken m the event of malfunction, such, for example, as "system not operating properly, make sure the disk is inserted properly", or "system malfunction, contact the equipment manufacturer" (the name and address may also be supplied) , - messaqes concerning correct or incorrect placement and detachment of sensors 20-26 and their lead wires, messages relating to vital signs information, significance, and actions to be taken by the patient m response thereto; periodic messages concerning the stability of vital signs at preselected intervals or upon request of the patient or health care provider for assurance purposes, such for example, as "it is now 10AM and there has been no change m the vital signs " ; messages relating to specialized physiologic signs information, significance, and recommended actions m response thereto; - directions including instructions entered by an attending health care provider, and reminders directing the patient to take medications (the recording unit may log compliance by monitoring when the patient swallows if the medication is to be taken orally, or monitoring breathing patterns if the medication is to be taken is m aerosol form) . In addition to providing such messages, the recording/alarm unit 40 may monitor the patient for effectiveness and proper functioning of assisted ventilatory ana continuous positive air pressure (CPAP) devices The recording/alarm unit 40 also logs data into ~ database as physiologic waveforms for one -minute numerical trends which may be transmitted to tne remote receiving unit 50 automatically or upon receipt of a request for review by the provider at the remote receiving unit 50 Tables 1 and 2 provide examples of common disease relateα diagnoses and facility types and the adverse conditions which can be monitored by the sensors of the NIMshirt 10. The tables also list the various functions of each sensor for each adverse condition to be monitored. Instead of concurrently collecting data from all of tne sensors and detectors of the NIMshirt 10, the types of physiologic signs to be monitored may oe limited as a function of the specific condition of the patient. For example, if a patient has asthma, pertinent signs such as respiratory drive/ventilation (peak mspiratory flow/vent llation and/or peak mspiratory acceleration/ventilation) should be monitored closely as non-invasive signs of increasing bronchospasm apove a predetermined threshold. This measure will be utilized to provide directions to the monitored patient via output device 45, such for example, as "yoα have signs of bronchospasm; please take your aerosol medication now!" If aerosol medication is taken correctly and the proper breathholdmg pattern is observed by the recording/alarm unit 40, then output device may state, "aerosol taken, good 1 " If after 30 minutes, there is no improvement or there is a worsening of specific measures and/or vital signs, the recording/alarm unit 40 may state, "call your doctor immediately!" or "get transportation and go immediately to the emergency room." As another specific example, if the patient has chronic heart failure, then the deceleration time from the derivative of the left ventricular volume curve obtained with the thoracocardiograph, the central venous pressure and respiratory sinus arrhythmia should be closely monitored. The deceleration time has been found to be the most predictive sign that hospital admission is needed for treatment of chronic heart failure. In one study, values below 125 msec were the threshold associated with required hospital admission. Thresholds may be programmed into the recording/alarm unit 40 so that instructions are delivered to the patient being monitored before the 125 msec level is reached. For example, if the baseline deceleration time of 160 msec falls to 140 msec, then recording/alarm unit 40 may state, "take an additional diuretic tablet today at 5 PM." If the deceleration time falls to 120 msec, the recording/alarm unit 40 may state, "call your physician immediately " Central venous pressure reflects fluid balance m the body; low values indicate hypovolemia as might take place with overdosing with diuretics, and high values with increasing severity of heart failure. Thus, if CVP on one day is 8cm H 0 and the following day is 4 cm H 2 0, the recording/alarm unit 40 might state "call your doctor immediately for advice on your medications " With regard to the monitoring of medicine taking compliance the desired times of day for taking medications are programmed into the recording/alarm unit 40 At appropriate times, the unit may state "take one capsule of #1 - or one capsule of verapamid now 1 " The recording/alarm unit 40 and/or microcontroller 30 may also include an input device 47 such, for example, as a bar code reader so that when the patient takes out a medication via- with a bar code, information from the bar code ±s passed to the optional bar code reader Alternately the patient may enter information on the medications using a manual input device 47 such as a keyboard or a simple array of buttons By clicking one of the buttons, the patient being monitored manually updates the recording/alarm device to indicate compliance with the scheduled medicine As mentioned above, when the patient takes medication, swallows may be logged from the neck inductive plethysmograph waveform, thereby suggesting compliance After the taking of medication, the patient may pass the vial over the optical reader or activate a switch to create window timing marks the data stream that can be analyzed and stored the recording/alarm unit 40 and/or receiving unit 50 The physiologic signs may also be programmed for monitoring effectiveness based upon CPAP or BiPAP ventilatory requirements Nocturnal CPAP and BiPAP are often used for treatment of the obstructive sleep apnea syndrome, which is marked by apneas and increases m upper airway mspiratory resistance The ratio of peak mspiratory flow to mean mspiratorv flow (PIF/MIF) , derived from the tidal volume waveform of the respiratory inductive plethysmograph 20, 21, provides a numerical value for the shape of the mspiratory flow curve. An unobstructed mspiratory flow contour has a sinusoidal shape and the value of this parameter, PIF/MIF, is τr/2 = 1.57. As an mspiratory obstruction develops, the mspiratory flow waveform becomes flattened and approaches a PIF/MIF value of 1.0. Significant flattening begins with a threshold value at or below 1.3 In some instances, mspiratory obstruction is marked by a brief prominent spike near beginning inspiration that gives PIF/MIF values of approximately 1.85 or greater. Therefore, optimum CPAP should provide values ranging from 1.3 to 1.85. If PIF/MF is found to be equivalent to 1.2 for a predetermined period of time, then the recording/alarm unit may deliver a message to the patient or to the personal health care provider, with increasing decibels of sound until the proϋle is corrected, stating "increase CPAP 3 cm water pressure now" . Other investigators have described algorithms for automatic adjustment of the level of CPAP pressure based upon indices related to the shape of the mspiratory flow curve. Since CPAP is generally administered using a nasal mask, it is subject to leaks, particularly at the mask-skm interface. Leaks can be discerned by the recording/alarm unit 40 by comparing the tidal volumes between the values delivered from the CPAP apparatus and those received by the patient. The latter is obtained with respiratory inductive plethysmography using the sensors 20, 21. For example, if the mspiratory volume per breath from respiratory inductive plethysmography sensors 20, 21 was found to be 200 ml and the volume delivered by the CPAP device is 500 ml, then a leak m the CPAP system of 300 ml is indicated and the recording/alarm unit may state "wake up and adjust your mask, it -s leaking " Mask leaks are also a problem m administering ventilatory support to patients with resprratory failure or respiratory muscle weakness Monitoring of volumes delivered versus volumes received is effective m diagnosing such leaks . Thus, while there have shown and described and pointed out fundamental novel features of the invention as applied to a preferred embodiment thereof, it will be understood that various omissions and substitutions and changes m the form and details of the devices illustrated, and m their operation, may Pe made by those skilled m the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function m substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements and/or method steps shown and/or described connection with any disclosed form or embodiment of tne invention may be incorporated m any other disclosed or descrrbed or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto . Thus, while there have shown and described and pointed out fundamental novel features of the mvention as applied to preferred embodiments thereof, it will oe understood that various omissions and substitutions and changes m the form and details of the devices illustrated, and their operation, may be made by those skilled m the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function m substantially the same way to achieve the same results are within the scope of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto . Table 1 * 0) c σ 0) H C H m tn x m 21 c r m M σ> N D Not Diagnostic Table 2 ' ω c CD H C H m ω x m q 31 C r m* ro N D. Not Diagnostic Table 3 Comparisons of Current Commercial Technologies to NimShirt c CD <Λ H =? C H m en x m si 30 C ιo ' ' Repiesentative manufactuiei .

Claims: CLAIMS We claim 1. A non- invasive physiological monitoring system for monitoring a physiological sign of a patient, comprising: a garment fitting over the torso of a patient to be monitored, a non- invasive sensor attached to said garment for generating a first signal m response to the physiological sign of the patient when the garment is placeα about the torso of the patient; a first wireless transmitter carried on said garment and operatively connected to said sensor for receiving said first signal and for transmitting the generated first signal from the garment; and a processor unit remote from the garment and comprising a wireless receiver for receiving the transmitted first signal and an output device for generating messages to the patient m response to and related to the generated first signal. 2. The system of claim 1, wherein said processor unit further comprises a database for logging the first signal on a periodic basis. 3. The system of claim 2, wherein said processor unit further comprises a second transmitter for transmitting information related to said transmitted first signal from said processor unit via a communications link, and wherein the system further comprises a receiving unit located at a location remote from said processor unit for receiving said transmitted information signal at the remote location to thereby allow monitoring of the first signal at the remote location. 4 The system of claim 3 , wherein said receiving unit comprises means for transmitting a command to said processor unit via the communications link for one of sending a message to the patient through said output device, reading the database, writing to the database, and altering a response of the processor unit to the first transmittal signal . 5. The system of claim 3, wherein the communication l nk comprises one of a telephone line connection, an internet connection, a satellite hookup, a cable connection, and a modem connection. 6. A non- invasive physiological monitoring system for monitoring physiological signs of a patient, comprising: a garment fitting over the torso of a patient to be monitored; a plurality of plethysmographic sensors attached to said garment for generating first signals m response to physiological signs of the patient when the garment is placed about the torso of the patient; an electrocardiogram (ECG) electrode attached to said garment for generating a second signal m response to another physiological sign of the patient when the garment is placed about the torso of the patient, a transmitter attached to said garment and connected to said plurality of plethysmographic sensors and said electrocardiogram electrode for transmitting the first and second signals from the garment ; and a processor unit remote from the garment and comprising a receiver for receiving the transmitted first and second signals, a monitoring unit for receiving the first signals and second signal from the processor unit receiver, and an output device for generating and outputtmg messages to the patient m response to and related to the first and second signals . 7. The system of claim 6, wherein each of said plurality of plethysmographic sensors comprises one of a neck inductive plethysmographic sensor, a respiratory mαuctive plethysmographic sensor, a thoracic inductive plethysmographic sensor, a hemithoracic inductive plethysmographic sensors, and a limb inductive plethysmographic sensor. 8. The system of claim 6, further comprising a body position sensor signally connected to said processor for indicating a posture of the patient . 9. The system of claim 6 , further comprising a pulse oximeter sensor signally connected to the processor 10 The system of claim 6, wherein said processor unit further comprises a database for periodically logging the first and second signals. 11. The system of claim 6, wherein said output device comprises an audio system for generating voice messages m response to the first and second signals 12. The system of claim 6, wherein said output device comprises a display unit for displaying viewable messages m response to the first and second signals. 13. The system of claim 12, further comprising a signalling device for activation to signal the patient when said processor unit generates a message to the patient. 14 Tne system of claim 13 , wherein said signalling device comprises one of an lllummatable light mounted on one of the garment and the processor unit, an audible noise generating device mounted on one of the garment and the processor unit, and a vibrating device mounted on the garment. 15. The system of claim 6, wherein said processor unit comprises a second transmitter for transmitting from the processor unit said first and second signals via a communication link, and wherein said system further comprises a receiving unit at a location remote from said processor for receiving the first and second signals transmitted by said second transmitter to thereby allow monitoring of the first and second signals by one of a person and a device at the remote location 16. The system of claim 15, wherein said communication link comprises one of a telephone line connection, an internet connection, a satellite hookup, a cable connection, and a modem connection. 17. The system of claim 15, wherein said receiving unit comprises means for transmitting a message to said unit for output to the patient via the output device. 18. The system of claim 6, wherein said processor unit further comprises an input device for one of inputting commands to said processor unit and confirming actions requested by said processor m messages output to the patient by the processor unit . 19. The system of claim 6, further comprising one of an oscillator demodulator witn multiplexer functions and a plurality of oscillator modules connected carried on said garments and between said plural of plethysmographic sensors and said transmitter 20. A non- invasive physiological monitoring system for monitoring physiological signs of a patient, comprising: a garment fitting over the torso of a patient to be monitored; a plurality of non- invasive sensors attached to said garment for generating signals in response to the physiological signs of the patient when the garment is placed about the torso of the patient; a transmitter attached to said garment and connected to said plurality of non-invasive sensors for transmittig the signals generated by said plural sensors ; a processor unit remote from the garment and signally connected to said transmitter via a wireless communication link for receiving the generated signals, and comprising a monitoring unit for receiving the transmitted signals and for detecting from the received signals adverse or preprogrammed conditions, and an output device for generating and outputting messages to the patient in response to the received signals and the monitoring unit . 21. The system of claim 20, wherein said plurality of non-invasive sensors comprises a plurality of plethysmographic sensors, and wherein said transmitter further comprises one of an oscillator demodulator with multiplexer functions and a plurality of oscillator modules connected to said plurality of plethysmographic sensors. 22. The system of claim 21, wherein each of said plurality of plethysmographic sensors comprises one of a neck inductive plethysmographic sensor, a respiratory inductive plethysmographic sensor, a thoracic inductive plethysmographic sensor, a hemithoracic inductive plethysmographic sensors, and a limb inductive plethysmographic sensor. 23. The system of claim 22, wherein said plurality of non- invasive sensors further comprises an electrocardiogram electrode. 24. The system of claim 21, wherein said processor unit further comprises a database for logging the received signals on a periodic basis. 25. The system of claim 24, further comprising a receiving unit at a location remote from said processor and signally connected to said processor unit for receiving from said processing unit said generated signals and thereby allowing monitoring of said generated signals at the remote location. 26. The system of claim 25, wherein said processor unit is connected to said receiving unit via a long distance communication link. 27. The system of claim 24, wherein said long distance communication link comprises one of a telephone connection, a modem connection, an internet connection, a satellite hookup, and a cable connection . 28. The system of claim 25, wherein said receiving unit comprises means for transmitting a command to said processor unit for one of sending a message to the patient through said output device, reading the database, writing to the database, and altering a response of the processor unit to the received signals. 29. The system of claim 20, wherein said transmitter transmits the generated signals from the garment at a sampling rate of at least 25 points per second. 30. The system of claim 20, wherein said transmitter generates a trend value on a periodic basis from each of the generated signals and transmits from the garment to said processing unit only the periodic trend value. 31. The system of claim 30, wherein said transmitter transmits the generated signals at a sampling rate of at least 25 points per second when the monitoring unit detects an adverse or preprogrammed condition.

Inventors: INMAN D MICHAEL, SACKNER MARVIN A, INMAN, D., MICHAEL, SACKNER, MARVIN, A.
Applicants: NIMS INC, NIMS, INC.
Application year: 1998
Main classification: A61N1
IPC codes: A61B5, A61N1