WO1989004140A1 - Pregnancy monitoring device - Google Patents

Pregnancy monitoring device Download PDF

Info

Publication number
WO1989004140A1
WO1989004140A1 PCT/GB1987/000804 GB8700804W WO8904140A1 WO 1989004140 A1 WO1989004140 A1 WO 1989004140A1 GB 8700804 W GB8700804 W GB 8700804W WO 8904140 A1 WO8904140 A1 WO 8904140A1
Authority
WO
WIPO (PCT)
Prior art keywords
time
characterised
device
clock
device according
Prior art date
Application number
PCT/GB1987/000804
Other languages
French (fr)
Inventor
Joseph Henry Ruston
John Lazar Barbur
Original Assignee
Joseph Henry Ruston
John Lazar Barbur
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB08611371A external-priority patent/GB2193015A/en
Application filed by Joseph Henry Ruston, John Lazar Barbur filed Critical Joseph Henry Ruston
Priority to PCT/GB1987/000804 priority Critical patent/WO1989004140A1/en
Publication of WO1989004140A1 publication Critical patent/WO1989004140A1/en

Links

Classifications

    • GPHYSICS
    • G04HOROLOGY
    • G04GELECTRONIC TIME-PIECES
    • G04G21/00Input or output devices integrated in time-pieces
    • G04G21/02Detectors of external physical values, e.g. temperature
    • G04G21/025Detectors of external physical values, e.g. temperature for measuring physiological data
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/103Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb

Abstract

A pregnancy monitoring device to be worn on the body, e.g. as a pendant or bracelet, and including a switch (3) arranged to input fetal movements in a given time period to a microprocessor (1) for display (4).

Description

Pregnancy Monitoring Device

This invention relates to a pregnancy monitoring device.

Research has shown that movement in the womb is a reliable indication of the health of an unborn child, such movement being known as fetal movement.

Such movements are readily detectable and recordable using the facilities available in hospitals, but while pregnant women are not in a hospital it is advantageous for them to count the number of fetal movements experienced over a specified period each day and report the results when they next visit an ante-natal c inic or their doctor.

Manual methods of recording fetal movement exist whereby a pregnant woman must remember to count the number of fetal movements felt after a pre-arranged start time. When she has counted to ten she looks at her watch and writes down the time. However, the reliability and accuracy of such methods is limited. If there is an abnormality in the pattern of fetal movements, then this may not be noticed. There is no provision for recording each movement as soon as it occurs. According to this invention a pregnancy monitoring device adapted to be carried by a pregnant woman, comprises a housing containing a microprocessor and having a display capable of selectively displaying the time, the expected delivery date, the time elapsed since the start of pregnancy, and the time remaining until the expected delivery date, the information to be displayed being derived from the microprocessor after the input of the necessary information.

Also according to this invention there is provided a pregnancy monitoring device adapted to be carried by a pregnant woman, comprising input means operative to indicate a fetal movement; a counter arranged to count the number of operations of the input means; and a rm means operative to give an alarm indication to the user when an abnormal pattern of operation of the input means occurs .

An abnormal pattern of operation of the input means can be when no count is started within a predetermined period from commencement of use of the device; when the number of actuations of the input means in a monitoring period is less than a predetermined number; or when an analysis of the number of operations of the input means in each of a plurality, for example three, of monitoring periods indicates an abnormal pattern. An advantage of the device compared with a manual system is the improved accuracy, but in addition because the fetal movements can be recorded as soon as they occur.

For example, a baby in distress often exhibits an increased kick-rate prior to the kick-rate's decline. With a manual system, there is no provision for recording the rate of kicks. Using a device according to the invention there is an'increased detection of an abnormality.

This invention will now be described by way of example with reference to the drawing in which

Figure 1 is a block schematic circuit diagram of a device according to the invention; and

Figure 2 is a diagrammatic front view of the device of. Figure 1.

Figure 3a is a table of the modes and registers used in the microprocessor,and to what they relate.

Figure 3b is a flow diagram showing the operation of the circuit. The device can be in the form of a pendant to hang around the neck or bracelet or wristwatch to be worn around the wrist by a pregnant woman, the device being usable to monitor the pregnancy.

The device comprises a housing 20 containing electronic circuitry and a battery power supply 10 for the circuitry. The circuitry includes a microprocessor 1 and associated real time clock 2 responsive to input signals from an input means in the form of a switch C actuable by a user of the device, to control a liquid crystal display means 4 and an alarm means 5.

The microprocessor 1 is of known type and comprises an Hitachi model HD63705. The real time clock 2 is of a model type 58321. The display 4 comprises a dot matrix display Hitachi model LM052 . All the components are of known type, but have not previously been arranged to produce a device according to the invention.

The microprocessor provides a first, real time clock operative to indicate normal time; a second clock indicating elapsed pregnancy time, ie how long the user of the device has been pregnant; a third clock indicating remaining pregnancy time, ie time remaining to expected date of delivery; and a fourth clock associated with the counting of fetal movements and operative to indicate the time taken for ten operations of the input switch 3 indicating fetal movements and also to indicate to the user of the device when each monitoring period should start. Associated with the fourth clock is a counter responsive to the input switch 3 to count the number of operations thereof.

Use of the device is initiated by insertion of the battery 10 whereupon the user sets the clocks in the microprocessor 1, in known manner, such that the first clock can indicate the correct time, the third clock is counting down to the expected date of delivery, and the fourth clock is counting down to the time when the first fetal movement monitoring period is to start. The output of the second clock is calculated in the microprocessor 1 from the readings of the other clocks. The device is then in a wait mode in which the times indicated by the clocks can be displayed on the display means 4 by appropriate operation of the switch 3 on the housing 20.

When the time to start the first fetal movement monitoring period is reached by the fourth clock an audible signal is issued and the display means 4 operated to indicate to the user that a switch 7 should be operated to start a monitoring period. If the switch 7 is not operated the audible signal stops after one minute but is thereafter repeated at three hourly intervals. On the third repetition with no operation of the switch 7 the device reverts to an alarm mode and the alarm means 5 is operated to give an audible alarm signal.

After operation of the switch 7 the device enters a count mode in which the display means 4 displays the number of operations of the input switch 3 counted by the counter and the elapsed time since the start of the monitoring period. The monitoring period is ended when the counter reaches a count of ten or the elapsed time reaches twelve hours.

The information displayed on the display means 4 at the end of the monitoring period is then stored by the microprocessor. The information may be, for example, the number of fetal movements recorded in each monitoring period of say twelve hours or the times taken to record successive counts of ten fetal mo ements. The information is displayable on demand for a given period of time, for example, seven days. At the end of this period the information could either be recorded manually, or the device read when the user visits the ante-natal clinic or their doctor.

After the monitoring period the user operates the switch 7 to return the device to the wait mode ready for issue of the audible signal when the next monitoring period is to be started as determined by the fourth clock.

If the device determines an abnormal pattern of operation of the input switch 3 then the device enters an alarm mode in which the alarm means 5 is operated to give an audible alarm and an alarm display is given on the display means 4. An abnormal pattern of operation of the input switch 3 can be when there is no operation thereof within a predetermined time from commencement of use of the device; when the number of operations of the input switch 3 in a monitoring period is less than a predetermined number; or when an analysis of the number of operations of the input switch 3 in each of a plurality of consecutive monitoring periods indicates an abnormal pattern, the analysis being carried out by the microprocessor 1.

The alarm mode can be cancelled by operation of the switch 3 to return the device to the wait mode ready for another monitoring period to be initiated.

Figures 3a and 3b show, schematically, the nature of the program used by the microprocessor 1.

Referring to Figure 3a this shows the nature of the various modes of operation of the device, and what each mode relates to. The register shows the variables used within the program, and to what they relate.

Figure 3b shows, schematically, the program used by the device. As shown the program progresses through, checking the state of the flags corresponding to the various modes. If the flag is set, then the program jumps to the subroutine corresponding to that mode.

The interrupt that the microprocessor receives may arise from the kick, interrupt routine which is initiated when the 'read' switch 7 is depressed. This routine causes the device to enter the counting mode 1 . The timer interrupt routine is initated from the 1 Hz pulses given out from the real time clock 2. This causes the clocks to increment and decrement the hours and minutes etc. In addition, when the time arrives for the monitoring period to begin, an interrupt is sent and the device is set to mode 1.

The housing of the device has an area (not shown) on which details of the user can be entered in legible form to assist in times of any emergency.

The device described above is intended to be worn by the user throughout pregnancy even though it will not be used to count and monitor fetal movements until say the last twenty weeks of the pregnancy. During the early weeks the device will serve as a time monitor capable of displaying the times indicated by the first, second and third clocks on the display means 4 by appropriate operation of the switch 30, and will also serve simply as a data carrier to assist in case of an. emergency. After experiencing the first fetal movement the user triggers the device by operation of a recessed switch 40, this bringing into operation the fetal movement monitoring functions of the device.

The pregnancy monitoring device is not limited to the embodiment shown. The microprocessor 1 can be such that more sophisticated analysis can be made upon the data. For example, the rate of fetal movements during a monitoring period could be measured and the alarm sounded if there were any abnormal pattern present in this rate.

Claims

89/04140 t 0CLAIMS
1. A pregnancy monitoring device characterised by housing containing a microprocessor (1) and having a display
(4) capable of selectively disp aying the time, the expected delivery date, the time elapsed since the start of pregnancy, and the time remaining until the expected delivery date, the information to be displayed being derived from the microprocessor after the input of the necessary information by the user.
2. A device according to Claim 1, characterised by input means (3) operative to indicate a fetal movement; a counter arranged to count the number of operations of the input means; and alarm means (5) operative to give an alarm indication to the user when an abnormal pattern of operation of the input means occurs.
3. A device according to Claim 2, characterised in that the alarm means (5) is arranged to give an alarm indication when no count is started within a predetermined period from commencement of use of the device; or when the number of actuations of the input means in a monitoring period is less than a predetermined number; or when an analysis of the number of operations of the input means in each of a plurality of monitoring periods indicates an abnormal pattern; or when an analysis of the rate of fetal movements within a monitoring period gives an indication of an abnormal pattern.
4. A device according to any preceding Claim, characterised in that the microprocessor (1) is arranged to provide a first, real time clock operative to indicate normal time; a second clock indicating elapsed pregnancy time; a third clock indicating remaining pregnancy time; and a fourth clock to indicate the time taken for a predetermined number of operations of the switch, each operation corresponding to a fetal movement, and a counter associated with the fourth clock.
5. A device according to Claim 4, characterised in that an audible or visual signal is made when the time to start the first fetal movement monitoring period is reached by the fourth clock.
6. A device according to Claim 5, characterised in that an audible alarm signal is made if no input signals are received after three successive fetal monitoring periods.
7. A device according to any preceding Claim, characterised in that the microprocessor is arranged to store recorded information and display it on demand on the display means (4).
8. A device according to any preceding Claim characterised in that the device is in the form of a wristwatch, pendant or- bracelet.
PCT/GB1987/000804 1987-11-11 1987-11-11 Pregnancy monitoring device WO1989004140A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/GB1987/000804 WO1989004140A1 (en) 1987-11-11 1987-11-11 Pregnancy monitoring device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB08611371A GB2193015A (en) 1986-05-09 1986-05-09 Pregnancy monitoring device
PCT/GB1987/000804 WO1989004140A1 (en) 1987-11-11 1987-11-11 Pregnancy monitoring device

Publications (1)

Publication Number Publication Date
WO1989004140A1 true WO1989004140A1 (en) 1989-05-18

Family

ID=10610684

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1987/000804 WO1989004140A1 (en) 1987-11-11 1987-11-11 Pregnancy monitoring device

Country Status (1)

Country Link
WO (1) WO1989004140A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052020A1 (en) * 1998-04-03 1999-10-14 Rosenblatt Peter L Method and device for counting and recording fetal movement
EP0978252A2 (en) * 1998-08-06 2000-02-09 Medtronic Inc. Ambulatory recorder having sliding period switches
US7402143B2 (en) 2002-08-01 2008-07-22 Biopad Ltd Bio-filter pad for facilitating the detection of an occurrence of a physiological action and method therefor and fetal activity monitoring apparatus
US8075500B2 (en) 2007-07-17 2011-12-13 Biopad Ltd. Fetal wellbeing monitoring apparatus and pad therefor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1224720A (en) * 1959-05-21 1960-06-27 Medical circular gestation Graphic
US4197856A (en) * 1978-04-10 1980-04-15 Northrop Robert B Ultrasonic respiration/convulsion monitoring apparatus and method for its use
US4367527A (en) * 1978-08-09 1983-01-04 Bioself International Inc. Pocket calculator for the forecasting of temporal cycles
EP0080417A1 (en) * 1981-11-20 1983-06-01 Universite De Franche-Comte Method of recording foetal movements during pregnancy, and apparatus therefor
WO1983002015A1 (en) * 1981-11-25 1983-06-09 Forbath, Frank, P. Medical timing system for use during pregnancy and method of using same
GB2154768A (en) * 1984-02-18 1985-09-11 Dataface Ltd Improvements in animal breeding record keeping
GB2193015A (en) * 1986-05-09 1988-01-27 Joseph Henry Ruston Pregnancy monitoring device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1224720A (en) * 1959-05-21 1960-06-27 Medical circular gestation Graphic
US4197856A (en) * 1978-04-10 1980-04-15 Northrop Robert B Ultrasonic respiration/convulsion monitoring apparatus and method for its use
US4367527A (en) * 1978-08-09 1983-01-04 Bioself International Inc. Pocket calculator for the forecasting of temporal cycles
EP0080417A1 (en) * 1981-11-20 1983-06-01 Universite De Franche-Comte Method of recording foetal movements during pregnancy, and apparatus therefor
WO1983002015A1 (en) * 1981-11-25 1983-06-09 Forbath, Frank, P. Medical timing system for use during pregnancy and method of using same
GB2154768A (en) * 1984-02-18 1985-09-11 Dataface Ltd Improvements in animal breeding record keeping
GB2193015A (en) * 1986-05-09 1988-01-27 Joseph Henry Ruston Pregnancy monitoring device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, volume 2, no. 106, 31 August 1978, page E 78; & JP-A-5370862 (SUWA SEIKOSHA K.K.) 23 June 1978 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052020A1 (en) * 1998-04-03 1999-10-14 Rosenblatt Peter L Method and device for counting and recording fetal movement
EP0978252A2 (en) * 1998-08-06 2000-02-09 Medtronic Inc. Ambulatory recorder having sliding period switches
EP0978252A3 (en) * 1998-08-06 2001-04-04 Medtronic Inc. Ambulatory recorder having sliding period switches
US7402143B2 (en) 2002-08-01 2008-07-22 Biopad Ltd Bio-filter pad for facilitating the detection of an occurrence of a physiological action and method therefor and fetal activity monitoring apparatus
US8075500B2 (en) 2007-07-17 2011-12-13 Biopad Ltd. Fetal wellbeing monitoring apparatus and pad therefor

Similar Documents

Publication Publication Date Title
US3672155A (en) Solid state watch
US6249717B1 (en) Liquid medication dispenser apparatus
US5805051A (en) Interactive medication reminder/dispenser device
US4100401A (en) Calorie calculator-chronometer
US5691932A (en) Care giver data collection and reminder system
US3940742A (en) Data acquisition, storage and display system
US5438996A (en) Ambulatory, ultrasonic transit time, real-time, cervical effacement and dilatation monitor with disposable probes
US4970669A (en) Medication clock
US6078549A (en) Rest pattern timing system
US6248090B1 (en) Syringe with electronic representation of parameters
US5868135A (en) Interactive patient assistance device for storing and dispensing a testing device
EP0028929B1 (en) Dose indicator for inhalers
US4490711A (en) Electronic programmable multiple alarm timing device and record
US4600010A (en) Electric stimulator and test instrument therefor
US5088056A (en) Medication clock
US4641661A (en) Electronic algesimeter
US4053951A (en) Data acquisition, storage and display system
US3973251A (en) Timing device for exercise program with signalling means
US7113450B2 (en) Wearable electronic device with multiple display functionality
EP0342859B1 (en) Interactive patient assistance system
US4101071A (en) Electronic calorie counter
US4709331A (en) Calculator-computer for calculating infusion rates over varying time intervals
US4771791A (en) Apparatus for storing and displaying body temperature
US9629588B2 (en) Apparatus and method for monitoring blood glucose levels including convenient display of blood glucose value average and constituent values
EP0298627A2 (en) Medication clock

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU DK FI JP KR NO SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE