US20180110446A1 - Electronic equipment for the treatment and care of living beings - Google Patents

Electronic equipment for the treatment and care of living beings Download PDF

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Publication number
US20180110446A1
US20180110446A1 US15/568,528 US201615568528A US2018110446A1 US 20180110446 A1 US20180110446 A1 US 20180110446A1 US 201615568528 A US201615568528 A US 201615568528A US 2018110446 A1 US2018110446 A1 US 2018110446A1
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Prior art keywords
patient
receiving unit
sensing device
care
treatment
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Abandoned
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US15/568,528
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English (en)
Inventor
Alan Chamberlain
Alison Marshall
Nigel John Walker
Stephen Aubrey Clark
Timothy James Barry
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Tintro Ltd
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Tintro Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1121—Determining geometric values, e.g. centre of rotation or angular range of movement
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
    • A61B5/4538—Evaluating a particular part of the muscoloskeletal system or a particular medical condition
    • A61B5/4566—Evaluating the spine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6802—Sensor mounted on worn items
    • A61B5/6804—Garments; Clothes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0204—Acoustic sensors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0219—Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1113—Local tracking of patients, e.g. in a hospital or private home
    • A61B5/1114—Tracking parts of the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/112—Gait analysis

Definitions

  • This specification relates to electronic equipment and its use in the medical care and rehabilitation of people and animals as well as in research of medical conditions. It is also relevant to analysing movements of athletes, dancers, and the like to help perfect them and so improve performances and techniques. It is also applicable to inanimate objects.
  • perfecting movements and techniques is important, e.g. in improving performance (sports) or minimising injuries (sport and ballet).
  • sports sports
  • minimising injuries sports and ballet
  • One example is in bowling cricket balls, where players with unorthodox actions are often accused of ‘throwing’, i.e. keeping the bowling arm with an elbow extension of more than 15°.
  • the bowler's action can be monitored in real time to check whether the elbow is extending by a greater, or lesser amount.
  • the device could be able to measure the number of bowls and throws during a given period.
  • the electronic sensing device is attached to the patient by means of a strap.
  • the electronic sensing device is attached to the patient by adhesive means.
  • the means of providing electrical power is a battery or rechargeable cell.
  • the means of providing electrical power uses the patient's own body heat and/or energy harvested from motion or electromagnetic means.
  • the measured/monitored parameter is the patient's pulse and/or a heart rhythm(s).
  • the measured/monitored parameter relates to the patient's musculature.
  • the measured/monitored parameter relates to the patient's brain rhythm(s).
  • the measured/monitored parameter relates to the patient's breathing.
  • the measured/monitored parameter relates to the patient's joint movements.
  • the electronic sensing device includes an accelerometer.
  • the electronic sensing device includes a magnetometer.
  • the electronic sensing device includes a gyroscope.
  • the electronic sensing device includes a force sensor.
  • the electronic sensing device includes an accurate timing clock.
  • the receiving unit is either a device carried by the patient or a separate item not connected to the patient.
  • the means of downloading or transmission is via either hard wiring or electronic transmission.
  • the electronic sensing devices are attached to the patient by means of a strap.
  • the electronic sensing devices are attached to the patient by adhesive means.
  • the means of providing electrical power is a battery or rechargeable cell.
  • the means of providing electrical power uses the patient's own body heat and/or energy harvested from motion or electromagnetic means.
  • the measured/monitored parameter is the patient's pulse and/or a heart rhythm(s).
  • the measured/monitored parameter relates to the patient's musculature.
  • the measured/monitored parameter relates to the patient's brain rhythm(s).
  • the measured/monitored parameter relates to the patient's breathing.
  • the measured/monitored parameter relates to the patient's joint movements.
  • the electronic sensing device includes an accelerometer.
  • the electronic sensing device includes a magnetometer.
  • the electronic sensing device includes a gyroscope.
  • the electronic sensing device includes a force sensor.
  • the electronic sensing device includes an accurate timing clock.
  • the receiving unit is either a device carried by the patient or a separate item not connected to the patient.
  • the means of downloading or transmission is via either hard wiring or electronic transmission.
  • one, or more, electronic sensing device(s) are attached to a patient and used to monitor a parameter(s) of the patient, such as pulse, heart, brain rhythms, etc..
  • the data recorded may be processed by the sensing device itself and downloaded, or downloaded to a portable receiving unit and processed there or further downloaded to a separate processing means, where the results may also be displayed.
  • the sensing devices can also be used to measure the angular movement of joints and parameters relating to musculature. The principle is also applicable to measurement of spinal extensions and to perfecting athletic or dancing techniques.
  • FIG. 1 is a diagrammatic representation of the bowling action of a cricketer showing a flexed arm with an electronic sensing device of the invention attached;
  • FIG. 2 is a diagrammatic representation of a patient laying prone for the knee angular lateral movement to be measured, showing the position of the electronic sensing devices of the invention
  • FIG. 3 is a diagrammatic representation of a patient for the measurement of spinal extension/relaxation, showing the positions of the electronic sensing devices of the invention.
  • FIG. 4 is a diagrammatic representation of a curved spine as determined by the apparatus of the invention and by the method of using it.
  • a cricketer 1 is shown bowling with the upper 2 and lower 3 right arm flexing through an angle ⁇ at the elbow and with an electronic sensing device (sensor) 4 measuring particular ranges of motion, forces, and speeds of motion.
  • the sensor readings are either recorded for subsequent downloading and analysis or transferred, or processed within the sensor's own computing means.
  • the transfer may be either via hard wiring to a receiving unit (not shown) carried by bowler 1 for processing therein and thence electronically to a separate computing means or directly electronically to the computing means for analysis and display/print out.
  • Sensor 4 would measure the angular rotation 7 of arm 2 , 3 and the acceleration 8 up to when ball 5 is released at specific timed intervals, e.g. every millisecond. If the rotation 7 and acceleration 8 are smooth and progressive, the bowling would be correct and angle ⁇ would be within the 15° allowed. However, if there was a step change or discontinuity in the otherwise smooth action, this would indicate a ‘throw’.
  • a particular aspect of the exercise would be to count the number of ‘throws’ during, say, a match or a practice session as ‘throws’ cause extra stresses in the bones and joints and could lead to injury or exacerbate an existing injury. Thus, the sensor could lead to improving the technique and minimising the injury risk.
  • Sensor 4 may be attached adhesively, using a strap or via any other appropriate means to the patient 1 .
  • Another option is to use two sensors, one 4 on lower arm 3 and the other 4 A on upper arm 2 . If they are synchronised and take regular, simultaneous readings, the angle ⁇ can be directly computed 6 for each pair of readings. The results may be displayed graphically to show where any angular 6 discrepancy occurs and so correct the bowling action.
  • a sensor e.g. on a bowler's arm
  • Measurements taken at pre-set time intervals can be used to show the exact motion of limbs or joints in real time or slow motion for subsequent analysis. This is a powerful technique and can be used to identify and correct many problems, e.g. to rectify bow-legged gaits in young children.
  • bowling has been used as an example, the principle applies to any activity, e.g. in a sporting or athletic environment, dancing or work-related, etc.
  • the monitoring could be either for a short period in a clinical environment or the patient could wear the sensing device for a period of time, e.g. a day or a few days, with the readings either being stored in a memory within the device itself or transmitted to the receiving unit (not shown), which could be carried in the patient's pocket.
  • the advantage of the long term test is that the patient's normal usage of the limb will be revealed, rather than any ‘contrived’ usage in the clinical environment. Long term usage will reveal the patient's reactions, both when fresh in the morning and tired in the evening, which could be very helpful for the clinician's diagnosis.
  • the sensors may include timers, accelerometers, magnetometers, gyroscopes, or anything else as required, which would record the nature of the activities, e.g. sluggish or vigorous.
  • Sensors 4 may have their own power sources, e.g. a battery of rechargeable cell, or generate their own power, e.g. from the motion of the arm 2 , 3 , from the patient's own body heat using the Seebeck Effect or from electromagnetic signals beamed to the sensor.
  • Sensors 4 with their own power generation could be thinner, e.g. like a plaster, than those incorporating batteries and would be more suited to longer term activity monitoring.
  • the sensors may be used to compute the forces in the bones, tendons, etc. to guard against the risk of stress fractures.
  • a patient 10 is to have the angular, lateral freedom of their knee 18 measured.
  • the knee is basically a hinge moving in only a single plane and a degree of axial freedom is provided via the ligaments, tendons, hamstrings, and the rotation allowed by the hip joint.
  • the patient may have limited movement in the hip joint, so the leg is bent from side to side and measurements are taken to find how much the patient can move the limb laterally.
  • the measurement is made with patient 10 face down on a firm surface while the lower leg 19 , with knee 18 bent at a right angle to the surface, is moved laterally 15 with respect to the plane of the bent leg. In these circumstances, it is natural for the patient to try and roll to one side as a result of the force 14 applied.
  • a first sensor 11 is placed on the patient's skin on the sacrum and a second sensor 13 is placed near the ankle of the leg 19 to be measured.
  • the sensors 11 , 13 include an accelerometer, it can calculate changes in its orientation, using the force of gravity (to define a vertical plane of reference), and offer co-ordinates from the three axes it senses to other sensors or a further processing device. These co-ordinates are used to determine the datum angle between the two sensors before the start of the test. Though patient 10 is likely to move their pelvis or hip joint 12 or rotate 16 the femur during the manipulation 14 of lower leg 19 , sensors 11 and 13 will communicate with each other and automatically make allowance for the patient's movement to calculate the angular rotation 15 of the knee joint 18 and hip 12 only.
  • Sensors 11 and 13 may communicate with each other at a radio frequency and one of them would make this calculation, using the other's data, Alternatively, the calculation could be done by the receiving unit (not shown) or the further processing unit (not shown). However it is done, it would be an accurate and repeatable figure unlike that available from a current goniometer and so reduce the variability in measurements when taken by different clinicians.
  • the practitioner then has to remove the hip rotation angle to find out how much the patient's femur rotated on its own, which will then give a measurement of how well the hip joint is free to move.
  • the hip rotation is hard to assess, and measurements are dependent on an amount of ‘subjectivity’ both by the same practitioner on different occasions, and between different practitioners. Sometimes the practitioner has to remind the patient not to roll, but they can't avoid it, and that may not be noticed or can't be taken into account. This makes a reliable measurement of hip joint freedom very hard to make. Accelerometer-based measurement devices are known, but these only measure the one deflection angle on the leg in a similar way to the standard goniometer and do not take force applied into account.
  • This invention allows the practitioner to find an objective measurement of the deflection angle of the leg minus the angle of the hip rotation, and ensures the measurement is free from the variability and ‘subjectivity’ common in previous methods. This invention allows the same objective result to be found by the same practitioner at different times, or across different practitioners.
  • a force detector is incorporated in the sensor 11 , 13 , it can record the amount of force the clinician applies when manipulating the patient's lower leg.
  • an angle versus force applied calculation can be made and displayed, e.g. as graphs, figures, or a simple indication presented. It is known how far a healthy hip joint can be rotated with a given force, so that the lesser rotation of an unhealthy joint with the same force would give a definitive indication of the extent of stiffness in the joint.
  • This invention allows a practitioner to arrive at an objective measure of how far a joint may be moved when a predetermined amount of force is applied, and that value may be compared over time on the same patient's joint to allow an assessment of whether the joint is improving or not as a result of treatment, exercise, weight loss, medication, other interventions or life changes. Movement in other joints may also be measured in the same way, and more than one other angle may be subtracted from the final result.
  • the system may be implemented using two or more mobile phones with an optional extra force sensor.
  • An extra reference phone (not shown) may provide the readings while using others as sensors.
  • each electronic sensing device If a magnetometer is included in each electronic sensing device, the exact position, i.e. X, Y and Z coordinates and rotations, of each sensor can be determined with reference to a nearby reference magnet (or datum sensor) (not shown) both before and during (or after) the test.
  • a nearby reference magnet or datum sensor
  • Another example of the use of this aspect of the invention is the measurement of spinal parameters, e.g. extensions/compressions and curvatures.
  • spinal parameters e.g. extensions/compressions and curvatures.
  • the patient's weight is not acting to compress the spine, but when the person is standing, sitting vertically, or exercising, the discs between adjacent vertebrae are compressed axially.
  • getting accurate measurements of the shrinkage and/or curvature is problematic.
  • This invention provides a means of accurately finding changes in the static relative positions of points on a body over a period of time, as it can accurately measure absolute distances between sensors and then build a static model of the body using the mesh of distances plus the orientation of gravity.
  • the 3D model is accurate for finely resolving distances because the system calculates distances between sensors rather than relative motion, which is the purpose of motion capture systems.
  • FIG. 3 shows how such measurements can be obtained.
  • One sensor 21 is attached at the C7 vertebra and another 24 to the skin on the sacrum, as shown.
  • Intermediate sensors 22 and 23 are attached as appropriate, e.g. on vertebrae TH7 and TH12. All the sensors 21 , 22 , 23 and 24 can intercommunicate electronically, with one, e.g. 21 or 24 , sending out simultaneous radio signals, or signals via a cable, and audible signals, and the other three sensors, with receiving means, recording the exact times of arrival of both signals.
  • the radio signal, or cable signal is electronic and travels at the speed of light (299 792 458 m/s) but the audible signal travels more slowly at the speed of sound at that time (e.g.
  • each sensor may both send and receive signals. If the sensors 21 - 24 are attached to the patient, e.g. by adhesive means so that the patient can wear them for, say, a full 24 hours, and readings of ⁇ t are taken at regular time intervals, then the difference between the maximum ⁇ t H , i.e. with patient 20 horizontal after a night's sleep, and the minimum ⁇ t V , i.e. taken with the patient vertical after activity or after a period of time, will be a function of the spinal shrinkage. Thus, ( ⁇ t H - ⁇ t V ) x 332 will give the actual shrinkage in metres.
  • the sensors can give an indication of how much the spine is curved both laterally or posterior/anterior, because multiple sensors can measure distances between each other. If three sensors calculate their distances from each other, a triangle can be drawn to represent the sensors' positions with sides of those lengths, and then if the line of gravity is included (vertical direction), the triangle can be shown the in correct orientation. This triangle will show the positions of the sensors relative to each other in 3D space, and if that scheme is extended to many sensors, then the map of triangles created can represent a model of the body (spine) to which they're attached.
  • the sensors can be accurately placed over extended periods if marks are made on the skin using a medical marker (e.g.
  • the sensor can essentially be affixed to exactly the same place on the skin. Over a period of time, the sensor map can show if, for example, when standing, the (human patient's spine is becoming more curved or compressed, e.g. as a result of lifestyle or sports injury. Early intervention can prevent further spinal disc damage by encouraging the subject to reduce stresses on the spine or undergo physiotherapy targeting the affected area, because the patient may not know that they are at the start of a process of serious damage.
  • the collection of sensors already have their relative positions defined because they are placed at strategic points of the body such as the joints, and their distances apart are already known—the purpose is to gather data on how the body moves.
  • the purpose is to determine how far apart the sensors are without necessarily knowing it in the first place, and then to provide information on how those distances change over time so that for example the changes may indicate present or likely future problems.
  • the speed of sound in air varies according to various factors such as humidity, so the system can be calibrated just before use by positioning two sensors at a known distance apart, for example exactly 1 m, finding the signal propagation difference described above, and using that as a reference for future propagation differences.
  • An average of measurements may be taken to increase accuracy and to remove false readings caused by echoes from nearby objects.
  • An accurate clock in each sensor can be used to calculate distance instead of the radio or wired signalling, if each of the sensors' clocks are synchronised or before use.
  • a sensor emits an audio signal and includes data incorporating its exact time of transmission.
  • the receiving sensor calculates the distance from the sending one using the speed of sound plus its own knowledge of the time when it received the transmission compared with the time from the transmitting sensor, which allows it to calculate the time of travel of the transmission. If the sensors include radio transceivers, they can re-synchronise themselves from time to time if required.
  • sensors 21 - 24 are shown attached to the patient's spine 28 and they may be used to calculate, via trigonometry using the distances between the sensors, a 3D image and measurement ( FIG. 4 ) of the state of the spine, which can be used to calculate where and to what extent the spine is curved. Regular measurements will determine whether an increase in curvature had occurred during exercise or other activity.
  • a 3D model can be created and oriented correctly using the accelerometers' data to define which way up the model is in space.
  • FIG. 3 shows the distances computed between sensors, e.g. 25 between 24 and 23 , 26 between 24 and 22 and 27 between 24 and 21 . More sensors 21 - 24 may be used to identify which particular disc(s) is(are) causing the problem(s).
  • the sound used could be ultrasound, instead of audible sound, so that it did not disturb the patient when asleep and the signals could be sent out periodically with either the absolute values of ⁇ t recorded or the differences ( ⁇ t H - ⁇ t V ).
  • the receiving sensor could directly compute the ( ⁇ t H - ⁇ t V ) x 332 values and record the time of the measurement for subsequent downloading or display.
  • spinal extension has been used as the example here, the principle has other applications, e.g. to assess problems with hip, knee, ankle or foot joints between when a person is standing and lying down or with shoulder, elbow, wrist or hand joints in a person, who repeatedly has to lift heavy weights above his head, etc.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
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  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Public Health (AREA)
  • Medical Informatics (AREA)
  • General Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Physiology (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Rheumatology (AREA)
  • Geometry (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
US15/568,528 2015-04-22 2016-04-22 Electronic equipment for the treatment and care of living beings Abandoned US20180110446A1 (en)

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GB1506810.9 2015-04-22
GB1506810.9A GB2537644A (en) 2015-04-22 2015-04-22 Electronic equipment for the treatment and care of living beings
GB1604925.6 2016-03-23
GBGB1604925.6A GB201604925D0 (en) 2015-04-22 2016-03-23 Electronic equipment for the treatment and care of living beings
GB1606860.3A GB2537754B (en) 2015-04-22 2016-04-20 Electronic equipment for the treatment and care of living beings
GB1606860.3 2016-04-20
PCT/GB2016/051123 WO2016170354A2 (fr) 2015-04-22 2016-04-22 Équipement électronique pour le traitement et le soin d'êtres vivants

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CN113379888B (zh) * 2021-01-18 2023-08-22 兰州理工大学 一种基于二维图片的人体三维模型重建及参数测量方法

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