EP2488102A2 - Appareil et procédé de mesure d'une partie du corps - Google Patents
Appareil et procédé de mesure d'une partie du corpsInfo
- Publication number
- EP2488102A2 EP2488102A2 EP10763236A EP10763236A EP2488102A2 EP 2488102 A2 EP2488102 A2 EP 2488102A2 EP 10763236 A EP10763236 A EP 10763236A EP 10763236 A EP10763236 A EP 10763236A EP 2488102 A2 EP2488102 A2 EP 2488102A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sensing elements
- curvature
- electronic system
- sensing
- measure
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
Classifications
-
- 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
- A61B5/6813—Specially adapted to be attached to a specific body part
- A61B5/6814—Head
-
- 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
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
-
- 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
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
- A61B5/1071—Measuring physical dimensions, e.g. size of the entire body or parts thereof measuring angles, e.g. using goniometers
-
- 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
-
- 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
- A61B2562/04—Arrangements of multiple sensors of the same type
- A61B2562/043—Arrangements of multiple sensors of the same type in a linear array
Definitions
- the present invention relates to the measurement of characteristics relating to body parts, such as a human head (e.g., an infant's head), and more particularly, to an apparatus and method for measuring a characteristic, such as the degree of curvature or surface profile, of a body part or portion of a body part, such as a human head, that employs a plurality of sensing elements having electrical characteristics that vary in a predictable manner as the sensing elements are bent.
- a characteristic such as the degree of curvature or surface profile
- an apparatus for measuring a characteristic of a body part includes an elongated, flexible, inextensible substrate, a plurality of sensing elements provided along the substrate, and an electronic system, each of the sensing elements being operatively coupled to the electronic system.
- Each of the sensing elements (i) has a component wherein an electrical characteristic of the component (such as resistance, inductance or capacitance) changes predictably in response to the component being bent, and (ii) provides a signal that is indicative of a current value of the electrical characteristic.
- the electronic system is structured to receive the signal of each of the sensing elements and determine a measure of a degree of curvature (such as radius of curvature) of the sensing element based on the received signal associated with the sensing element.
- the electronic system is also preferably structured to determine, based on the measure associated with each of a selected one or more of the sensing elements, a representation of a curvature of a segment defined by the selected one or more of the sensing elements.
- the electronic system may also be structured to determine curvilinear distance of the segment.
- the substrate, the sensing elements and the electronic system are provided together in a portable device.
- the segment may be a closed loop, and the electronic system may also be structured to determine that the closed loop has been formed, and perform a calibration adjustment for each of the second plurality of the sensing elements.
- the segment may also be something other than a closed loop, such as curved portion of the device.
- the apparatus includes a mechanism for determining that the closed loop has been formed and for identifying the sensing elements included in the closed loop.
- the mechanism may include a plurality of conductive pads provided along the substrate and a conductive element provided at a distal end of the substrate.
- the apparatus may include a mechanism for identifying the sensing elements of the segment that includes a plurality of conductive pads provided along the substrate and a conductive element that is slideable along the substrate.
- the electronic system may also be structured to determine an index of curvature deformity based on the measure associated with each of a selected set sensing elements, wherein the index of curvature deformity is determined by calculating a ratio comparing a smallest one of the measures in the set with a largest one of the measures in the set.
- a method of measuring a characteristic of a body part includes providing a plurality of sensing elements, each of the sensing elements (i) having a component wherein an electrical characteristic of the component changes predictably in response to the component being bent, and (ii) providing a signal that is indicative of a current value of the electrical characteristic, wrapping the sensing elements around at least a portion of the body part, receiving the signal of each of the sensing elements when the sensing elements are wrapped around the at least a portion of the body part, and determining a measure of a degree of curvature of each of the sensing elements based on the received signals.
- the method may also includes determining based on each measure a representation of a curvature of a segment defined by the plurality of the sensing elements when the sensing elements are wrapped around the at least a portion of the body part.
- Figure 1 is a schematic diagram of a measuring apparatus according to one particular embodiment of the present invention.
- Directional phrases used herein, such as, for example and without limitation, top, bottom, left, right, upper, lower, front, back, and derivatives thereof, relate to the orientation of the elements shown in the drawings and are not limiting upon the claims unless expressly recited therein.
- number shall mean one or an integer greater than one (i.e., a plurality).
- FIG. 1 is a schematic diagram of measuring apparatus 2 according to one particular embodiment of the present invention.
- Measuring apparatus 2 includes sensor strip 4 operatively coupled to electronic system 6.
- Sensor strip 4 includes elongated substrate 8 preferably made of a flexible, bendable, inelastic, inextensible material such as, without limitation, a flexible metal or plastic film.
- a plurality of sensing elements 10 are provided and positioned (via an appropriate attachment mechanism such as an adhesive) end to end along the length of sensor strip 4.
- sensor strip 4 is similar in shape, size and thickness to known measuring tapes.
- Each sensing element 10 includes a component or portion wherein an electrical characteristic of that component or portion, such as, without limitation, resistance, inductance, or capacitance, changes predictably and consistently in response to the component or portion, and thus the associated sensing element 10, being bent. Accordingly, the different values of the particular electrical characteristic that may result from the sensing element 10 being bent can be measured and then correlated to and or used to calculate particular degrees of deflection or curvature of the sensing element 10. In other words, for each sensing element 10, the current value of the particular electrical characteristic (e.g., resistance, inductance, or capacitance) may be used to determine a measure of the current degree of deflection or curvature (e.g., radius of curvature) of the sensing element 10.
- an electrical characteristic of that component or portion such as, without limitation, resistance, inductance, or capacitance
- each sensing element 10 is described in United States Patent No. 7,248,142, the disclosure of which is incorporated herein by reference.
- the ⁇ 42 patent describes a sensing device that includes a layer of variable resistance material that has a finite, base electrical resistance when the layer, and thus the sensing device, is flat (not bent), wherein the electrical resistance of the layer changes in predictable way as the layer, and thus the sensing device, is deflected or bent.
- the greater the amount of deflection the greater the resistance of the layer of material.
- sensing device of the ' 142 patent just described is meant to be exemplary only and not limiting, and it will be appreciated that other suitable sensing devices of different designs may also be employed within the scope of the present invention.
- electronic system 6 is operatively coupled to sensor strip 4, and in particular to each sensing element 10 of sensor strip 4.
- Electronic system 6 includes processor 12, which may be, for example and without limitation, a microprocessor, a microcontroller, or some other suitable custom designed controller circuit (e.g., an application specific integrated circuit (ASIC)).
- Memory 14 is coupled to processor 12.
- Memory 14 can be any of a variety of types of internal and/or external storage media such as, without limitation, RAM, ROM, EPROM(s), EEPROM(s), and the like, that provides a storage medium for data and software executable by processor 12 for controlling the operation of measuring apparatus 2 as described herein.
- processor 12 and memory 14, while shown as separate blocks in Figure 1, may be combined into a single component or device (i.e., with memory 14 being internal to processor 12).
- Electronic system 6 further includes user interface 16 operatively coupled to processor 12 for enabling data and/or instructions to be input into and/or output from electronic system 6.
- user interface 16 includes a keypad or the like for inputting data and control instructions into electronic system 6, and a display, such as an LCD, for displaying information relating to the measurements made by measuring apparatus 2 as described herein.
- Electronic system 6 also includes input source 18 for generating electrical input signal 20 that is provided to each sensing element 10.
- each sensing element 10 will, in response to receipt of electrical input signal 20, generate a specific output signal 22 (labeled 22A-22F in Figure 1) that is indicative of the current value of the particular varying electrical characteristic (e.g., resistance, inductance, capacitance) of the associated sensing element 10.
- Output signals 22 are provided to processor 12 of electronic system 6.
- processor 12 is programmed to determine a measure, such as radius of curvature, of the degree of curvature of each sensing element 10 based on the particular received output signal 22 associated with the sensing element 10.
- processor 12 is programmed to determine a
- processor 12 is programmed to determine a representation of the curvature and/or outer contour/shape of the loop based on each measure of degree of curvature of the particular sensing elements 10 included in the loop (see description below of how the particular sensing elements 10 of interest may be identified).
- sensor strip 4 may be wrapped fully or partially around the head of an infant and, based on output signals 22 received from the appropriate ones of the sensing elements 10, a representation of the curvature and/or outer contour/shape of the infant's head (or a portion thereof) may be determined by processor 12. That data may be stored in memory 14, and/or may be output to a clinician computer system for subsequent storage, analysis and/or use.
- processor 12 may be programmed to perform a self calibration when sensor strip 4 is formed into a complete closed loop (for example, as detected as described below), as processor 12 will expect that in such as condition, the individual curvature measures associated with each involved sensor element 10 should together form a closed loop. However, depending on the accuracy of the sensor elements 10, the calculated curve may not form a closed loop. The error of each sensor element 10 is essentially multiplied by the number of elements between that sensor element 10 and the end of the loop. Because these errors are compounded, the combined margin of error of all of these sensor elements 10 could result in a calculated arc that does not form a closed loop.
- the processor 12 could do a real-time uniform adjustment to sensor calibration in order to close the calculated loop, and thus improve accuracy.
- measuring apparatus 2 is provided with a mechanism for determining which particular ones of the sensing elements 10 are to be used in determining the representation of the curvature of a segment of the sensor strip 4.
- a mechanism is provided for defining which particular ones of the sensing elements 10 are included in the segment of interest so that only the measures of curvature associated with those particular sensing elements 10 will be used by the processor 12 to determine the representation of the curvature of the segment (the measures of curvature associated with the other sensing elements 10 will in that instance be ignored).
- That mechanism may include, in one embodiment, a plurality of conductive pads 24 provided along the length of the substrate 8 and a conductive element 26 provided at a distal end of the substrate 8.
- a circuit can be completed by causing the conductive element 26 to contact a specific pad 24. Such contact can be used as an indication that a closed loop has been formed.
- the identification of the specific pad 24 that is contacted can be used to determine which sensing elements 10 are of interest (i.e., within the closed loop), and which sensing elements 10 are not of interest (i.e., outside the closed loop). Also, the curvilinear distance of the segment (e.g., the
- circumference of a head which may also be of interest to caregivers, can be determined from the identification of the specific pad 24 that is contacted (based on a known spacing of the pads and/or a known length of sensing elements 10).
- that mechanism may also include a plurality of conductive pads 24 provided along the length of the substrate 8 and slideable conductive element 28 that is movable along the length of the substrate 8 such that a circuit is completed each time slideable conductive element 28 contacts a pad 24.
- the processor 12 can determine which pad 24 is being contacted and thus the length of the sensor strip 4 that is of interest (and therefore the particular sensing elements 10 that are of interest.) Also, the determined length can be used by processor 12 in order to determine the curvilinear distance of the segment, which, as described above, may also be of interest to caregivers.
- each sensing element 10 is a device, such as the one disclosed in the ' 142 patent, wherein the electrical resistance of each sensor element 10 changes in predictable way as each sensor element 10 is bent.
- electrical input signal 20 that is provided to each sensor element 10 is an input voltage having a particular voltage level
- each sensor element 10 also includes or is operatively coupled to a voltage divider circuit which, for each sensing element 10, produces an output signal 22 that is an output voltage having a level that is indicative of the current resistance of the associated sensor element 10.
- Processor 12 may then, upon receipt of each output voltage, determine the current resistance of the associated sensor element 10 and from that resistance determine a measure of the degree of curvature of the sensing element 10.
- each measure of curvature determined in this manner may then be used to determine a representation of the curvature and/or outer contour/shape of a loop formed by sensor strip 4, such as when sensor strip 4 is looped around the head of an infant.
- Sensor strip 4 (including associated circuitry) may, in one particular embodiment, for safety and environmental protection be enclosed in a sheath, protected between laminated layers of material, or molded into a compliant structure.
- measuring apparatus 2 as described herein may be integrated into existing caregiver workflows (which currently use measuring tapes to measure infant head circumference) and used to compute, store and track the curvature of an infant's head over time to indicate trends to caregivers and allow early intervention.
- measuring apparatus 2 may be used to periodically determine and store
- representations of the curvature of the infants head may then downloaded to a computer, such as a PC, of the caregiver (by coupling electronic system 6 to the computer through an appropriate connection such as using a USB cable or a docking station coupled to the computer) so that they can be stored, displayed and analyzed over time.
- the measured curvature information may be displayed graphically or numerically, or an overall index of curvature severity may be determined and displayed. This index would provide a quick indication of how "out-of-round" the loop measured actually is. In a perfectly round loop, all sensor elements 10 would measure the exact same radius of curvature. In an elongated curved closed loop, some sensor elements 10 would indicate a smaller radius of curvature than other sensor elements 10.
- An index of curvature deformity could be determined by calculating a ratio (referred to as a curvature deformity index ratio) comparing the smallest indicated radius of curvature from a sensor element or elements 10 to the largest indicated radius of curvature from a sensor element or elements 10. If a set of sensor elements 10 is considered, the curvature deformity index ratio could be further modified or weighted based on the number of sensor elements 10 meeting the "low” or "high” threshold to determine whether the deformity is in the general shape, or simply a localized anomaly.
- a ratio referred to as a curvature deformity index ratio
- the representations may be uploaded to a computer network, such as a hospital computer network, for storage and/or analysis either through the computer described above or directly from measuring device 2.
- those representations may be accessed from electronic system 6 (using user interface 16) manually and recorded in the medical record of the infant for later analysis.
- measuring device 2 can collect and stored representations for multiple infants and download and/or upload those representations as described. For example, a nurse could use measuring device 2 to collect data for a number of infants in a nursery and then download and/or upload that for storage in association with each infant's medical record.
- measuring apparatus 2 could use measuring apparatus 2 to monitor the progress of a particular therapy or treatment for plagiocephaly (such as a therapy or treatment that employs an orthotic device), or provide early detection of positional plagiocephaly during routine office visits.
- Other potential areas of application of measuring apparatus 2 include reconstructive plastic surgery, and similar applications where measurement of curvature of a body part is important to providing appropriate care.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Veterinary Medicine (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- Physics & Mathematics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
L'invention concerne un appareil de mesure d'une caractéristique d'une partie de corps, telle que la tête d'un nourrisson, lequel appareil comprend un substrat souple, une pluralité d'éléments de détection placés le long du substrat, et un système électronique. Chacun des éléments de détection (i) comporte un élément, une caractéristique électrique de l'élément se modifiant d'une manière prévisible en réponse à une courbure de l'élément, et (ii) délivre un signal reflétant la valeur réelle de la caractéristique électrique. Le système électronique est structuré de façon à recevoir le signal de chaque élément de détection et à déterminer une mesure du degré de courbure de l'élément de détection sur la base du signal reçu. Le système électronique est également structuré de façon à déterminer, sur la base d'une ou de plusieurs des mesures, une représentation de la courbure d'un segment, telle qu'une boucle, définie par un ou plusieurs éléments de détection sélectionnés parmi les éléments de détection.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US25175809P | 2009-10-15 | 2009-10-15 | |
PCT/IB2010/054142 WO2011045689A2 (fr) | 2009-10-15 | 2010-09-14 | Appareil et procédé de mesure d'une partie du corps |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2488102A2 true EP2488102A2 (fr) | 2012-08-22 |
Family
ID=43569370
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10763236A Withdrawn EP2488102A2 (fr) | 2009-10-15 | 2010-09-14 | Appareil et procédé de mesure d'une partie du corps |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2488102A2 (fr) |
JP (1) | JP2013508002A (fr) |
CN (1) | CN102686157A (fr) |
BR (1) | BR112012008497A2 (fr) |
WO (1) | WO2011045689A2 (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9612102B2 (en) * | 2015-04-17 | 2017-04-04 | Bend Labs, Inc | Compliant multi-region angular displacement and strain sensors |
CN105157666A (zh) * | 2015-09-21 | 2015-12-16 | 厦门大学 | 基于感知腔体形变传感器复位检测装置及其复位检测方法 |
US10088367B2 (en) * | 2015-09-23 | 2018-10-02 | Honeywell International Inc. | Body core temperature measurement |
CN108697376B (zh) | 2016-01-13 | 2022-03-18 | 丹麦专用绷带股份有限公司 | 水肿治疗和监测水肿治疗 |
WO2017121434A1 (fr) * | 2016-01-13 | 2017-07-20 | Specialbandager.Dk A/S | Dispositif et procédé pour fournir une mesure de la circonférence d'une partie du corps |
BE1024423B1 (fr) * | 2016-12-21 | 2018-02-13 | Idahealth Inc | Equipement de surveillance des flux sanguins et respiratoires |
KR101980804B1 (ko) * | 2017-02-14 | 2019-05-21 | 한국표준과학연구원 | 개인 맞춤형 최적 두상 구현 시스템 |
CN109717873A (zh) * | 2019-01-08 | 2019-05-07 | 上海海事大学 | 一种关节弯曲度数获取系统 |
CN115067932B (zh) * | 2022-08-16 | 2022-11-11 | 汕头大学医学院第二附属医院 | 一种新生儿身体测量设备 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4213348A (en) * | 1979-08-01 | 1980-07-22 | Medasonics, Inc. | Self-calibrating automatic zeroing strain gauge circuit |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6127672A (en) | 1997-05-23 | 2000-10-03 | Canadian Space Agency | Topological and motion measuring tool |
US7747312B2 (en) * | 2000-01-04 | 2010-06-29 | George Mason Intellectual Properties, Inc. | System and method for automatic shape registration and instrument tracking |
WO2007012068A2 (fr) | 2005-07-20 | 2007-01-25 | New York Society For The Ruptured And Crippled Maintaining The Hospital For Special Surgery | Dispositif servant a detecter, a corriger et a entrainer un mouvement |
JP4153963B2 (ja) * | 2006-06-12 | 2008-09-24 | オリンパスメディカルシステムズ株式会社 | 内視鏡挿入形状検出装置 |
-
2010
- 2010-09-14 JP JP2012533711A patent/JP2013508002A/ja not_active Withdrawn
- 2010-09-14 CN CN2010800462000A patent/CN102686157A/zh active Pending
- 2010-09-14 BR BR112012008497A patent/BR112012008497A2/pt not_active IP Right Cessation
- 2010-09-14 WO PCT/IB2010/054142 patent/WO2011045689A2/fr active Application Filing
- 2010-09-14 EP EP10763236A patent/EP2488102A2/fr not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4213348A (en) * | 1979-08-01 | 1980-07-22 | Medasonics, Inc. | Self-calibrating automatic zeroing strain gauge circuit |
Non-Patent Citations (1)
Title |
---|
See also references of WO2011045689A2 * |
Also Published As
Publication number | Publication date |
---|---|
JP2013508002A (ja) | 2013-03-07 |
CN102686157A (zh) | 2012-09-19 |
BR112012008497A2 (pt) | 2019-09-24 |
WO2011045689A3 (fr) | 2011-06-23 |
WO2011045689A2 (fr) | 2011-04-21 |
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