WO2008129414A2 - Device for the detection of articular forces - Google Patents

Device for the detection of articular forces Download PDF

Info

Publication number
WO2008129414A2
WO2008129414A2 PCT/IB2008/001011 IB2008001011W WO2008129414A2 WO 2008129414 A2 WO2008129414 A2 WO 2008129414A2 IB 2008001011 W IB2008001011 W IB 2008001011W WO 2008129414 A2 WO2008129414 A2 WO 2008129414A2
Authority
WO
WIPO (PCT)
Prior art keywords
rod
stress
deformable portion
articular
knee
Prior art date
Application number
PCT/IB2008/001011
Other languages
French (fr)
Other versions
WO2008129414A3 (en
Inventor
Giancarlo Ferrigno
Pietro Cerveri
Elena De Momi
Walter Pascale
Original Assignee
Istituto Ortopedico Galeazzi S.P.A.
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
Application filed by Istituto Ortopedico Galeazzi S.P.A. filed Critical Istituto Ortopedico Galeazzi S.P.A.
Publication of WO2008129414A2 publication Critical patent/WO2008129414A2/en
Publication of WO2008129414A3 publication Critical patent/WO2008129414A3/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0031—Implanted circuitry
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/03—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs
    • 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
    • A61B5/4528—Joints
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for
    • A61B2090/064—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension
    • 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
    • A61B2562/0247—Pressure sensors

Definitions

  • the present invention relates to a device for the detection of articular forces.
  • the invention relates to a device for the detection of articular forces, for measuring the state of stress present in an articulation, such as for example a knee.
  • the device is mini- invasive and reveals the state of mechanical stress present inside the articular capsule of the knee, under different load conditions, in different positions with respect to the thigh-bone and tibia, and under dynamic conditions. From the results of these measurements effected on both compartments (medial and lateral) , information is deduced on the mechanical unbalance condition of the articulation.
  • United States patent US 5,503,162 describes an arthroscopic instrument which evaluates the resistant stress expressed by the cartilage of the knee by means of a mechanical stress system automatically controlled by a computer. In parallel, a force transducer measures the mechanical resistance of the tissue.
  • Patent application US2002049382 describes an arthro- scopic device for measuring both the thickness of the cartilage by means of the ultrasound principle and the visco-elastic properties of the cartilage of the meniscus, by means of an integrated force sensor inside the device.
  • US patent 5,494,045 describes a device for measuring the mechanical resistance of cartilage tissue.
  • the instrument has an elongated form and can be used with the arthroscopic procedure. It is also equipped with mechani- cal stress system and measurement transducer.
  • the Applicant has observed however that this device is not suitable for measuring typical stress exerted on the overall articulation of the knee.
  • the Applicant is aware of the demand for obtaining a more sophisticated knowledge of articular mechanics, specific for each patient, immediately available in the pre- operating phase or directly in the intra-operating phase with a mini-invasive technique of the arthroscopic inter- vention.
  • the device according to the present invention guarantees the possibility of measuring a wide range of amplitudes of articular stress (0.1N-250N) with a high resolution. This information can be used for improving the quality of the surgical intervention, following pa- thologies or traumas, aimed at restoring the mechanical- physiological conditions.
  • the device can be applied for registering the articular pressure, the contact area and levels of stress before and after the repair intervention of the meniscus cartilage, for verifying the ligament balancing following arthroplastic interventions on the knee with the mini-invasive technique.
  • the use of the device proposed can be easily extended to evaluating the state of stress of other articulations such as the shoulder and ankle for both ar- throplasty and ligament surgery.
  • An aspect of the present invention relates to a device for revealing articular forces characterized in that it comprises a hollow rod which contains in its interior an incompressible fluid, at one end of said rod there be- ing a deformable portion sensitive to stress, at the opposite end of the rod with respect to that having the deformable portion, there being at least one pressure sensor suitable for measuring the stress exerted on the deformable portion of the rod itself.
  • FIG. 2a and 2b schematically illustrate the de- tection device according to the present invention.
  • the device according to the present invention comprises a hollow rod 2, preferably substantially rigid, of the arthroscopic tube type, made of a biocompatible material, such as for example surgical steel.
  • Said tube is suitable for con- taining an incompressible fluid (for example an aqueous solution at neutral pH, not in direct contact however with the biological structures) .
  • an incompressible fluid for example an aqueous solution at neutral pH, not in direct contact however with the biological structures
  • a deformable portion 3 sensitive to stress, for example compression, to be measured.
  • At the opposite end of the tube with respect to that having the deformable portion there is at least one pressure sensor 4 and an electronic card 5 suitable for receiving and processing the signal of said at least one sensor.
  • the pressure sen- sor measures the stress exerted on the deformable portion, which is transmitted by means of the incompressible liquid present inside the hollow rod to the pressure sensor.
  • Said card moreover, is capable of translating and transferring (for example in telemetry) the signals to an external electronic processing unit 6.
  • the device is advantageously surgically inserted in the knee, by access through the minimum skin (incision), and introduced inside the articular capsule. Its sensitive end (the flexible portion 3) is posi- tioned between the bone cartilage and the meniscus cartilage in the appropriate measuring seat .
  • the surgeon is guided by a classical arthroscopic vision ensured by the use of an arthroscope, inserted inside the knee through a mini-invasive-type ac- cess different from that used for the measuring device proposed.
  • the state of mechanical stress present deforms the septum and the variation in pressure induced in the fluid inside the rod of the device is transferred towards the other end of the rod (external with respect to the patient) and measured by pressure sensors.
  • the electronic card guarantees treatment of the signal and transferal towards an external processing or simple display unit.
  • the device can be applied for registering the articular pressure, contact area and levels of stress before and after a repair intervention of the meniscus cartilage, to verify the ligament balance following arthro- plastic operations on the knee with the mini- invasive technique.
  • the device according to the present invention can be easily used for evaluating the state of stress of other articulations such as the shoulder and ankle through both arthroplasty and ligament surgery.
  • the use of various pressure sensors positioned in parallel i.e. all measuring the same stress transmitted by the liquid in the rod) is advantageous as it increases the reliability of the measurement.
  • the non- compressibility of the liquid ensures that the signal is transferred without any loss towards the opposite end of the tube where the sensors are present .
  • This device is advantageously equipped with its own supply source for example low voltage (5 V) which feeds both the pressure sensors and the treatment and process- ing circuit of the signal.
  • low voltage 5 V
  • Said signal processing can advantageously comprise a signal conversion into digital format which is then transmitted via telemetry to the processing unit in said format .

Abstract

Device for the detection of articular stress comprising a hollow rod (2), containing in its interior an incompressible fluid. At one end of said rod, there is a deformable portion (3) sensitive to stress and at the opposite end of the rod with respect to that having the deformable portion, there is a pressure sensor (4) suitable for measuring the stress exerted on the deformable portion of the rod itself.

Description

DEVICE FOR THE DETECTION OF ARTICULAR FORCES
The present invention relates to a device for the detection of articular forces.
In particular, the invention relates to a device for the detection of articular forces, for measuring the state of stress present in an articulation, such as for example a knee. The device is mini- invasive and reveals the state of mechanical stress present inside the articular capsule of the knee, under different load conditions, in different positions with respect to the thigh-bone and tibia, and under dynamic conditions. From the results of these measurements effected on both compartments (medial and lateral) , information is deduced on the mechanical unbalance condition of the articulation. United States patent US 5,503,162 describes an arthroscopic instrument which evaluates the resistant stress expressed by the cartilage of the knee by means of a mechanical stress system automatically controlled by a computer. In parallel, a force transducer measures the mechanical resistance of the tissue.
The Applicant has observed however that this device is not capable of producing measurements relating to stress transferred between bone-cartilage and even less bone-bone inter-faces. Patent application US2002049382 describes an arthro- scopic device for measuring both the thickness of the cartilage by means of the ultrasound principle and the visco-elastic properties of the cartilage of the meniscus, by means of an integrated force sensor inside the device.
The Applicant has observed that not even this device can be used for measuring stress exerted inside the articulation of the knee.
The state of stress inside the knee is measured through the device proposed in patent US 5,360,016, in which a tibial prosthesis instrumented with force sensors is proposed. It has been observed, however, that this instrument requires an invasive access (total knee prosthesis) for the positioning of the prosthesis on the tibial plate prepared surgically.
Analogously, US patent 6,821,299 describes an implantable knee prosthesis for the in vivo measurement of the three force components and three moment components . Also in this document there are limits of invasive surgi- cal access and its usability only in cases of the production of a prosthesis.
US patent 5,494,045 describes a device for measuring the mechanical resistance of cartilage tissue. The instrument has an elongated form and can be used with the arthroscopic procedure. It is also equipped with mechani- cal stress system and measurement transducer.
The Applicant has observed however that this device is not suitable for measuring typical stress exerted on the overall articulation of the knee. The Applicant is aware of the demand for obtaining a more sophisticated knowledge of articular mechanics, specific for each patient, immediately available in the pre- operating phase or directly in the intra-operating phase with a mini-invasive technique of the arthroscopic inter- vention. The device according to the present invention guarantees the possibility of measuring a wide range of amplitudes of articular stress (0.1N-250N) with a high resolution. This information can be used for improving the quality of the surgical intervention, following pa- thologies or traumas, aimed at restoring the mechanical- physiological conditions. The device can be applied for registering the articular pressure, the contact area and levels of stress before and after the repair intervention of the meniscus cartilage, for verifying the ligament balancing following arthroplastic interventions on the knee with the mini-invasive technique. In addition, it is envisaged that the use of the device proposed can be easily extended to evaluating the state of stress of other articulations such as the shoulder and ankle for both ar- throplasty and ligament surgery. An aspect of the present invention relates to a device for revealing articular forces characterized in that it comprises a hollow rod which contains in its interior an incompressible fluid, at one end of said rod there be- ing a deformable portion sensitive to stress, at the opposite end of the rod with respect to that having the deformable portion, there being at least one pressure sensor suitable for measuring the stress exerted on the deformable portion of the rod itself. The characteristics and advantages of the detection device according to the present invention will appear more evident from the following illustrative and non- limiting description of an embodiment with reference to the enclosed figures in which: - figure 1 schematically illustrates a detection device according to the present invention in an operational position in a patient's knee, communicating with a processing unit;
- figures 2a and 2b schematically illustrate the de- tection device according to the present invention.
With reference to the above figures, the device according to the present invention comprises a hollow rod 2, preferably substantially rigid, of the arthroscopic tube type, made of a biocompatible material, such as for example surgical steel. Said tube is suitable for con- taining an incompressible fluid (for example an aqueous solution at neutral pH, not in direct contact however with the biological structures) . At one end of this tube there is a deformable portion 3 sensitive to stress, for example compression, to be measured. At the opposite end of the tube with respect to that having the deformable portion, there is at least one pressure sensor 4 and an electronic card 5 suitable for receiving and processing the signal of said at least one sensor. The pressure sen- sor measures the stress exerted on the deformable portion, which is transmitted by means of the incompressible liquid present inside the hollow rod to the pressure sensor. Said card, moreover, is capable of translating and transferring (for example in telemetry) the signals to an external electronic processing unit 6.
Operationally, the device is advantageously surgically inserted in the knee, by access through the minimum skin (incision), and introduced inside the articular capsule. Its sensitive end (the flexible portion 3) is posi- tioned between the bone cartilage and the meniscus cartilage in the appropriate measuring seat . In this positioning phase, the surgeon is guided by a classical arthroscopic vision ensured by the use of an arthroscope, inserted inside the knee through a mini-invasive-type ac- cess different from that used for the measuring device proposed.
The state of mechanical stress present deforms the septum and the variation in pressure induced in the fluid inside the rod of the device is transferred towards the other end of the rod (external with respect to the patient) and measured by pressure sensors.
The electronic card guarantees treatment of the signal and transferal towards an external processing or simple display unit. The device can be applied for registering the articular pressure, contact area and levels of stress before and after a repair intervention of the meniscus cartilage, to verify the ligament balance following arthro- plastic operations on the knee with the mini- invasive technique. Furthermore, the device according to the present invention can be easily used for evaluating the state of stress of other articulations such as the shoulder and ankle through both arthroplasty and ligament surgery. The use of various pressure sensors positioned in parallel (i.e. all measuring the same stress transmitted by the liquid in the rod) is advantageous as it increases the reliability of the measurement. Furthermore, the non- compressibility of the liquid ensures that the signal is transferred without any loss towards the opposite end of the tube where the sensors are present .
This device is advantageously equipped with its own supply source for example low voltage (5 V) which feeds both the pressure sensors and the treatment and process- ing circuit of the signal.
Said signal processing can advantageously comprise a signal conversion into digital format which is then transmitted via telemetry to the processing unit in said format .

Claims

1. A device for the detection of articular stress characterized in that it comprises a hollow rod (2) , which contains an incompressible fluid in its interior,
- at one end of said rod there being a deformable portion (3) sensitive to stress,
- at the opposite end of the rod with respect to that having the deformable portion, there being a pressure sensor (4) suitable for measuring the stress exerted on the deformable portion of the rod itself.
2. The device according to claim 1, wherein said hollow rod is substantially a rigid tube.
3. The device according to claim 1, further comprising associated with said at least one pressure sensor, an electronic card (5) suitable for receiving and processing the signal of said at least one sensor.
4. The device according to claim 3, wherein said card is capable of translating and transmitting the signals of the sensors to an external electronic processing unit (6) .
5. The device according to claim 4, wherein said transmission of the signals is transmission in telemetry.
6. The device according to claim 3, wherein said card converts the signal of the sensors into digital format.
7. The device according to claim 1, suitable for being inserted into an articulation in arthroscopy.
8. The device according to claim 7, wherein said articulation is a knee or an ankle.
9. The device according to claim 1, wherein the rod is made of a biocompatible material and the incompressible fluid is an aqueous solution at neutral pH.
10. The device according to claim 1, comprising a series of pressure sensors positioned in parallel with respect to each other.
PCT/IB2008/001011 2007-04-23 2008-04-17 Device for the detection of articular forces WO2008129414A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000844A ITMI20070844A1 (en) 2007-04-23 2007-04-23 DEVICE FOR DETECTION OF ARTICULAR FORCES
ITMI2007A000844 2007-04-23

Publications (2)

Publication Number Publication Date
WO2008129414A2 true WO2008129414A2 (en) 2008-10-30
WO2008129414A3 WO2008129414A3 (en) 2009-05-22

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WO (1) WO2008129414A2 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9549742B2 (en) 2012-05-18 2017-01-24 OrthAlign, Inc. Devices and methods for knee arthroplasty
US9572586B2 (en) 2008-07-24 2017-02-21 OrthAlign, Inc. Systems and methods for joint replacement
US9649160B2 (en) 2012-08-14 2017-05-16 OrthAlign, Inc. Hip replacement navigation system and method
US9775725B2 (en) 2009-07-24 2017-10-03 OrthAlign, Inc. Systems and methods for joint replacement
US9931059B2 (en) 2008-09-10 2018-04-03 OrthAlign, Inc. Hip surgery systems and methods
US10863995B2 (en) 2017-03-14 2020-12-15 OrthAlign, Inc. Soft tissue measurement and balancing systems and methods
US10869771B2 (en) 2009-07-24 2020-12-22 OrthAlign, Inc. Systems and methods for joint replacement
US10918499B2 (en) 2017-03-14 2021-02-16 OrthAlign, Inc. Hip replacement navigation systems and methods
US11020245B2 (en) 2015-02-20 2021-06-01 OrthAlign, Inc. Hip replacement navigation system and method
US11179167B2 (en) 2003-06-09 2021-11-23 OrthAlign, Inc. Surgical orientation system and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040073122A1 (en) * 2002-10-15 2004-04-15 Data Sciences International, Inc. Barriers and methods for pressure measurement catheters
US20050061079A1 (en) * 2003-08-22 2005-03-24 Schulman Joseph H. System and apparatus for sensing pressure in living organisms and inanimate objects

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040073122A1 (en) * 2002-10-15 2004-04-15 Data Sciences International, Inc. Barriers and methods for pressure measurement catheters
US20050061079A1 (en) * 2003-08-22 2005-03-24 Schulman Joseph H. System and apparatus for sensing pressure in living organisms and inanimate objects

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11903597B2 (en) 2003-06-09 2024-02-20 OrthAlign, Inc. Surgical orientation system and method
US11179167B2 (en) 2003-06-09 2021-11-23 OrthAlign, Inc. Surgical orientation system and method
US10206714B2 (en) 2008-07-24 2019-02-19 OrthAlign, Inc. Systems and methods for joint replacement
US11871965B2 (en) 2008-07-24 2024-01-16 OrthAlign, Inc. Systems and methods for joint replacement
US9855075B2 (en) 2008-07-24 2018-01-02 OrthAlign, Inc. Systems and methods for joint replacement
US9572586B2 (en) 2008-07-24 2017-02-21 OrthAlign, Inc. Systems and methods for joint replacement
US11684392B2 (en) 2008-07-24 2023-06-27 OrthAlign, Inc. Systems and methods for joint replacement
US11547451B2 (en) 2008-07-24 2023-01-10 OrthAlign, Inc. Systems and methods for joint replacement
US10864019B2 (en) 2008-07-24 2020-12-15 OrthAlign, Inc. Systems and methods for joint replacement
US9931059B2 (en) 2008-09-10 2018-04-03 OrthAlign, Inc. Hip surgery systems and methods
US10321852B2 (en) 2008-09-10 2019-06-18 OrthAlign, Inc. Hip surgery systems and methods
US11540746B2 (en) 2008-09-10 2023-01-03 OrthAlign, Inc. Hip surgery systems and methods
US11179062B2 (en) 2008-09-10 2021-11-23 OrthAlign, Inc. Hip surgery systems and methods
US11633293B2 (en) 2009-07-24 2023-04-25 OrthAlign, Inc. Systems and methods for joint replacement
US9775725B2 (en) 2009-07-24 2017-10-03 OrthAlign, Inc. Systems and methods for joint replacement
US10869771B2 (en) 2009-07-24 2020-12-22 OrthAlign, Inc. Systems and methods for joint replacement
US10238510B2 (en) 2009-07-24 2019-03-26 OrthAlign, Inc. Systems and methods for joint replacement
US10716580B2 (en) 2012-05-18 2020-07-21 OrthAlign, Inc. Devices and methods for knee arthroplasty
US9549742B2 (en) 2012-05-18 2017-01-24 OrthAlign, Inc. Devices and methods for knee arthroplasty
US11911119B2 (en) 2012-08-14 2024-02-27 OrthAlign, Inc. Hip replacement navigation system and method
US10603115B2 (en) 2012-08-14 2020-03-31 OrthAlign, Inc. Hip replacement navigation system and method
US9649160B2 (en) 2012-08-14 2017-05-16 OrthAlign, Inc. Hip replacement navigation system and method
US11653981B2 (en) 2012-08-14 2023-05-23 OrthAlign, Inc. Hip replacement navigation system and method
US11020245B2 (en) 2015-02-20 2021-06-01 OrthAlign, Inc. Hip replacement navigation system and method
US10863995B2 (en) 2017-03-14 2020-12-15 OrthAlign, Inc. Soft tissue measurement and balancing systems and methods
US11786261B2 (en) 2017-03-14 2023-10-17 OrthAlign, Inc. Soft tissue measurement and balancing systems and methods
US11547580B2 (en) 2017-03-14 2023-01-10 OrthAlign, Inc. Hip replacement navigation systems and methods
US10918499B2 (en) 2017-03-14 2021-02-16 OrthAlign, Inc. Hip replacement navigation systems and methods

Also Published As

Publication number Publication date
WO2008129414A3 (en) 2009-05-22
ITMI20070844A1 (en) 2008-10-24

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