WO1988000452A1 - Lit medical d'examen pour appareil de rmn ou de tomodensitometrie - Google Patents
Lit medical d'examen pour appareil de rmn ou de tomodensitometrie Download PDFInfo
- Publication number
- WO1988000452A1 WO1988000452A1 PCT/FR1987/000279 FR8700279W WO8800452A1 WO 1988000452 A1 WO1988000452 A1 WO 1988000452A1 FR 8700279 W FR8700279 W FR 8700279W WO 8800452 A1 WO8800452 A1 WO 8800452A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plate
- bed according
- arm
- relative
- chassis
- Prior art date
Links
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 238000002591 computed tomography Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 230000001419 dependent effect Effects 0.000 claims 1
- 230000005484 gravity Effects 0.000 claims 1
- 239000007769 metal material Substances 0.000 claims 1
- 238000005481 NMR spectroscopy Methods 0.000 description 7
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010073 coating (rubber) Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000036449 good health Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/04—Positioning of patients; Tiltable beds or the like
- A61B6/0487—Motor-assisted positioning
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
Definitions
- the subject of the present invention is a. medical examination bed, in particular for a nuclear magnetic resonance (NMR) or computed tomography device. It mainly finds its application in the medical field where it is known to subject patients in the supine position to non-invasive examinations with such machines.
- NMR nuclear magnetic resonance
- computed tomography device mainly finds its application in the medical field where it is known to subject patients in the supine position to non-invasive examinations with such machines.
- the object of the present invention is to remedy the aforementioned drawbacks by proposing beds, the plate and the drive means of which include means to facilitate the handling of the patient.
- the tray On the one hand, the tray has been made removable to allow emergency withdrawals. This quality cannot be
- the removable nature of the tray makes it possible to reduce the cost of the equipment to be built: it suffices to build a bed frame and several removable trays, placed in turn on the bed frame, to be able to be introduced into the machine. As a result, preparing patients for the exam no longer requires immobilizing the bed let alone the exam apparatus.
- the movement of the plate relative to the frame of the bed in order to be able to be introduced into the device is effected by means of an auxiliary arm, called a differential, of length close to the length of the plate and / or of the frame. (2 meters). One end of this arm drives the plate while the other rests on the chassis. This separates the tray function, actual patient support, from the mean function of moving the tray (over a distance greater than its useful length). As a result, the examination bed according to the invention regains a conventional length adapted to its conveying in hospital corridors.
- the subject of the present invention is a medical examination bed, in particular for an NMR or computed tomography apparatus comprising a chassis, an examination plate, and drive means for moving the plate relative to its frame, and relative to the device characterized in that it comprises means for making the tray removable.
- FIG. 3 a dif erential arm for maneuvering the platform
- FIG. 4 a perspective view of the guide path of the plate in its frame and in the device.
- FIG. 1 shows schematically in section an examination bed according to the invention.
- An NMR device or a tomodensitometer 1 is provided to receive, substantially along its axis Insertion 2, the body of a patient (not shown) supported by an examination bed 3 according to the invention.
- This examination Ut comprises a chassis 4, a plate 5, and drive means 6 for moving the plate relative to the chassis and relative to the device.
- the drive means 6 comprise a mobile device of elongated shape.
- This movable assembly comprises an arm 7, one end 8 of which is movable relative to the chassis and the other end of which 9 is movable relative to the plate.
- each point of the plate can move relative to any point on the chassis with a length equal to the sum of the useful stroke 10 of the end 8 relative to the chassis and the useful stroke 11 of the end 9 relative to the plate.
- the arm has for ef and to offset the two extreme positions of the plate relative to the center of the frame.
- the plate In the representation of Figure 1 the plate is in an extreme position suitable for -preparation for insertion into the machine. In the other extreme position, the plate 5 is completely advanced in the machine 1, and the rear end 12 of the plate can be distant Q from the front end 13 of the chassis by a distance substantially equal to the length of the arm 7.
- the moving assembly 6 comprises two toothed wheels 14 and 15 rotating on shafts secured to the ends respectively of 8 and 9 of the arm.
- the toothed wheel 14 takes 5 presses on a rack 16 secured to the chassis while the wheel
- the movement transformation ratio can be adapted by varying the diameter of the wheels 14 or 15 and / or the diameter of the pinions 18 and 19 secured to these wheels. In a preferred embodiment, the transformation ratio is equal to 1.
- the displacement could be obtained by other means. For example, it would be possible to produce the moving element 6 with a triple cylinder, that is to say with at least 3 nested rods. A first rod would have one end fixed to the plate, and a third, external rod, would have one end, that opposite to the end of the first rod, fixed to the chassis.
- the second rod is the movable assembly and as having a first end which can be moved relative to the plate and a second end which can be moved with respect to the chassis.
- This hydraulic bolt solution can be replaced by an equivalent screw solution with at least three screws nested one inside the other.
- the intermediate elements Apart from the end elements, the intermediate elements, bolts or screws, constitute the mobile assembly.
- the mobile assembly When the intermediate elements are unique, the mobile assembly is rigid and non-deformable. It corresponds to a rigid bar 7. If the intermediate elements are more numerous, for example if they comprise at least two nested rods, the length of the intermediate element can be variable. In all cases, the invention also provides the advantage of making it possible to approach the chassis 4 of the device 1, leaving between these two parts a gap 24 which can be used for any operation of preparing the patient before being introduced into the machine.
- FIG. 1 shows the plate 5 now a rack ⁇ ⁇ drive 17 on which comes to mesh the moving element 6 to move the plate.
- the rack held in longitudinal displacement by the two stops 22 and 23 integral with the plate, can however undergo a vertical movement of retraction, of disengagement, tending to raise it. In this way the teeth of the wheel 15 of
- the moving element escapes from the notches of the rack 17.
- the disengaging movement is obtained by means of a cam plate 25 which maintains, in notches in the general shape of a V such as 26 and 27, shafts support, respec ⁇ tively 28 and 29, of the rack 17.
- a cam plate 25 which maintains, in notches in the general shape of a V such as 26 and 27, shafts support, respec ⁇ tively 28 and 29, of the rack 17.
- the plate 25 moves to the right or to the left, and drives the shafts 28 and 29 in an upward movement. Under these conditions the rack rises and escapes from the teeth of the wheel 15. By doing so we have disengaged the means for moving the plate 5. It is then possible to slide this plate on its support means.
- this handle is approached by another handle, respectively 34 or 35, secured to the plate which has a longitudinal offset whose value is substantially equal to the useful length of movement of the plate 25 relative to the plate.
- FIGS. 2 to 4 show a particular example of the realization of the plate 5, of the movable assembly 6, and of the chassis 4.
- the examination bed according to the invention should be supplemented with measurement means 36 of the position of the end 8 of the movable assembly 6 relative to the chassis 4.
- the means 36 may include a tachometer generator or resolvers mounted on the pinion shaft 18.
- the chassis is designed to be placed at a space predetermined 24 of the apparatus 1, and as the plate is in the normal position for transporting the bed to an extreme predetermined location relative to the chassis, it is possible to know by counting the number of revolutions made by the wheel 14, or the pinion 18, where is any section of the pan in the machine when it is advanced there.
- This arrangement offers the advantage of allowing very tolerant positioning of the plate 5 in the machine. Ultimately, the conditions of alignment of the plate 5 with the machine are no longer critical even for the measurement of penetration into the machine.
- This allows the construction of a plate of trapezoidal cross section (FIG. 2), intended to slide on guides of corresponding shape in the apparatus and in the chassis (FIG. 4).
- the device and the chassis preferably have support areas 37-38 and 39-40 respectively for receiving support rollers such as 41-42 (FIG. 2) of the plate 5.
- these rollers are made of fibers of epoxy glass and are coated with rubber. This gives flexibility to the support and avoids subjecting the patient to unpleasant tremors.
- these include inclined planes 43-44 and 45-46 respectively on which come to bear rollers such as 47 of the tray 5.
- the angle of inclination of the inclined planes is of the order of 30 °. It is a compromise between a guiding efficiency to be obtained, and limits of loosening of the rubber coatings of the glass rollers.
- the tray may further include side handles such as 48 to 51 regularly distributed on each side along the panel.
- the rack release device is slightly different.
- the rack 17 is embedded in a groove 51 inside the plate. It is inserted between the two stops, including the visible stop 23, integral with the plate.
- the handle 31 is provided for longitudinally moving the two plates 25 and 52 at the same time.
- the device for guiding the plates relative to the plate 5 is modified.
- the plates are each provided at their lower edge with a shoe such as 53 to take support under the plate 5 and thus play the same role as the pins 33 in the windows 32.
- the cams 26 and 27 have flats on the edges and in the center of the V to constitute situations of rest of the lifting effort and holding the rack 17. Therefore the low and high positions of the rack are mechanically stable.
- the central flat part of the cams for example the flat part 54, is intended to exert a pressure from top to bottom on the support shafts, for example the shaft 55, of the rack so as to avoid, since the weight of this
- the movable assembly comprises the arm 7 in which the toothed wheels 14 and 15 can move at each of the ends.
- the arm 7 has the shape of a box provided with two windows, for example window 57, to allow the teeth of the wheels 14 or 15 to protrude outside the respectively lower 58 and upper 59 surface of the
- the arm further has a front roller 60 to allow its support in the machine 1 when it is engaged.
- the entry edge of the machine has a chamfer 61 (FIGS. 1 and 4) to receive this roller and allow the insertion of the arm into a groove 62 formed in the tunnel of the machine.
- the arm rests on the one hand on the rack 16 by its toothed wheel 14 on the other hand in the groove 62 by the roller 60.
- a diabolo 63 intended to take support under the box 7 while the head 9 of the arm 7 crosses the space 24.
- the conical ends 0 64 and 65 of the diabolo 63 authorize misalignments between the chassis 4 and the apparatus 1.
- the influence of the diabolo decreasing as the arm enters the machine it is planned to provide the lateral edges of the arm 7 with pads such as 66 or 67, preferably made of polytetrafluoroethylene, to take supports on the vertical edges of the grooves of the chassis 4 and of the machine 1.
- the overall height of the arm is calculated so that this arm can find its exact place in the grooves 51 and 61, or between the racks 16 and 17, without exerting any support effort on the platform.
- the bed and / or the frame of the invention can also be provided with all the ancillary devices mentioned above.
- the bed is adjustable in height to suit all kinds of machines and facilitate the loading of a non-bedridden patient by allowing him to sit on the tray (close to the ground).
- the raising of the bed is caused by the rotation of the legs of an X.
- the gap 24 between the bed and the machine varies according to the height position of the bed in order to facilitate even more, in the low position, the passage of the operator.
- the bed undergoes a rotational movement to reduce the distance which separates it from the machine.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Biophysics (AREA)
- Biomedical Technology (AREA)
- Radiology & Medical Imaging (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Pathology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Optics & Photonics (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR86/10476 | 1986-07-18 | ||
FR8610476A FR2601580A1 (fr) | 1986-07-18 | 1986-07-18 | Lit medical d'examen, notamment pour appareil de rmn ou de tomodensitometrie. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1988000452A1 true WO1988000452A1 (fr) | 1988-01-28 |
Family
ID=9337554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1987/000279 WO1988000452A1 (fr) | 1986-07-18 | 1987-07-10 | Lit medical d'examen pour appareil de rmn ou de tomodensitometrie |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0316321A1 (fr) |
JP (1) | JPH01503202A (fr) |
FR (1) | FR2601580A1 (fr) |
WO (1) | WO1988000452A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108618898A (zh) * | 2017-03-24 | 2018-10-09 | 康姿百德集团有限公司 | 一种辅助检查医疗床 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5196763B2 (ja) * | 2006-11-14 | 2013-05-15 | 株式会社東芝 | 寝台装置および医用画像診断装置 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1273267A (fr) * | 1960-10-07 | 1961-10-06 | Chirana Praha Np | Table pour l'observation aux rayons chi |
FR1436619A (fr) * | 1965-02-04 | 1966-04-29 | Perfectionnement aux appareils radiographiques | |
US4131802A (en) * | 1976-06-28 | 1978-12-26 | Ohio-Nuclear, Inc. | Automatic patient table having means for transporting patient along a table |
EP0135161A2 (fr) * | 1983-08-19 | 1985-03-27 | Kabushiki Kaisha Toshiba | Dispositif pour soulever un support pour patient associé à un appareil de tomographie à ordinateur |
GB2151992A (en) * | 1983-12-12 | 1985-07-31 | Gen Electric | Patient transfer cradle |
US4567894A (en) * | 1984-11-09 | 1986-02-04 | General Electric Company | Hydraulically operated, mobile patient transport table useful with a magnetic resonance scanner |
EP0197827A1 (fr) * | 1985-03-22 | 1986-10-15 | General Electric Cgr S.A. | Table d'examen à guidage linéaire d'un panneau d'examen |
EP0200374A2 (fr) * | 1985-04-12 | 1986-11-05 | Picker International, Inc. | Imagerie par absorption |
-
1986
- 1986-07-18 FR FR8610476A patent/FR2601580A1/fr not_active Withdrawn
-
1987
- 1987-07-10 WO PCT/FR1987/000279 patent/WO1988000452A1/fr not_active Application Discontinuation
- 1987-07-10 EP EP87904693A patent/EP0316321A1/fr not_active Ceased
- 1987-07-10 JP JP62504349A patent/JPH01503202A/ja active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1273267A (fr) * | 1960-10-07 | 1961-10-06 | Chirana Praha Np | Table pour l'observation aux rayons chi |
FR1436619A (fr) * | 1965-02-04 | 1966-04-29 | Perfectionnement aux appareils radiographiques | |
US4131802A (en) * | 1976-06-28 | 1978-12-26 | Ohio-Nuclear, Inc. | Automatic patient table having means for transporting patient along a table |
EP0135161A2 (fr) * | 1983-08-19 | 1985-03-27 | Kabushiki Kaisha Toshiba | Dispositif pour soulever un support pour patient associé à un appareil de tomographie à ordinateur |
GB2151992A (en) * | 1983-12-12 | 1985-07-31 | Gen Electric | Patient transfer cradle |
US4567894A (en) * | 1984-11-09 | 1986-02-04 | General Electric Company | Hydraulically operated, mobile patient transport table useful with a magnetic resonance scanner |
EP0197827A1 (fr) * | 1985-03-22 | 1986-10-15 | General Electric Cgr S.A. | Table d'examen à guidage linéaire d'un panneau d'examen |
EP0200374A2 (fr) * | 1985-04-12 | 1986-11-05 | Picker International, Inc. | Imagerie par absorption |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108618898A (zh) * | 2017-03-24 | 2018-10-09 | 康姿百德集团有限公司 | 一种辅助检查医疗床 |
Also Published As
Publication number | Publication date |
---|---|
JPH01503202A (ja) | 1989-11-02 |
FR2601580A1 (fr) | 1988-01-22 |
EP0316321A1 (fr) | 1989-05-24 |
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