EP0463734A2 - Patientenliegetische - Google Patents

Patientenliegetische Download PDF

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Publication number
EP0463734A2
EP0463734A2 EP91304777A EP91304777A EP0463734A2 EP 0463734 A2 EP0463734 A2 EP 0463734A2 EP 91304777 A EP91304777 A EP 91304777A EP 91304777 A EP91304777 A EP 91304777A EP 0463734 A2 EP0463734 A2 EP 0463734A2
Authority
EP
European Patent Office
Prior art keywords
hydraulic
actuator
flow
fluid
patient support
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.)
Granted
Application number
EP91304777A
Other languages
English (en)
French (fr)
Other versions
EP0463734A3 (en
EP0463734B1 (de
Inventor
Keith Hannant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Smiths Group PLC
Original Assignee
Smiths Group PLC
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 Smiths Group PLC filed Critical Smiths Group PLC
Publication of EP0463734A2 publication Critical patent/EP0463734A2/de
Publication of EP0463734A3 publication Critical patent/EP0463734A3/en
Application granted granted Critical
Publication of EP0463734B1 publication Critical patent/EP0463734B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/02—Adjustable operating tables; Controls therefor

Definitions

  • This invention relates to hydraulic patient support tables including two leaves for supporting different parts along the patient, the leaves being hinged relative to one another and relative to the horizontal, a first hydraulic actuator coupled between one of the leaves and a support to effect change in the angle of the leaf relative to the horizontal, a second hydraulic actuator coupled between the two leaves to effect change in the angle between the two leaves, and an hydraulic supply.
  • Hydraulic patient support table such as surgical operating tables, have several hydraulic actuators which are supplied with hydraulic fluid from a single source which may be electrically or manually powered.
  • One actuator is used to alter the height of the table above the floor.
  • Another actuator is used to alter the longitudinal, elevation angle of the table, so that the patient's head or feet are raised, in what is called Trendelenberg movement.
  • Two further actuators alter, respectively, the lateral, side-to-side, angle or tilt of the table and the break angle of the table at a lateral joint.
  • This latter, break actuator is used to put the table into either an extension mode, where an obtuse angle is formed between the two leaves of the table on its upper surface, or a flexion mode where an acute angle is formed between the two leaves.
  • the break actuator would then be locked and fluid supplied to the Trendelenberg actuator so as to raise the lower trunk leaf.
  • the entire table top will pivot around its joint so that the lower leaf is lowered as the upper leaf is raised.
  • the desired position is achieved by making successive corrections to the break actuator and the Trendelenberg actuator. This procedure is difficult, time consuming and can cause unnecessary movement of the patient. The procedure is especially difficult with manually-powered tables.
  • the patient needs to be moved directly from an extension position into a flexion position and from there into a horizontal position. It can be appreciated that, to achieve these movements, requires repeated actuation of the different actuators and is very difficult to achieve rapidly and smoothly.
  • an hydraulic patient support table of the above-specified kind characterised in that the hydraulic supply, in at least one mode, controls the supply of hydraulic fluid simultaneously to or from both actuators in such a way that when power is supplied to the actuators the angle of both leaves relative to the horizontal changes by substantially the same amount.
  • the hydraulic supply preferably includes a flow control device that controls the flow of fluid to or from one actuator in response to the flow of fluid to or from the other actuator.
  • the flow control device may be a flow divider device coupled to both actuators such that a desired proportion of fluid can be supplied to or from each actuator.
  • the first actuator may have an inlet and outlet connected via respective valves to an inlet and outlet of an hydraulic pump unit.
  • the second hydraulic actuator may have an inlet and outlet connected to an inlet and outlet of an or the hydraulic pump unit and a valve connected between the second actuator and the pump unit.
  • the hydraulic supply may include an hydraulic pump unit connected to one end of the first and second actuators via respective parallel arrangements of two flow lines, one of the flow lines being common to the two actuators and including a flow divider device, and the other of the flow lines connected with each actuator including a respective valve so that flow of fluid to or from both actuators can be confined to flow via the flow divider device by closing the valves in the other flow lines.
  • the common flow line includes a valve which can be closed to prevent flow of fluid through the flow divider.
  • the pump unit may have an inlet and an outlet, one of the inlet and outlet being connected to one end of the first and second actuators via the respective parallel arrangements of two flow lines, and the other of the inlet and outlet of the pump unit being connected to the other end of the first actuator via a valve and to the other end of the second actuator without the interposition of a valve.
  • the pump unit may be reversible.
  • the hydraulic supply preferably locks the table in position when the supply of hydraulic fluid stops.
  • the surgical operation table has a top 1 supported at the upper end of an hydraulic actuator or ram 2 within a support column 3 on a base 4.
  • the height of the table top 1 relative to the base 4 is controlled by hydraulic fluid pumped into the ram 2 by an hydraulic power supply 5.
  • the top 1 is divided across its longitudinal axis into two leaves 7 and 8 which support the upper trunk and lower trunk respectively of the patient.
  • the two leaves 7 and 8 are hinged relative to one another and to the upper end of the ram 2 about a horizontal, lateral axis by a joint 9.
  • a second joint 10 ( Figure 2) hinges the entire table top 1 about a longitudinal axis so that the table top can the tilted laterally.
  • the table has three further hydraulic actuators 11, 12 and 13 in addition to the hydraulic ram 2.
  • a lateral actuator 11 ( Figure 2) which is coupled between one side of the table top 1 and the table support column 3 so that, by controlling fluid supply to the actuator, the lateral tilt of the table top 1 can be altered.
  • Another actuator 12 ( Figure 1) is coupled between the upper trunk leaf 7 and the support column 3 which enables the elevation angle of the top to be altered; this longitudinal tilting movement is known as Trendelenberg movement.
  • the third actuator 13 ( Figure 1) is coupled between the two leaves 7 and 8 and enables the angle between the two leaves to be changed; this actuator is referred to as the break actuator.
  • the hydraulic control system 5 includes an electrical pump unit 50 with an inlet line 51 and an outlet line 52.
  • the pump unit 50 can be operated in a reverse sense so that the inlet line 51 can serve as an outlet line and the outlet line 52 as an inlet.
  • the outlet line 52 is connected to the inlet of the Trendelenberg actuator 12, via a first solenoid-controlled valve 53 in a fluid line 43, and to the inlet of the break actuator 13, via a second solenoid-controlled valve 54 in a fluid line 44.
  • the outlet line 52 is also connected to a flow divider 55 via a third solenoid-controlled valve 56 in a fluid line 46.
  • the flow divider 55 is of "Y" configuration with its common arm connected to the valve 56, one lateral arm connected intermediate the valve 53 and the input of the Trendelenberg actuator 12, and the other lateral arm connected intermediate the valve 54 and the input of the break actuator 13.
  • Connection of the pump 50 to the inlet of the actuator 13 is, therefore, via a parallel arrangement of lines 44 and 46, whereas connection of the pump to the inlet of the actuator 12 is via a parallel arrangement of lines 43 and 46.
  • the fluid line 46 is common to both connections between the pump 50 and the inlets of the two actuators 12 and 13.
  • the input line 51 of the pump unit 50 is connected directly to the output of the break actuator 13 without the interposition of any valve and is connected to the output of the Trendelenberg actuator 12 via a fourth solenoid-controlled valve 57.
  • Trendelenberg motion in which the lower trunk end of the table 1 is raised whilst the upper end is lowered, is achieved by putting the first valve 53 and the fourth valve 57 in an open position (1) and by pumping fluid out of the unit 50 in a forward direction (F) into the outlet line 52. Fluid flows into the inlet of the Trendelenberg actuator 12 via the valve 53 and out of the outlet of the actuator, via valve 57 and the inlet line 51 back to the pump unit 50. This causes the actuator to contract.
  • the second valve 54 remains closed (O) so that fluid is prevented from flowing to or from the break actuator 13.
  • the third valve 56 is also closed (O) so that fluid cannot flow out of the flow divider 55. Because the break actuator 13 is locked, there is no relative movement between the two leaves 7 and 8.
  • a "break up” motion can also be produced in which the lower trunk leaf 8 is raised and the upper trunk leaf 7 remains horizontal, Figure 4C. This is achieved with the pump unit 50 in reverse (R), with the second valve 54 open (1) and with the other valves 53, 56 and 57 closed (O). Fluid flows to the outlet of the actuator 13 causing it to extend, whilst fluid returns to the pump unit 50 via the open valve 54. The upper trunk leaf 7 will be locked in position by the Trendelenberg actuator 12 so that only the lower leaf 8 moves upwardly, in an anti-clockwise sense about the joint 9.
  • a "break down" motion is achieved with the valves in the same setting as for break up, but with the pump unit 50 running in its forward sense (F). Fluid will flow from the pump unit 50 via outlet line 52 to the inlet of the actuator 13, thereby causing contraction and lowering of the lower trunk leaf 8.
  • the flow divider 55 is so arranged that the flows from the two actuators 12 and 13 are balanced to produce equal angular rates of movement of the two leaves 7 and 8. Without the flow divider, or some equivalent arrangement, fluid would flow preferentially to the actuator which presents less resistance. Fluid flows from the flow divider 55, via the third valve 56 to the outlet line 52 of the pump unit 50.
  • the table of the present invention enables the table top 1 to be put into an extension or flexion configuration directly from a horizontal configuration without successive different movements. Also, the table top can be moved directly from an extension configuration to a flexion configuration smoothly as a continuous action.
  • the hydraulic circuit is preferably arranged so that, when the pump unit 50 is off, no hydraulic fluid can flow around the circuit. This effectively locks the table in position.
  • the table top could have a greater number of leaves for supporting different parts of the body and which are articulated with respect to one another.
  • the hydraulic control system is only described schematically above and it may take various different forms.
  • the hydraulic system may be manually powered rather than electrically powered, if desired. The user would not generally need to switch the individual valves independently, this would be achieved automatically by actuation of a single button or the like marked “Trendelenberg”, “Reverse Trendelenberg” and so on.
  • the invention is not confined to surgical tables but could be used in other patient support tables.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
EP19910304777 1990-06-28 1991-05-28 Patientenliegetische Expired - Lifetime EP0463734B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9014369 1990-06-28
GB909014369A GB9014369D0 (en) 1990-06-28 1990-06-28 Patient support tables

Publications (3)

Publication Number Publication Date
EP0463734A2 true EP0463734A2 (de) 1992-01-02
EP0463734A3 EP0463734A3 (en) 1992-03-11
EP0463734B1 EP0463734B1 (de) 1994-09-07

Family

ID=10678342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910304777 Expired - Lifetime EP0463734B1 (de) 1990-06-28 1991-05-28 Patientenliegetische

Country Status (3)

Country Link
EP (1) EP0463734B1 (de)
DE (1) DE69103824T2 (de)
GB (2) GB9014369D0 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009073027A1 (en) * 2007-12-05 2009-06-11 Dental Equipment, Llc, Dba Pelton & Crane Dental chair with improved patient positioning
WO2016041115A1 (zh) * 2014-09-15 2016-03-24 南京迈瑞生物医疗电子有限公司 手术台液压驱动系统
CN107806452A (zh) * 2016-09-19 2018-03-16 成都测迪森生物科技有限公司 一种手术台液压系统的控制方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9121217D0 (en) * 1991-10-05 1991-11-20 Smiths Industries Plc Patient support tables
DE102011108347B4 (de) * 2011-07-25 2019-03-28 medifa GmbH & Co. KG Operationstisch

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB485820A (en) * 1936-07-17 1938-05-25 Schaerer Ag M Operating table
FR2287897A1 (fr) * 1974-10-17 1976-05-14 Chretien Rene Table articulee commandee electriquement
DE3016387A1 (de) * 1980-04-29 1981-11-05 Herbert 8190 Wolfratshausen Brustmann Vollhydraulische elektrisch gesteuerte massage- oder behandlungsliege
US4865303A (en) * 1987-11-23 1989-09-12 American Sterilizer Company Operating table

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB485820A (en) * 1936-07-17 1938-05-25 Schaerer Ag M Operating table
FR2287897A1 (fr) * 1974-10-17 1976-05-14 Chretien Rene Table articulee commandee electriquement
DE3016387A1 (de) * 1980-04-29 1981-11-05 Herbert 8190 Wolfratshausen Brustmann Vollhydraulische elektrisch gesteuerte massage- oder behandlungsliege
US4865303A (en) * 1987-11-23 1989-09-12 American Sterilizer Company Operating table

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009073027A1 (en) * 2007-12-05 2009-06-11 Dental Equipment, Llc, Dba Pelton & Crane Dental chair with improved patient positioning
WO2016041115A1 (zh) * 2014-09-15 2016-03-24 南京迈瑞生物医疗电子有限公司 手术台液压驱动系统
CN106659627A (zh) * 2014-09-15 2017-05-10 南京迈瑞生物医疗电子有限公司 手术台液压驱动系统
US10323658B2 (en) 2014-09-15 2019-06-18 Nanjing Mindray Bio-Medical Electronics Co., Ltd. Hydraulic drive system for operation table
CN106659627B (zh) * 2014-09-15 2019-09-03 南京迈瑞生物医疗电子有限公司 手术台液压驱动系统
CN107806452A (zh) * 2016-09-19 2018-03-16 成都测迪森生物科技有限公司 一种手术台液压系统的控制方法

Also Published As

Publication number Publication date
EP0463734A3 (en) 1992-03-11
GB2245486A (en) 1992-01-08
GB9112046D0 (en) 1991-07-24
DE69103824T2 (de) 1995-01-05
GB9014369D0 (en) 1990-08-22
GB2245486B (en) 1993-04-21
EP0463734B1 (de) 1994-09-07
DE69103824D1 (de) 1994-10-13

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