US20090060764A1 - Medical Pump - Google Patents

Medical Pump Download PDF

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Publication number
US20090060764A1
US20090060764A1 US11/630,613 US63061305A US2009060764A1 US 20090060764 A1 US20090060764 A1 US 20090060764A1 US 63061305 A US63061305 A US 63061305A US 2009060764 A1 US2009060764 A1 US 2009060764A1
Authority
US
United States
Prior art keywords
medical pump
pump according
fluid
pressure
fluid outlet
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.)
Abandoned
Application number
US11/630,613
Other languages
English (en)
Inventor
Lothar Mitzlaff
Ralf Kuehner
Martin Hagg
Jochen Queck
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.)
Erbe Elecktromedizin GmbH
Original Assignee
Erbe Elecktromedizin GmbH
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 Erbe Elecktromedizin GmbH filed Critical Erbe Elecktromedizin GmbH
Assigned to ERBE ELEKTROMEDIZIN GMBH reassignment ERBE ELEKTROMEDIZIN GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: QUECK, JOCHEN, HAGG, MARTIN, MITZLAFF, LOTHAR, KUEHNER, RALF
Publication of US20090060764A1 publication Critical patent/US20090060764A1/en
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/32—Surgical cutting instruments
    • A61B17/3203—Fluid jet cutting instruments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/02—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having two cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/03—Stopping, starting, unloading or idling control by means of valves
    • F04B49/035—Bypassing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/007—Cylinder heads

Definitions

  • the invention relates to a medical pump, in particular for water jet surgery.
  • a further problem of water jet surgery is that the cutting medium must be totally sterile (e.g. Ringer solution) as the liquid comes into contact with body tissue in the closest and most intensive way possible. Ordinary problems such as high reliability, simplicity and economic manufacture must also be considered.
  • sterile e.g. Ringer solution
  • the invention provides a medical pump, in particular for water jet surgery, which despite simple construction and suitability for single use facilitates improved cutting performance.
  • a medical pump comprises at least two pistons with piston rods for displacing the pistons in the cylinders and for coupling to a pump actuation device, a cylinder head for closing the cylinders in relation to the pistons, valve means for connecting the pressure chamber with at least one fluid outlet and at least one fluid inlet, whereby the fluid outlet interacts with the fluid inlet via an adjustable pressure control valve in such a way that the pressure in the fluid outlet can be limited to a predetermined maximum value.
  • valve means and/or the pressure control valve comprise an elastic or elastically pressurized valve membrane. This enables very economic manufacture and high operational safety.
  • the valve devices can also comprise two spring-loaded ball check valves, which again are simple to produce.
  • the pressure control valve is preferably constructed as a power driven valve in such a way that the maximum value is adjustable by means of actuating power on a regulator of the pressure control valve.
  • This special form facilitates coupling of the medical pump to the pump actuation device in an advantageous manner, where a particular specific spatial positioning of the pump in relation to the pump actuation device is not required. Because the pressure adjustment is not proportional to the travel but proportional to the force, coupling of the pressure control valve to a regulating unit is not position-dependent (which would require accurate adjustment of the pump), it is rather the position independent force with which the regulator activates the pressure control valve which is important.
  • the pressure control valve is preferably arranged between fluid inlet and fluid outlet in such a way, that on exceeding the maximum value, fluid from the fluid outlet can be directed back to the fluid inlet. In this way the pressure can be adjusted independently of the quantity of pumped fluid.
  • the pistons or pistons rods are preferably connected securely and in a sterile way via bellows, cup seal or similar non-slip seals to the cylinders. Germs can thus not be introduced despite sterile working fluid and sterile transmission pipes, which can be the case with pumps known hitherto. This danger is particularly great as due to piston displacement in the cylinders their back ends (in relation to the pressure chambers) are subjected to streams of ambient air and thus cylinders can be contaminated therewith in this area.
  • valve devices and/or pressure control valve are preferably housed in the cylinder head. This results in a simpler setup containing fewer parts.
  • cylinders are connected independently to the cylinder head. This simplifies manufacture.
  • the outlet preferably has fittings for irreversible connection to a pressure hose. This avoids a faulty installation of the pump and also non-permissible re-use of the pump.
  • the cylinder head preferably comprises holding devices, in particular lugs into which the catches engage, which are attached to the pump actuation device. No special measures are thus needed for mounting the pump to the pump actuation device.
  • An accumulator is provided in a preferred embodiment and is connected to the fluid outlet in such a way that fluid pressure fluctuations at the fluid outlet are smoothed out due to a low pass function. This results in a further smoothing of the cutting jet and thus an improvement of the equipment cutting function desired.
  • the accumulators are preferably situated in the cylinder head or connected therewith which simplifies the assembly of the entire arrangement.
  • FIGS. 1 to 3 are schematic block diagrams of different embodiments of the medical pump arrangements according to the invention.
  • FIG. 4 is an exploded view of an embodiment of the pump.
  • FIG. 5 is a side view of the pump shown in FIG. 4 .
  • FIG. 6 is a section along line VI-VI in FIG. 5 .
  • FIGS. 7 and 8 are partial sectional views through the medical pump in the pressure control valve area in two respective control positions.
  • FIG. 9 is a perspective view of a cylinder head of the pump.
  • a pump actuation device 10 is intended for the embodiment of the invention shown in FIG. 1 , which encompasses a motor control 15 for the control of two motors 11 , 11 ′, which are connected via gearing 12 , 12 ′ and clutch devices 13 , 13 ′ to the piston rods 25 , 25 ′.
  • One operator B can operate the motor control 15 with suitable switches (foot switch or finger switch), so that the motors 11 , 11 ′ displace the piston rods 25 , 25 ′ and thus the pistons 22 , 22 ′ in the cylinders 21 , 21 ′ of pump unit 20 alternately via the described train, so that the volume of the pressure chambers 16 , 16 ′ of the pump unit 20 is alternately enlarged and reduced.
  • seals 23 , 23 ′ are provided at the pistons 22 , 22 ′.
  • the piston rods 25 , 25 ′ maintain sterility with cup seals 24 , 24 ′, which are firmly fixed to the cylinders 21 , 21 ′ on the one hand and to the pistons rods 25 , 25 ′ on the other. In this way germs from the ambient air, which without these cup seals 24 , 24 ′ would settle on the internal walls of the cylinders 21 , 21 ′ and pass through the seals 23 , 23 ′, can neither mix with the working fluid nor find their way into the same.
  • Suction valves 26 , 26 ′ as well as pressure valves 27 , 27 ′ are connected to the pressure chambers 16 , 16 ′.
  • the suction valves 26 , 26 ′ are connected via a fluid inlet 6 to a reservoir 9 for the working fluid.
  • the pressure valves 27 , 27 ′ are connected to the pressure hose 5 via a fluid outlet 7 , which leads to an applicator 8 .
  • the pump unit 20 forms a disposable part E together with the reservoir 9 including its contents, pressure hose 5 and applicator 8 , which is disposed of after each operation, so that the entire setup meets the highest sterility requirements possible.
  • a butterfly valve 14 is intended for adjustment of pressure in this simple embodiment of the invention (which in addition to the motor control 15 ) facilitates adjustment of the fluid flow by operator B.
  • FIG. 2 differs from that in FIG. 1 by virtue of the provision of a pressure control valve 35 , which with the aid of a valve membrane 36 can open and close a connecting channel between fluid outlet 7 and fluid inlet 6 .
  • the membrane 36 is operated by an actuator 30 via a push rod 34 and a spring 33 , as well as a dynamometer 31 .
  • the dynamometer 31 supplies a power proportional output signal to a controller 32 , via which an operator B can set a maximum pressure.
  • the operating current of the actuator 30 can also be measured which is also power proportional.
  • This arrangement means that the fluid pressure can be accurately adjusted at the applicator 8 . Moreover, pressure fluctuations resulting from piston operation are smoothed out by the control valve 35 .
  • the pressure control valve 35 owing to its construction operates with the membrane pressurised by fluid, in a power-controlled and not a travel-controlled manner. No pressure adjustment error can therefore occur even with dimension tolerances during coupling of the pump unit 20 to the pump actuation device 10 , as it is not the geometric dimensions (travel) which are important, but the power with which the pressure control valve 35 is operated.
  • FIG. 3 differs from the previously shown embodiments by virtue of the provision of an accumulator 40 , which comprises a cylinder 44 containing a piston 42 sealed by a seal 43 , which is pressurized by a spring 41 .
  • a chamber situated above the piston is connected to the fluid outlet, so that with increasing pressure at the fluid outlet 7 the spring 41 is compressed and with decreasing pressure the spring 41 drives the piston 42 . In this way the pressure directed to the applicator 8 is smoothed out due to its low pass function.
  • This accumulator 40 is arranged in a cylinder head 29 which seals the cylinders 21 , 21 ′. It is also possible to combine the variants show here. In particular the pressure control valve 35 can be combined with the accumulator 40 .
  • FIG. 4 shows a constructive embodiment of the pump device 20 in an exploded view.
  • the pressure and suction valves 26 / 27 comprise balls 19 , which are pressed onto the valve seats via springs 18 (not visible in the illustration), in an arrangement that is known in principle.
  • the cylinder head 29 has two sections to which the cylinders 21 , 21 ′ are coupled, whereby the valves sit between the cylinders 21 , 21 ′ and the cylinder head 29 .
  • piston rods 25 , 25 ′ have coupling projections 17 , 17 ′ at their distal ends which serve to create mechanical connections with the coupling systems 13 , 13 ′.
  • the pistons in this embodiment of the invention are formed by the proximal ends of the piston rods 25 , 25 ′ fitted with caps 28 , which simultaneously hold seals 23 , 23 ′ firmly on the piston rods 25 , 25 ′.
  • the pressure hose 5 is fastened irreversibly to the cylinder head 29 via a connecting piece 37 , a crimping piece 38 and an internal pipe which is inserted into the pressure hose 5 , whereby after assembly of the connecting piece 37 (in a known way) in the cylinder head 29 by means of a catch 45 , the connecting piece is held irreversibly in the cylinder head 29 .
  • FIGS. 7 and 8 show a section through the pressure control valve 35 , which shows that the membrane 36 can be pressed by the push rod 34 onto a valve seat ( FIG. 7 shows the open position and FIG. 8 the closed), so that between fluid outlet 7 and fluid inlet 6 , depending on the position of the membrane 36 , a more or less greater “short circuit” of the pump unit 20 is produced.
  • a power-controlled valve is present as the membrane 36 is pressurized by the fluid outlet 7 , a power-controlled valve is present.
  • FIG. 4 shows further construction related details of the cylinder head 29 and the valve devices (suction valve, pressure valve and pressure control valve) contained therein.
  • FIG. 9 shows the lugs, which are coupled via the pump unit 20 to the pump actuation device 10 or they can be held firmly on the same.
  • the pressure control valve 35 a membrane valve, but also the two pressure valves 27 , 27 ′ or suction valves 26 , 26 ′ are designed as membrane valves instead of the ball valves shown here. This makes the arrangement even more economic. Finally, it is also possible to create the pump in such a way that not only are all the valves membrane valves but all the membranes are connected in one piece, so that the number of components is decreased still further.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
US11/630,613 2004-06-30 2005-06-22 Medical Pump Abandoned US20090060764A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004031673.2 2004-06-30
DE102004031673A DE102004031673B4 (de) 2004-06-30 2004-06-30 Medizinische Pumpe
PCT/EP2005/006755 WO2006002817A1 (de) 2004-06-30 2005-06-22 Medizinische pumpe

Publications (1)

Publication Number Publication Date
US20090060764A1 true US20090060764A1 (en) 2009-03-05

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Family Applications (1)

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US11/630,613 Abandoned US20090060764A1 (en) 2004-06-30 2005-06-22 Medical Pump

Country Status (7)

Country Link
US (1) US20090060764A1 (enrdf_load_stackoverflow)
EP (1) EP1768580B1 (enrdf_load_stackoverflow)
JP (1) JP4925213B2 (enrdf_load_stackoverflow)
CN (1) CN100534395C (enrdf_load_stackoverflow)
AU (1) AU2005259594B2 (enrdf_load_stackoverflow)
DE (1) DE102004031673B4 (enrdf_load_stackoverflow)
WO (1) WO2006002817A1 (enrdf_load_stackoverflow)

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US20090227998A1 (en) * 2008-03-06 2009-09-10 Aquabeam Llc Tissue ablation and cautery with optical energy carried in fluid stream
US20110150680A1 (en) * 2009-12-22 2011-06-23 Smith & Nephew, Inc. Disposable Pumping System and Coupler
WO2011097505A1 (en) 2010-02-04 2011-08-11 Procept Corporation Multi fluid tissue resection methods and devices
US20140127037A1 (en) * 2012-11-07 2014-05-08 Seiko Epson Corporation Fluid supply apparatus
EP2730240A1 (en) * 2012-11-12 2014-05-14 Seiko Epson Corporation Liquid supply apparatus
US20150273137A1 (en) * 2007-12-10 2015-10-01 Bayer Medical Care Inc Continuous fluid delivery system and method
US9192734B2 (en) 2009-07-13 2015-11-24 Boehringer Ingelheim International Gmbh High-pressure chamber
WO2016101991A1 (en) * 2014-12-22 2016-06-30 Synergio Ab An implantable hydraulic displacement actuator, system, manufacturing and methods thereof
US9510853B2 (en) 2009-03-06 2016-12-06 Procept Biorobotics Corporation Tissue resection and treatment with shedding pulses
US9545487B2 (en) 2012-04-13 2017-01-17 Boehringer Ingelheim International Gmbh Dispenser with encoding means
US20170074256A1 (en) * 2015-09-16 2017-03-16 William Banko Bi-Metallic Solar Water Filtration Pump
US9682202B2 (en) 2009-05-18 2017-06-20 Boehringer Ingelheim International Gmbh Adapter, inhalation device, and atomizer
US9724482B2 (en) 2009-11-25 2017-08-08 Boehringer Ingelheim International Gmbh Nebulizer
US20170234307A1 (en) * 2014-03-02 2017-08-17 Swissinnov Product Sarl Volumetric pump with bleed mechanism
US9744313B2 (en) 2013-08-09 2017-08-29 Boehringer Ingelheim International Gmbh Nebulizer
US9757750B2 (en) 2011-04-01 2017-09-12 Boehringer Ingelheim International Gmbh Medicinal device with container
US9827384B2 (en) 2011-05-23 2017-11-28 Boehringer Ingelheim International Gmbh Nebulizer
IT201600072149A1 (it) * 2016-07-11 2018-01-11 Leuco Spa Pompa per erogare un liquido.
US9943654B2 (en) 2010-06-24 2018-04-17 Boehringer Ingelheim International Gmbh Nebulizer
US10004857B2 (en) 2013-08-09 2018-06-26 Boehringer Ingelheim International Gmbh Nebulizer
US10011906B2 (en) 2009-03-31 2018-07-03 Beohringer Ingelheim International Gmbh Method for coating a surface of a component
US10016568B2 (en) 2009-11-25 2018-07-10 Boehringer Ingelheim International Gmbh Nebulizer
US10099022B2 (en) 2014-05-07 2018-10-16 Boehringer Ingelheim International Gmbh Nebulizer
US10124125B2 (en) 2009-11-25 2018-11-13 Boehringer Ingelheim International Gmbh Nebulizer
US10124129B2 (en) 2008-01-02 2018-11-13 Boehringer Ingelheim International Gmbh Dispensing device, storage device and method for dispensing a formulation
US10195374B2 (en) 2014-05-07 2019-02-05 Boehringer Ingelheim International Gmbh Container, nebulizer and use
US10487818B2 (en) * 2014-02-26 2019-11-26 Garniman S.A. Hydraulically driven bellows pump
US10507319B2 (en) 2015-01-09 2019-12-17 Bayer Healthcare Llc Multiple fluid delivery system with multi-use disposable set and features thereof
US10524822B2 (en) 2009-03-06 2020-01-07 Procept Biorobotics Corporation Image-guided eye surgery apparatus
US10653438B2 (en) 2012-02-29 2020-05-19 Procept Biorobotics Corporation Automated image-guided tissue resection and treatment
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US11384749B2 (en) * 2018-10-02 2022-07-12 Obshchestvo S Ogranichennoj Otvetstvennost'yu “Toreg” Pump assembly
US12108964B2 (en) 2007-01-02 2024-10-08 Aquabeam, Llc Minimally invasive tissue treatment device
US12364803B2 (en) 2020-11-27 2025-07-22 Erbe Elektromedizin Gmbh Pump unit for medical purposes

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EP2711545A1 (de) * 2012-09-19 2014-03-26 Erbe Elektromedizin GmbH Pumpeinheit für die Wasserstrahlchirurgie
CN103195681B (zh) * 2013-04-12 2015-06-24 中国人民解放军军事医学科学院卫生装备研究所 一种医用水刀的双凸轮传动机构
CN104265619A (zh) * 2014-09-30 2015-01-07 罗凤玲 一种医用高压泵
CN106286201B (zh) * 2015-05-14 2018-12-04 惠州海卓科赛医疗有限公司 一种稳定高压医用泵
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CN106308886B (zh) * 2016-08-30 2019-04-12 苏州涵轩信息科技有限公司 一种补液装置及方法
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WO2018086136A1 (zh) * 2016-11-14 2018-05-17 惠州科赛医疗有限公司 一种稳压泵
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JP2008504086A (ja) 2008-02-14
CN1980609A (zh) 2007-06-13
AU2005259594A1 (en) 2006-01-12
CN100534395C (zh) 2009-09-02
JP4925213B2 (ja) 2012-04-25
DE102004031673B4 (de) 2009-04-16
EP1768580A1 (de) 2007-04-04
WO2006002817A1 (de) 2006-01-12
DE102004031673A1 (de) 2006-01-26
WO2006002817A8 (de) 2006-04-20
EP1768580B1 (de) 2013-09-18

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