Classifications

• • 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
  • F04B51/00—Testing machines, pumps, or pumping installations
• • 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
  • F04B43/00—Machines, pumps, or pumping installations having flexible working members
  • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
  • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
  • A61M5/142—Pressure infusion, e.g. using pumps
  • A61M5/14212—Pumping with an aspiration and an expulsion action
  • A61M5/14232—Roller pumps
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
  • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
  • A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
• • 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
  • F04B43/00—Machines, pumps, or pumping installations having flexible working members
  • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
  • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
  • F04B43/1261—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing the rollers being placed at the outside of the tubular flexible member
• • 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
  • F04B49/06—Control using electricity
  • F04B49/065—Control using electricity and making use of computers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M2205/00—General characteristics of the apparatus
  • A61M2205/12—General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M2205/00—General characteristics of the apparatus
  • A61M2205/14—Detection of the presence or absence of a tube, a connector or a container in an apparatus
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M2205/00—General characteristics of the apparatus
  • A61M2205/33—Controlling, regulating or measuring
  • A61M2205/3365—Rotational speed
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M2205/00—General characteristics of the apparatus
  • A61M2205/60—General characteristics of the apparatus with identification means
  • A61M2205/6063—Optical identification systems

Definitions

• the present invention relates to peristaltic cassettes which comprise a set of rollers driven by rotation about an axis.
• the invention is particularly intended for the medical field and aims to ensure recognition of such a cassette by the drive system in order to avoid the use of against-manners, operating problems and / or characteristics specific to the cassette used.
• the cassette comprises a set of rollers rotating about a central motor axis, each roller has an axis of which at least one end is slidably mounted, in a radial direction, in the slot of a plate called "spacer" disposed on a face of the cassette, this plate itself being made integral with the motor shaft, or driven by the rotation of the rollers, themselves driven for example by friction with the central axis.
• the speed of rotation of the rollers must be determined with the greatest possible precision because it makes it possible to determine the speed of flow or the flow of the liquid which moves through the cassette.
• the problem that the present invention proposes to solve lies in an improvement in the detection and measurement of the rotation of a peristaltic cassette and / or the identification of a cassette.
• the solution of the aforementioned problem consists of a device for the detection and identification of a peristaltic cassette equipped with a mechanism rotary device comprising rollers connected to a spacer and intended to be rotated by a drive system connected to the device; said device being characterized in that it comprises a sensor secured to the drive system arranged to detect the passage of at least one distinctive element disposed on said spacer by counting the number of distinctive elements detected during the a rotation of the cassette.
• the spacer is in principle essentially defined by two opposite faces, an inner face facing the inside of the cassette and an outer face facing the outside of the cassette.
• the device is in this case characterized in that it comprises a sensor arranged to detect the passage of at least one distinctive element visible on said outer face.
• the spacer can also be linked to the rollers, or any other means, to ensure a rotation that is proportional to the rotation of the rollers.
• the distinctive elements are located on a ring coming opposite said sensor during the rotation of the cassette. These distinctive elements do not necessarily have any other function and are added in this case to the functional elements of the cassette for the sole purpose of ensuring this detection or identification of the cassette.
• the sensor is optical.
• the spacer is either provided with openings that can be detected by the optical sensor during the rotation of the spacer, or optically reflective or opaque regions (marked surfaces) to ensure detection of these surfaces at the time of their passage opposite the sensor and thus an identification of the cassette.
• the orifices or marked surfaces may be distributed symmetrically or asymmetrically over a spacer diameter next to the optical sensor and thus represent coded information including identifying the type of cassette used. In order to read the information thus carried by the spacer, it is necessary to perform at least one full turn of the cassette. Such an identification may be particularly useful in avoiding cassette counterfeits intended for medical use to ensure that only cassettes guaranteed by the original manufacturer can be used by the training device.
• An example is the injectors of contrast products, requiring a high accuracy of operation to ensure that the injection to the patient is not interrupted or impaired.
• a malfunction during injection would represent a significant risk of having to repeat the examination of the CT Scanner and therefore a risk of irradiating the patient a second time with a sometimes large dose of X-rays.
• Using such a mechanism to identify an original cassette for example due to the nature of the sequence of orifices or recognized marked surfaces during a cassette rotation) the use of cassettes not originating from the original manufacturer is prevented.
• Such cassette marking is located within the cassette and requires operation of the cassette which is to be rotated in the apparatus (e.g. the injector) to be detected.
• the user can thus distort this detection mode by adding, for example, a marking or a label on the outside of the cassette, or by an opening of the cassette which must remain sterile and which would be possibly destroyed during such an operation.
• the detection of the rotation of the cassette during the injection ensures its proper operation and the amount actually injected over time by counting the number of rotation performed by the cassette and comparing it with the number of rotation expected due to the actual number of rotation of the drive shaft.
• Such a marking system of the cassette also informs the injector cassette type used, its performance and / or its expiry date, this to avoid the use of an outdated cassette.
• the sequence of markings and their spacing thus makes it possible to carry the desired specific information.
• CT Express 3D cassettes intended for a single patient
• CT Express 4D cassettes allowing use for multiple patients
• the invention is not limited to the embodiments described above and can be advantageously used in any type of device requiring identification of a type of rotating system for the administration of fluid, while ensuring high reliability against counterfeiting.
• FIG. 1 illustrates various sections and views of a spacer according to the invention
• FIG. 1 represents a spacer 1 of a shape somewhat similar to that illustrated in the application WO 2005/1 06251 but which differs in that it comprises three orifices 2 arranged on a ring whose diameter is greater than another ring in which are arranged slots 3 for guiding the rollers.
• the three orifices 2 have square sections. Any other shape of section or number of orifices can be used.
• the oscilloscope curve in Figure 2 shows valleys (illustrated by arrows) that reveal the passage of the orifices in front of the optical sensor.
• the general shape of this curve thus makes it possible to determine easily and quickly the type of cassette (because each type has a specific number of orifices) as well as its authenticity.

Landscapes

• Engineering & Computer Science (AREA)
• Health & Medical Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Heart & Thoracic Surgery (AREA)
• Vascular Medicine (AREA)
• Anesthesiology (AREA)
• Biomedical Technology (AREA)
• Hematology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Computer Hardware Design (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

Priority Applications (1)

Applications Claiming Priority (3)

Publications (1)

Family

ID=44227903

Family Applications (2)

Family Applications Before (1)

Country Status (3)

Families Citing this family (4)

Family Cites Families (7)

• 2011
  • 2011-03-21 EP EP11159081A patent/EP2503150A1/de not_active Withdrawn
• 2012
  • 2012-03-15 US US14/006,046 patent/US20140301866A1/en not_active Abandoned
  • 2012-03-15 WO PCT/IB2012/051246 patent/WO2012127377A1/fr active Application Filing
  • 2012-03-15 EP EP12717475.3A patent/EP2689135A1/de not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events