WO1992001420A1 - Messzelle für ein gerät zur überwachung von aus einem katheter austretender körperflüssigkeit - Google Patents
Messzelle für ein gerät zur überwachung von aus einem katheter austretender körperflüssigkeit Download PDFInfo
- Publication number
- WO1992001420A1 WO1992001420A1 PCT/EP1991/001347 EP9101347W WO9201420A1 WO 1992001420 A1 WO1992001420 A1 WO 1992001420A1 EP 9101347 W EP9101347 W EP 9101347W WO 9201420 A1 WO9201420 A1 WO 9201420A1
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- WIPO (PCT)
- Prior art keywords
- measuring
- chamber
- measuring cell
- electrodes
- inlet
- 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.)
- Ceased
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/20—Measuring for diagnostic purposes; Identification of persons for measuring urological functions restricted to the evaluation of the urinary system
- A61B5/207—Sensing devices adapted to collect urine
- A61B5/208—Sensing devices adapted to collect urine adapted to determine urine quantity, e.g. flow, volume
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/007—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring the level variations of storage tanks relative to the time
Definitions
- the invention relates to a measuring cell for a device for monitoring body fluid emerging from a catheter, in which the body fluid is collected using a measuring chamber in order to develop an electrical measurement signal corresponding to the filling volume, the filling volume being measured capacitively.
- the capacitance of a measuring capacitor is influenced by the fill level in the measuring chamber and the change in capacitance for generating the measuring signal is evaluated and the measuring capacitor has two electrodes, the electrical insulation of which is achieved by coating one or both electrodes with a dielectric and the electrodes are oriented in the filling direction of the measuring chamber.
- Such a device is known from DE-A-26 40 413.
- the body fluid passes from the patient's catheter through a tube to an inlet funnel and from there into the measuring chamber.
- the two separate electrodes are provided, which form the measuring capacitor and one of which is coated with a dielectric, so that the body fluid can only have conductive contact with the other electrode.
- the liquid flowing into the measuring chamber changes the capacitance of the measuring capacitor, specifically in direct dependence on the respective filling level and filling volume in the measuring chamber.
- a change in voltage is generated from the change in capacitance in a measuring voltage transmitter, which change is available as a measuring voltage and corresponds to the volume function.
- the measuring chamber is closed with a plunger, which is designed as a permanent magnet and is surrounded at a distance from it by a winding which, together with the plunger, forms a solenoid valve as a magnet winding. Contrary to the force of the magnet, the plunger is one Spring loaded. When the solenoid valve is energized, the plunger is pulled down to open the chamber outlet and drain the body fluid into a tube.
- the measuring electrodes are arranged diametrically to one another on the inner wall of the measuring chamber. This leads to the fact that when the device or the measuring chamber is inclined, a liquid surface is inclined to the filling direction of the measuring chamber, which causes falsified measurement results due to the relatively large distance between the measuring electrodes, so that incorrect collecting volume is determined and, in addition, the plunger for discharging the body fluid from the measuring chamber may be actuated at the wrong time.
- exact determination of the body fluid emerging from the catheter is required. This applies in particular to the monitoring of the direct discharge of urine from the body following operations or endoscopic interventions in the kidney and bladder with catheters inserted postoperatively.
- the known device Apart from the disadvantage that the known device only determines its fill level imprecisely when the measuring chamber is in an inclined position, it has a rather complicated structure. Thus, the valve closing the outlet is integrated in the structural unit, which also houses the measuring chamber, and the body fluid also flows around it when the outlet flows, so that there is a risk of the valve becoming encrusted. Since the device has only one lower valve, there is also the disadvantage that the device does not detect the body fluid dripping into the measuring chamber while the body fluid is being drained.
- An electronic control and monitoring device for the urine flow is known from DE-A-31 18 158, in which a measuring chamber has an inlet line and a • - *
- Abi auf1 ei device each of which a valve is assigned.
- An optical sensor is arranged between the valve of the inlet line and the measuring chamber, which detects a defined filling state after the measuring chamber has been filled and urine is stowed in the line to the level of the optical sensor and, when this urine level is reached, via the electronic control the inlet line valve closes and the outlet line valve opens.
- optical sensors At different filling levels of the measuring chamber so as to be able to determine the filling level of the body fluid in the measuring chamber.
- Each optical sensor consists of a light source and a photodetector, which enclose a bulge in the wall of the measuring chamber between them. Even with such a configuration of the device for monitoring the body fluid emerging from the catheter, measurement inaccuracies due to the inclined position of the measuring chamber cannot be ruled out. In addition, the measuring accuracy is further reduced by quantizing the measuring section by means of a few light barriers.
- EP-A-008 450 is ben of urine from cathetus' ri si Erten patients beschrie ⁇ a device for trapping, collecting and measuring.
- the device contains a container that is divided into several adjacent vertical chambers, in the first of which the inlet opens.
- the chambers are open to one another at the top and connected to the container drain at the bottom by a multi-way valve separated from one another.
- Each container chamber is provided with a volume scale, with the help of which the amount of liquid is determined.
- DE-A-38 12 587.7 describes a capacitive sensor Determination of the level and water content of brake fluid.
- the two electrodes at least one of which has an electrically insulating cover layer, are arranged centrally in the liquid container, one electrode being designed as a rod and being coaxially surrounded by the second electrode.
- test device for hydraulic function and approval testing of toilet bowls with water rinsing is known, which contains a capacitive level sensor in a central arrangement.
- the total rinse water volume, rinse flow, rinse water volume required to discharge solid wash items and the rinse water volume are determined from the measurement data.
- a measuring cell for a device for monitoring body fluid emerging from a catheter with a measuring chamber which receives the body fluid from above, with a cylindrical or polygonal middle part, a bottom part with a lower connecting piece, and a lockable one connected to it Drain hose and with a cover part with an upper connecting piece to which an inlet is also connected, and with two electrodes which are electrically insulated from one another in the measuring chamber and which form an electrical measuring capacitor which can be electrically connected to a measuring device via connecting lines marked- net that in the upper part of the measuring chamber there is an intermediate wall arranged obliquely to the central axis of the measuring cell, which separates the measuring space from an egg chamber, the end of the inlet also has a sufficient distance from it for the formation of a drip distance has an inclined intermediate wall, in the intermediate wall in the deepest area there is an opening closed by a non-return valve with respect to the egg chamber as a liquid passage from the inlet chamber into the measuring chamber, in the cover part there is a ventilation
- the closed design of the measuring space within the measuring chamber and its separation from a closed single chamber results in particular advantages when using the measuring cell to determine the outflow quantities of body fluid such as urine, hemofiltate, wound secretion, blood plasma, dialysis fluid, etc. .
- the inlet chamber forms a so-called Pasteurian chamber, with a drip section for entering body fluid and a check valve between the Pasteurian chamber and the actual measuring chamber and prevents the measuring liquid from flowing back from the measuring chamber or Pasteurian chamber into the catheter connected to the patient ⁇ ter even at extreme inclined positions of the device and thus prevents the transmission of germs of the measuring liquid from the measuring chamber, which is connected there to the outside world, to the patient.
- the retrograde germ migration is additionally prevented by the fact that the ventilation opening of the Pasteurian chamber is provided with a bacteria-tight filter. This design of the liquid entry into the measuring chamber ensures the high hygienic standard that must be required for the clinical use of such a device.
- the design and arrangement of the measuring electrodes ensures that the respective filling volume is determined exclusively in a central area of the measuring chamber, thus at a distance from its wall.
- An inclination of the measuring chamber from the usual measuring position or a "sloshing" of the liquid when the device is moving thus only causes an insignificant change in the fill level in the area of the measuring capacitor, so that a high measuring accuracy is ensured.
- the electrodes can be assigned to any component or represent any component. It is only necessary to ensure that they are arranged in the filling direction of the measuring chamber and that a gap remains between the two electrodes which are insulated from one another so that the body fluid can enter them and follow the variable fluid level.
- a special embodiment of the invention provides that the first electrode is designed as a thin rod and the second electrode as a tube, the tube concentrically surrounding the rod at a slight distance.
- the tube In its lower region, preferably at the lower end, the tube has at least one inlet opening for body fluid and above the maximum fill level there is at least one ventilation opening to the measuring chamber.
- the measuring capacitor is shielded radially from the body fluid located between the tube and the wall of the measuring chamber, so that the body fluid collected within the tube is calmed, which results in the determination of an exact fluid level further favored.
- the electrodes are preferably insulated from one another by the dielectric insulating layer on the rod and / or the tube.
- the electrodes can e.g. consist of solid metal (copper, nickel-plated brass, aluminum, stainless steel etc.) or of plastic carrier material coated with metal.
- a thermoplastic, sprayable, edible plastic which is metallized on the surface, preferably by vapor deposition with aluminum, nickel, copper, silver or chromium, etc., can preferably be used as the electrode material.
- the insulation of the electrodes can be extruded, applied by dipping or coating or vapor deposition, etc.
- the insulating dielectrics are polyolefins, polyesters, polyethers, polyamides, polyimides, polyurethanes, polyvinyl chlorides, polysulfones, polystyrenes, polyacrylates, polymethacrylates, polypropylenes, polyvinyl pyrides, done, fluoropolymers, derivatives of these compounds, mixtures and copolymers thereof as well as silicone rubbers into consideration, which are described in EP-B-214 392 as being suitable for medical devices.
- the electrodes preferably have a three-layer structure: an electrically conductive layer is arranged on a carrier material and an electrically insulating layer thereon.
- This structure can be produced particularly advantageously by coextrusion using a metallized plastic as the conductive layer. be put. However, it is also possible to metallize the plastic carrier material on the surface and then to apply the dielectric insulating layer on one or both electrodes.
- the chamber can have a circular or polygonal cross-section, one electrode being arranged centrally or offset from the center in the measuring chamber, while the other electrode concentrically surrounds the former.
- the measuring capacitor formed from the electrodes and the insulating layer can be held in the cover part and in the bottom part of the measuring chamber. It is very particularly preferred to hold the measuring capacitor only in the upper part of the measuring chamber.
- the electrodes extend through the cover part out of the measuring chamber.
- the upper end is preferably as
- the electrodes which are arranged concentrically to one another, can be held in this way by a sealing ring made of electrically insulating material with a clamp fit in the area of the cover part.
- the surface of the rod electrode and at least the inner surface of the tube electrode facing the rod electrode preferably have an anti-adhesive layer.
- the Abi hose is designed to be shut off underneath the base part.
- the inlet hose is also preferably designed to be lockable above the cover part.
- the barrier is preferably with clamping of the hose to form
- the invention also includes a method for the continuous monitoring of liquid emerging from a catheter, in particular urine and other body fluids, using the measuring cell according to the invention and a measuring and control device connected to the measuring cell.
- the body fluid passes through an inlet via a dropping section into the inlet chamber and from there, with the Abi shut off, also into the measuring chamber and into the measuring capacitor, the change in capacitance over time depending on the level in the measuring chamber being measured and thereby the Filling volume of the measuring room at certain times and the flow volume per unit time of body fluid is determined.
- the measuring chamber is emptied periodically when the inlet hose is shut off by briefly opening the Abi.
- the present invention is preferably used to monitor the flow of urine or other body fluids of a patient, the monitoring period being up to two weeks. It follows from this that the measurement must be carried out with constant accuracy within this period.
- deposits of e.g. Urea, protein or crystalline aggregates occur on the electrode surface, which influence the dielectric properties of the interelectrode space and thus the measuring accuracy.
- the surface of the rod and at least the inner surface of the tube facing the rod is coated with an anti-adhesive provided layer.
- the antiadhesive layer is applied directly to the electrically conductive electrode layer with the aid of an adhesion promoter, which at the same time achieves both the insulation of the electrodes and prevents deposition.
- Suitable anti-adhesive layer is heparin, urease or polyorganosiloxane bound to the electrode surface.
- Such a measuring chamber together with an electrical measuring device, enables a method for monitoring body fluid emerging from a catheter, in particular urine, the measuring fluid being fed from the catheter via an inlet, an automatically controllable inlet valve and a drip path into the Pasteurian chamber
- the check valve enters the measuring chamber and from there it reaches the measuring capacitor via an inlet opening, in which the capacitance is measured in time intervals of 10 milliseconds to 1 minute controlled by a microprocessor.
- both the filling volume of the measuring space at a certain point in time and the flow volume per unit of time can be determined. Flow volumes in the range of 5 ml per hour and 500 ml per hour can be measured with sufficient accuracy. If a critical minimum flow rate is undershot or a maximum flow rate is exceeded, the device triggers an alarm. After completion of the measurement, the measuring liquid is passed with the inlet valve closed through the outlet valve opened for this purpose and a nozzle into the collecting bag.
- the measuring chamber is used for ranges of maximum volume, preferably 10 to 500 ml. .1 emptied.
- the inlet valve is first closed and then the outlet valve is opened.
- air is passed through the bacteria-tight filter in the Pasteur chamber into the measuring chamber, which prevents germs from entering the measuring chamber.
- the drain valve remains open for 5 to 10 seconds, so that residues of measuring liquid can flow off the walls. Then the drain valve is first closed and then the inlet valve is opened at the beginning of a further measuring interval.
- the emptying of the measuring chamber is activated as described above.
- the electronic control and processing of measurement data for the liquid measurement enables special data storage.
- the entire measuring interval is preferably divided into 5-minute intervals, and the associated fill level is stored in three successive 5-minute intervals.
- the memory content is updated every 5 minutes by deleting the oldest and entering the most recent measured value.
- a position sensor can be installed in the housing of the electronic measuring device, which interrupts the measurement when the inclined position of the measuring chamber is exceeded by 15 ° from the vertical by activating the closing mechanism of the inlet and outlet valve. In this case, the staff is alerted by a signal. This ensures that the device is always in a certain position Tilt interval of the measuring cell and thus is operated with sufficient accuracy and the function of the Pasteurian chamber is guaranteed.
- Another aspect of the present invention is to provide a device of the type mentioned, in which the body fluid permeability, the measuring cell, the drain hose and the collection bag are designed as disposable items, the device part containing the measuring cell can be easily installed in the measuring device.
- the inexpensive manufacture of the measuring cell as a single article arises in particular when the measuring capacitor is formed from the simple components mentioned, namely the tube and rod, the measuring capacitor passing through the measuring chamber, in this area the rod centrally over a sealing ring for Tube is held and the measuring capacitor is provided with a contact surface which enables a simple plug, spring or clamping connection to the electronic measuring and control part of the device.
- the measuring capacitor is preferably connected to the measuring and control unit with the aid of a plug and a connecting cable.
- this can also have an optical scanning device at the level of the maximum fill level in the measurement chamber, so that at least the maximum fill level can be detected in the event of a failure of the capacitive measuring system.
- the device is advantageously designed as a mobile system, so that the patient connected to it can move largely freely, for example in order to undergo further clinical examinations.
- the measuring cell out of plastic with the minimal amounts of metal required to form the measuring capacitor and of the contact shoe together with the connecting hose and the Abi also and a collection bag possibly connected to it as a single article and packaged in a sterile condition and placed on the market.
- the measuring and control device and the connecting cable can be used in many and long-term together with the measuring cell intended for single use.
- the measuring cell is expediently held in a clamp or, in an alternative embodiment, is fixed by inserting guide ribs arranged on the measuring cell into recesses provided for this purpose in the housing, so that it can be easily replaced.
- the optical scanning device can also be integrated into the bracket.
- FIG. 1 shows an overall view of the device for monitoring body fluid emerging from a catheter, in a schematic representation
- Figure 2 shows a section of the device for the area through which the body fluid flows, in particular the measuring cell drawn in a vertical section
- FIG. 3 shows a horizontal section through the measuring chamber of the device along the line AA in FIG. 2.
- FIG. 4 shows a longitudinal section through a second embodiment of the measuring cell and
- Figure 5 is an overall view of a second embodiment of the device for monitoring body fluid emerging from a catheter in a schematic representation.
- FIG. 1 shows a carrier plate 50 which can be attached vertically to a bed of a patient, for example, and which has two angle elements 2.
- a housing 1 of the measuring device which is used primarily for monitoring body fluid such as urine emerging from a catheter, with its respective lower right and lower left edge can be inserted into this.
- the box-shaped housing 1 accommodates the electronics 1 of the device (not shown in more detail), furthermore mechanical elements to be described in more detail, for controlling the inflow or outflow of fluid into and out of the measuring cell through which the body fluid flows.
- This device part or measuring cell 3 can be inserted to the left of the housing 1 in a manner to be described in more detail in the housing 12.
- the measuring cell 3 has a measuring chamber 4, in the upper connecting piece 5 of which there is also an admixture 5 for body fluid and in the lower connecting piece 7 of which there is also an Abi opener 8.
- the measuring chamber 4 has a cylindrical tubular middle part 9, on the upper end of which a lid part 10 and on the lower end of which a bottom part 11 is attached.
- the inlet hose 6, the cover part 10 with the upper connecting piece 5, the middle part 9 and the bottom part 11 with the discharge hose 8 are connected to one another in a liquid-tight manner.
- the parts mentioned are made of a transparent plastic and thus allow a view into the interior of the measuring chamber 4 and the hoses 5 and 8. As can be seen in detail from the illustration in FIG.
- the housing 1 has a lower one on its left a corner in one of the angled elements 2 can be inserted w or- crack 12 which is provided at the top with a pin.
- the pin 13 has a hemispherical upper end and serves to receive a cylindrical sleeve 14 formed at the bottom in the bottom part 11, the inside diameter of which is slightly larger than the outside diameter of the pin 13, so that the measuring chamber 4 is largely free of play can be placed on top of the projection 12.
- the measuring chamber 4 is additionally held at half height between a holding rib 51 connected to the front device housing 1 a and a resilient clamping bracket 52 connected to the device rear wall 1 b.
- the lower connecting piece 7 Adjacent to the cylindrical sleeve 14, the lower connecting piece 7 is molded into the bottom part 11 and the upper connecting piece 5 is parallel to the lateral surface of the central part 9, and the measuring cell 3 is held in addition to the plug connection of the pin 13 and the cylindrical sleeve 14 by means of two mechanical hose clamps, an upper hose clamp 15 being associated with the inlet hose 6 at a slight distance from the upper connection piece 5 and a lower hose clamp 16 at the outlet also being 8 at a slight distance from the lower connection piece 7.
- an upper drive 18 for a pull rod 19 engaging behind the inlet hose 6 is arranged in the housing 1 of the electronic measuring device in the upper region of the side wall 17 facing the measuring cell 3.
- FIG. 2 shows, with the measuring cell 3 inserted in the housing 1, the inlet hose 6 in the open state and the outlet hose 8 in the closed state, thus the measuring cell 3 in the operating position in which the body fluid, for example urine, exiting the body is total ⁇ melt and can be measured.
- the pull rod 21 lies with a leg 22 engaging behind the Abi also 8 on the region of the housing 1 facing away from the housing 1 Drain hose 8 and pulls this against the
- the liquid inlet and outlet is thus designed as a hose clamp valve.
- the cover part 10 and the connecting piece 5 are penetrated by the beveled end of the Zul also 6.
- the end protrudes into a so-called Pasteurian chamber 25 which is inclined in the measuring chamber 4 between the cover part 10, an essentially corresponding to the slope of the beveled end 24 of the closure 1, and the partition wall 26 arranged between the latter and the cover part 10 located wall section of the middle part 9 is formed.
- a vent opening 28 is arranged adjacent to the middle part 9 with a filter 27, which additionally has support paths (not shown in more detail) for a PTFE membrane.
- the intermediate wall 26 passes through a through opening 29, which is closed by an elastic valve plate 30 arranged below the intermediate wall 26 and fastened with it.
- Liquid can thus enter through the inlet hose 6 into the Pasteurian chamber 25 with a drip section which has a length of 10 to 75 mm, preferably 30 mm, and from there passes through the opening 29 past the open valve into the actual valve - borrow measurement room 31 for graduation also 8.
- Reference number .32 denotes the axis of rotation of the cylindrical central part 9 of the measuring chamber 4. When the measuring cell 3 is properly inserted into the housing 1, this axis of rotation 32 corresponds to a vertical.
- the measuring chamber 4 passes symmetrically to the axis of rotation 32 a tubular electrode 33 made of corrosion-resistant metal or metallized plastic, which over the cover part 10 is led out.
- a thin rod electrode 34 of corrosion-resistant metal or metallized plastic is arranged symmetrically to the axis of rotation 32 within the tube electrode 33, and this is also led beyond the cover part in accordance with the tube electrode 33.
- the space between the tube electrode 33 and the rod electrode 34 seals a sealing ring
- the rod electrode 34 is inserted into a bearing attachment 36 of the base part 11 and passes through there a star-shaped sleeve 37 which is inserted into the lower end of the tubular electrode 33.
- a star-shaped sleeve 37 which is inserted into the lower end of the tubular electrode 33.
- the rod electrode 34 is provided with an insulating layer 38 so that the rod electrode 34 is insulated from the tube electrode 33 within the measuring chamber 4 .
- vent holes 39 are provided in the tube electrode 33 distributed over its circumference.
- a plug 40 is connected to the region of the tubular electrode 33 and rod electrode 34 projecting above the cover part 10 and is connected via electrical line 41 to the printed circuit board 42, that is to say the electronic part of the measuring and control device.
- the measuring cell 3 Before the measuring cell 3 according to the invention is operated, the measuring cell 3 is plugged onto the pin 13 of the housing and clamped between the retaining rib 51 and the clamping bracket 52, and the plug, which is designed as a commercially available component with ring contact and hole contact, consists of a lb in the rear wall of the device provided socket 53 removed for idle operation and plugged onto the tubular electrode 33 and the rod electrode 34.
- the inlet hose 6 and the Abi slurry 8 are then inserted into the upper hose clamp 15 or lower hose clamp 16 and the lower pull rod 21 is inserted into the closed hose clamp.
- the star-shaped design of the sleeve 37 results in an opening 47 between the tubular electrode 33 and the rod electrode 34 in the lower area thereof, so that a liquid level corresponding to that between the tube electrode 33 and the central part 9 is established in the annular space 43 forming a measuring gap between the rod electrode 34 and the tube electrode 33.
- air located above the liquid is pressed through the ventilation holes 39 into the measuring space 31.
- the distance between the rod electrode 34 and the tubular electrode 33 is so small that the liquid level in the annular space 43 can follow that in the measuring space 31 unhindered. Even with the weirdest !!
- the measuring chamber 4 in whatever direction, as well as if the urine sloshes in the measuring chamber, ensures accurate measuring results of the measuring capacitor formed because of the small distance between the components functioning as electrodes.
- the amount of liquid collected in the measuring chamber 31 is shown via the measuring capacitor, the connector 40, the electrical line 41 and the circuit board 42 in displays 44 and 45 of the device, which represent, for example, the liquid volume per hour or per day.
- the Measuring cell 3 have an optical scanning device 46 which is embedded in a groove of the clamping bracket 52 and the holding rib 51 and which triggers an alarm when a maximum level is exceeded.
- further auxiliary displays are conceivable, for example a display 48 for changing the collection bag which is also connected to the school leaving certificate.
- the device has an on-off switch 54 and an alarm indicator 55.
- Reference number 49 in the illustration in FIGS. 1 and 2 denotes an unquenched liquid level in the measuring space 31.
- FIG. 3 A further embodiment of the measuring cell 3 containing the measuring chamber 4 is shown in FIG.
- the reference numerals designate identical or equivalent components to FIG. 2.
- the measuring cell 3 likewise has a measuring chamber 4, in the upper connecting piece 5 of which there is an inlet hose 6 and in the lower connecting piece 7 of which an Abi Aufschl also 8, which leads to a collecting bag.
- the measuring cell 3 is also made up of a cylindrical tube middle part 9, a cover part 10 and a bottom part 11 and consists of a transparent plastic and therefore allows an insight into the interior of the measuring chamber 4.
- the Pasteur chamber 25 is worked out as part of the cover part 10.
- the Pasteurian chamber 25 is separated from the actual measuring space 31 by a check valve which is let into a bevelled intermediate wall 26.
- the arrangement of the measuring capacitor 33, 34, 38 is also different from the first embodiment.
- the measuring capacitor is not mounted centrally in the measuring chamber 4, is fastened in the cover part 10 and rests on the bottom part 11 with only one side of the tube 33. As a result, the measuring capacitor is open at the bottom.
- the compensation of the liquid level between the measuring space 31 and the capacitor ring space 43 is ensured by vent holes 39 in the tube 33 above the maximum liquid level.
- the measuring capacitor also consists of a tubular electrode 33 which coaxially surrounds a rod electrode 34. At the level of the cover part 10, a sealing ring 35 seals the capacitor annular space 43.
- the measuring liquid coming from the catheter through the inlet 6 also enters the Pasteurian chamber 25 with a dropping section which has a length of 10 to 75 mm, preferably 30 mm, and from there passes through the opening 29 with the valve plate 30 open into the measuring space 31.
- the mode of operation of the second exemplary embodiment is analogous to the first exemplary embodiment, as already described.
- the measuring cell 3 of the second exemplary embodiment has two guide ribs 67 in the region of the cylindrical pipe section 9 of the measuring chamber 4, which guide ribs (not shown) run out on the end face of the measuring cell 3.
- measuring cell 3 As can be seen from FIG. 5, for the installation of the disposable article consisting of measuring cell 3, urine inlet hose also 6, urine drain hose 8 and urine collecting bag (not shown) in the device housing 1 according to the second exemplary embodiment, measuring cell 3 is included the guide ribs 67 are inserted into recesses 68 of the housing 1 provided for this purpose with the aid of the handle against a resistance and thus firmly locked in the housing 1. Thereafter, in a manner analogous to the first exemplary embodiment, the urine inlet 6 and abdominal opening 8 are also introduced into the hose clamping devices 15, 16 provided for this purpose, which are identical to the first exemplary embodiment, and the urine collecting bag is attached to the devices provided for this purpose
- the carrier plate 50 can additionally be provided with a flap 56 for inserting the device from above, and also in the upper region with slots 57 for receiving fastening straps which can be connected to a bed frame 58.
- holes 59 can be provided in the upper area of the housing 1 for the fastening straps fixing the housing 1 with the carrier plate 50, as well as a recess 60 as a carrier handle for the device, which also has a further one with the carrier plate 50 connected holding element 61 can enforce.
- Two spaced apart on the underside of the housing 1 tabs 62 enforce with suspension hooks 63 suspension eyes 64 of a urine bag 65 with a capacity of 2 to 2,000 se se se, which is connected via a hose adapter 66 to the drain hose 8.
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4023336.7 | 1990-07-23 | ||
| DE19904023336 DE4023336A1 (de) | 1990-07-23 | 1990-07-23 | Geraet zur ueberwachung von aus einem katheter austretender koerperfluessigkeit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1992001420A1 true WO1992001420A1 (de) | 1992-02-06 |
Family
ID=6410823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1991/001347 Ceased WO1992001420A1 (de) | 1990-07-23 | 1991-07-18 | Messzelle für ein gerät zur überwachung von aus einem katheter austretender körperflüssigkeit |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0540569A1 (de) |
| AU (1) | AU8216091A (de) |
| DE (1) | DE4023336A1 (de) |
| WO (1) | WO1992001420A1 (de) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993009715A1 (de) * | 1991-11-12 | 1993-05-27 | Sigfried Hessberg | Messzelle für ein gerät zur überwachung von aus einem katheter austretender körperflüssigkeit |
| WO1993024052A1 (de) * | 1992-05-30 | 1993-12-09 | Sigfried Hessberg | Messzelle für ein gerät zur überwachung von aus einem katheter austretender körperflüssigkeit |
| WO2009081194A1 (en) * | 2007-12-21 | 2009-07-02 | The Newcastle-Upon-Tyne Hospitals Nhs Foundation Trust | Apparatus for measuring parameters of fluid flow |
| DE102016123869A1 (de) * | 2016-12-08 | 2018-06-14 | Endress+Hauser Conducta Gmbh+Co. Kg | Elektrochemischer Sensor |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4137074A1 (de) * | 1991-11-12 | 1993-05-13 | Hessberg Sigfried Dipl Ing | Messzelle fuer ein geraet zur ueberwachung von aus einem katheter austretender koerperfluessigkeit |
| DE4137075C2 (de) * | 1991-11-12 | 1993-11-11 | Sigfried Dipl Ing Hesberg | Meßzelle für ein Gerät zur Überwachung von aus einem Katheter austretender Körperflüssigkeit |
| DE4338687C1 (de) * | 1993-11-12 | 1995-07-06 | Fresenius Ag | Urinmeßgerät und Verfahren zum Ermitteln der Dichte von Urin |
| US7022098B2 (en) | 2002-04-10 | 2006-04-04 | Baxter International Inc. | Access disconnection systems and methods |
| US7138088B2 (en) | 2002-04-10 | 2006-11-21 | Baxter International Inc. | Access disconnection system and methods |
| US10155082B2 (en) | 2002-04-10 | 2018-12-18 | Baxter International Inc. | Enhanced signal detection for access disconnection systems |
| US7052480B2 (en) | 2002-04-10 | 2006-05-30 | Baxter International Inc. | Access disconnection systems and methods |
| US20040254513A1 (en) | 2002-04-10 | 2004-12-16 | Sherwin Shang | Conductive polymer materials and applications thereof including monitoring and providing effective therapy |
| RU2256884C2 (ru) * | 2002-10-31 | 2005-07-20 | Открытое акционерное общество " Московский научно-исследовательский институт "Агат" | Емкостный датчик объема жидкости для урофлоуметра |
| US8029454B2 (en) | 2003-11-05 | 2011-10-04 | Baxter International Inc. | High convection home hemodialysis/hemofiltration and sorbent system |
| US8114043B2 (en) | 2008-07-25 | 2012-02-14 | Baxter International Inc. | Electromagnetic induction access disconnect sensor |
| ES2395501B1 (es) | 2011-05-31 | 2013-12-27 | Consejo Superior De Investigaciones Científicas (Csic) | Dispositivo para la medición automática de la cantidad de líquido que fluye y el procedimiento para su medición. |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3831446A (en) * | 1973-05-14 | 1974-08-27 | Kendall & Co | Apparatus for measuring average flow rate |
| FR2296839A1 (fr) * | 1975-01-03 | 1976-07-30 | Wolf Gmbh Richard | Appareil pour mesurer electriquement des debits d'urine |
| US4100802A (en) * | 1977-06-08 | 1978-07-18 | The Kendall Company | Liquid measuring device |
| DE3118158A1 (de) * | 1980-05-16 | 1982-05-13 | C.R. Bard, Inc., 07974 Murray Hill, N.J. | "elektronische steuer- und ueberwachungsvorrichtung fuer den urindurchfluss" |
| GB2218812A (en) * | 1988-05-18 | 1989-11-22 | Ormed Limited | A capacitive apparatus for measuring liquid volume and flow rate |
| WO1984003213A1 (en) * | 1983-02-18 | 1990-10-30 | Whitman Med Corp | Isolation of forestream and midstream portions of collected urine samples |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2640413C3 (de) * | 1976-09-08 | 1980-03-27 | Richard Wolf Gmbh, 7134 Knittlingen | Katheter-Überwachungsgerät |
| CH664784A5 (en) * | 1984-06-12 | 1988-03-31 | Geberit Ag | Flush toilet hydraulic properties testing system - collects water and solids and measures vol. electronically |
| US4745929A (en) * | 1985-12-27 | 1988-05-24 | The Kendall Company | Liquid drainage system with light emitters and detectors |
| DE3812687A1 (de) * | 1988-04-16 | 1989-10-26 | Duerrwaechter E Dr Doduco | Kapazitiver sensor zum bestimmen des niveaus einer fluessigkeit in einem behaelter |
-
1990
- 1990-07-23 DE DE19904023336 patent/DE4023336A1/de not_active Ceased
-
1991
- 1991-07-18 WO PCT/EP1991/001347 patent/WO1992001420A1/de not_active Ceased
- 1991-07-18 AU AU82160/91A patent/AU8216091A/en not_active Abandoned
- 1991-07-18 EP EP19910913009 patent/EP0540569A1/de not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3831446A (en) * | 1973-05-14 | 1974-08-27 | Kendall & Co | Apparatus for measuring average flow rate |
| FR2296839A1 (fr) * | 1975-01-03 | 1976-07-30 | Wolf Gmbh Richard | Appareil pour mesurer electriquement des debits d'urine |
| US4100802A (en) * | 1977-06-08 | 1978-07-18 | The Kendall Company | Liquid measuring device |
| DE3118158A1 (de) * | 1980-05-16 | 1982-05-13 | C.R. Bard, Inc., 07974 Murray Hill, N.J. | "elektronische steuer- und ueberwachungsvorrichtung fuer den urindurchfluss" |
| WO1984003213A1 (en) * | 1983-02-18 | 1990-10-30 | Whitman Med Corp | Isolation of forestream and midstream portions of collected urine samples |
| GB2218812A (en) * | 1988-05-18 | 1989-11-22 | Ormed Limited | A capacitive apparatus for measuring liquid volume and flow rate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993009715A1 (de) * | 1991-11-12 | 1993-05-27 | Sigfried Hessberg | Messzelle für ein gerät zur überwachung von aus einem katheter austretender körperflüssigkeit |
| WO1993024052A1 (de) * | 1992-05-30 | 1993-12-09 | Sigfried Hessberg | Messzelle für ein gerät zur überwachung von aus einem katheter austretender körperflüssigkeit |
| WO2009081194A1 (en) * | 2007-12-21 | 2009-07-02 | The Newcastle-Upon-Tyne Hospitals Nhs Foundation Trust | Apparatus for measuring parameters of fluid flow |
| DE102016123869A1 (de) * | 2016-12-08 | 2018-06-14 | Endress+Hauser Conducta Gmbh+Co. Kg | Elektrochemischer Sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0540569A1 (de) | 1993-05-12 |
| AU8216091A (en) | 1992-02-18 |
| DE4023336A1 (de) | 1992-02-06 |
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