Medical condensate trap for medical use, method for dehumidifying, blood treatment apparatus, blood treatment device

Abstract

The present disclosure relates to a medical condensate trap for use in external blood treatment by means of a blood treatment apparatus. The condensate trap comprises an interior; a first connection for connecting the interior in fluid communication to a gas outlet of the blood treatment apparatus; a second connection for connecting the interior in fluid communication to a gas inlet of the blood treatment apparatus; and a third connection for connecting the interior to an air port of a blood treatment device. The blood treatment device may be, for example, a blood tubing set or a blood cassette.

Claims

1. A medical condensate trap for use in a blood treatment performed externally using a blood treatment apparatus, wherein the condensate trap comprises: an interior; a first connector structured to connect with tubing and defining a first port on a first surface of a housing of the condensate trap, wherein the first port is fluidly coupled with the interior, and wherein the first connector is configured to connect the interior to a gas outlet of the blood treatment apparatus in fluid communication; a second connector structured to connect with tubing and defining a second port on a second surface of the housing, wherein the second port is fluidly coupled with the interior, wherein the second connector is configured to connect the interior to a gas inlet of the blood treatment apparatus in fluid communication; and a third connector structured to connect with tubing and defining a third port on a third surface of the housing, wherein the third port is fluidly coupled with the interior, wherein the third connector is configured to connect the interior to an air port of a blood treatment device; wherein: the condensate trap is configured to dehumidify at least one section of the blood treatment apparatus or the blood treatment device without the use of a filter; the second surface of the housing and the third surface of the housing are spaced apart and are parallel to each other; and and the first surface extends between the second surface of the housing and the third surface of the housing and is generally perpendicular to the second surface of the housing and the third surface of the housing.

2. The medical condensate trap according to claim 1, wherein the condensate trap is configured to be used in an orientation in which the third port is arranged higher than the first port and the second port.

3. The medical condensate trap according to claim 1, wherein the condensate trap is configured to be used in an orientation in which the third port is arranged higher than the first port or the second port.

4. The medical condensate trap according to claim 1, wherein the condensate trap is configured to be used in an orientation in which the first port is arranged higher than the second port.

5. The medical condensate trap according to claim 1, wherein the third port is associated with a first end area of the interior, wherein the second port is associated with a second end area of the interior, wherein the second end area is opposite to the first end area, and wherein the first port is arranged between the second port and the third port.

6. The medical condensate trap according to claim 1, wherein the interior is separated by the housing from an exterior of the condensate trap, wherein the interior has an extension in a longitudinal direction and an extension in a transverse direction, and wherein the housing comprises: at least a first opening fluidly connected with the interior through the first port; at least a second opening fluidly connected with the interior through the second port; and at least a third opening fluidly connected with the interior through the third port.

7. The medical condensate trap according to claim 6, wherein the distance between the first opening and the third opening is greater than or equal to the extension in the transverse direction.

8. The medical condensate trap according to claim 6, wherein the distance between the first opening and the second opening is greater than or equal to the extension of the interior in the transverse direction.

9. The medical condensate trap according to claim 6, wherein tubes, with an inner diameter, are connected to the first, second, and third ports, and wherein the inner diameter is less than the extension of the interior in the transverse direction.

10. The medical condensate trap according to claim 6, wherein a diameter, a surface, or a length of a surface of at least one of the first opening, the second opening, or the third opening, is smaller than the extension of the interior in the transverse direction.

11. The medical condensate trap according to claim 1, wherein the blood treatment device comprises a blood tubing set or a blood cassette.

12. A blood treatment apparatus which comprises, or is connected to, a condensate trap, wherein the condensate trap comprises: an interior; a first connector structured to connect with tubing and defining a first port that is fluidly coupled with the interior, wherein the first connector is fluidly coupled to a gas outlet of the blood treatment apparatus; a second connector structured to connect with tubing and defining a second port that is fluidly coupled with the interior, wherein the second connector is fluidly coupled to a gas inlet of the blood treatment apparatus; and a third connector structured to connect with tubing and defining a third port that is fluidly coupled with the interior, wherein the third connector is fluidly coupled to an air port of a blood cassette or blood tubing of a blood treatment device; wherein the condensate trap is configured to dehumidify at least one section of the blood treatment apparatus or the blood treatment device without the use of a filter.

13. The blood treatment apparatus according to claim 12, wherein the blood treatment apparatus is embodied as a blood tubing set and a blood cassette.

Description

BRIEF DESCRIPTION OF THE FIGURES

(1) FIG. 1 shows a longitudinal section of a condensate trapof an exemplary embodiment;

(2) FIG. 2 shows a longitudinal section of a condensate trap in a second exemplary embodiment;

(3) FIG. 3 shows a schematically simplified portions of a single-needle pneumatic unit of a blood treatment apparatus; and

(4) FIG. 4 shows a schematically simplified execution of the method in an exemplary embodiment.

DETAILED DESCRIPTION OF THE FIGURES

(5) FIG. 1 shows a longitudinal section of a condensate trap 100 according to an exemplary embodiment of the present invention.

(6) The condensate trap 100 comprises an interior I which may be understood as a compartment or chamber suitable for receiving or conducting. The interior I may to this end, as shown in FIG. 1, be sealed against an exterior A of the condensate trap 100 so that a gas exchange between the interior I and the exterior A of the condensate trap 100 is only possible through ports of the condensate trap 100.

(7) The ports comprised by the condensate trap 100 for this purpose are: a first port 1 fore.g. directly or indirectly (i.e. for example via tubes)connecting the interior I in fluid communication with a gas outlet 301, being illustrated only in FIG. 3, of a blood treatment apparatus 300, a second port 2 for connecting the interior I in fluid communication with a gas inlet 302, being illustrated only in FIG. 3, of the blood treatment apparatus 300 and a third port 3 for connecting the interior I to a gas inlet/gas outlet, e.g. to an air port or compressed air port 201again being illustrated only in FIG. 3of e.g. a blood tubing set or of a blood cassette 200, see FIG. 3.

(8) A sealing between interior I and exterior A may be achieved by O-rings 1a, 2a and 3a or in a different manner.

(9) The ports 1, 2 and/or 3 may, as exemplarily seen in FIG. 1, be embodied as female or male end pieces of connectors. They may be embodied as parts of Luer connectors. They may comprise bayonet-connector elements. They may be provided or used for the connection or for connecting to tubes.

(10) The condensate trap 100 may in each embodiment be optionally made of POM (Polyoxymetheylene) or may comprise POM. Spouts of the condensate trap 100 may be passivated, e.g. by a metal or aluminum or may be covered or coated with these materials or another corrosion protection.

(11) FIG. 2 shows a longitudinal section of a condensate trap 100 in a second exemplary embodiment. Its interior I has an extension D in a transverse direction and an extension L in longitudinal direction. E1 and E2 denote in FIG. 2 the first or second end area.

(12) The interior I is separated from the exterior A by a housing 5. The housing 5 comprises a first opening 1b, a second opening 2b and a third opening 3b. They serve the gas exchange between the interior I and the gas inlets and gas outlets 301, 302, and 201 which are connected to the condensate trap 100.

(13) In the exemplary embodiment shown in FIG. 2, the distance between the first opening 1b and the third opening 3b is at least as big as the extension D of the interior I in its transverse direction, for example its inner diameter. The inner diameter may be e.g. within a range from 1 mm to 4 mm, preferably it is between 1.2 mm or 2.0 mm, or an arbitrary intermediate value.

(14) In the exemplary embodiment shown in FIG. 2, the distance between the first opening 1b and the second opening 2b is optionally as big as the extension D of the interior I.

(15) In FIG. 2, the first port 1 is connected to a connection tube 1d, which is provided to connect in fluid communication the interior I to the gas outlet 301, shown in FIG. 3, of a blood treatment apparatus 300 being only roughly indicated in FIG. 2.

(16) In FIG. 2, the second port 2 is connected to a connection tube 2d which is provided to connect in fluid communication the interior I to the gas inlet 302, shown in FIG. 3, of a blood treatment apparatus 300 being only roughly indicated in FIG. 2.

(17) In FIG. 2, the third port 3 is connected to a connection tube 3d which is provided to connect in fluid communication the interior I to a compressed air port or air port 201, shown in FIG. 3, of a blood cassette 200 being only roughly indicated in FIG. 2, wherein the air port 201 serves as gas inlet and/or gas outlet of the blood cassette 200. The connection tube 3d is embodied as short as possible, e.g. 1 cm to 6 cm, e.g. between 2 cm and 5 cm, or it has an arbitrary intermediate value.

(18) FIG. 1 and FIG. 2 show the condensate trap 100 in a use position, i.e. in a perpendicular position or substantially perpendicular position, in which a first end area E1 of the condensate trap 100 or of the interior I is arranged further to the top than a second end area E2, lying opposite to first end area E1, of the condensate trap 100 or of the interior I.

(19) The arrows illustrated next to the connection lines 1d, 2d, and 3d indicate the flow direction of the gas when the condensate trap 100 is in operation.

(20) FIG. 3 shows schematically simplified portions of a single-needle pneumatic unit of a blood treatment apparatus 300. Although FIG. 3 indicates a relation of the present invention to a single-needle treatment, the present invention is not limited thereto. Some embodiments are suitable for use in each extracorporeal blood treatment in which moisture-saturated air (or in general: gas) is alternately conveyed back and forth, and in which one expects benefits of removing moisture or condensate.

(21) The single-needle pneumatic unit of FIG. 3 comprises, optionally, a single-needle tank 303. The latter serves to intermediately store gas from a single-needle chamber 203 of a blood treatment cassette 200 being only roughly indicated in FIG. 3. Its capacity may reach around 300 ml.

(22) A pressure sensor S903 and/or a temperature sensor S904 may be optionally provided for measuring pressure or temperature of the gas stored in the single-needle tank 303.

(23) Further pressure sensors S902 and S905 may be provided upstream or downstream of a compressor 305 of the single-needle pneumatic unit. A bypass line and valves V901 and/or V903 for releasing or activating it may further be provided.

(24) The single-needle pneumatic unit shown in FIG. 3 comprises a gas outlet 301 arranged downstream of the compressor 305 and a gas inlet 302 arranged upstream of the compressor 305 and/or of the single-needle tank 303. They are in FIG. 3 connected to the connection lines 1d or 2d, respectively.

(25) As is seen in FIG. 3, the blood cassette 200 is supplied with air, after the latterbeing effected by the compressor 305perfuses the condensate trap 100. The air is supplied directly by the compressor 305 in FIG. 3. Therein, the air flows through the port 1 (which is positioned higher during use of the condensate trap 100), into the interior I of the condensate trap 100, and from there further towards the air port 201.

(26) The situation can be different with the exhaust air of the air port 201, i.e. the air extracted out of the blood cassette 200 through the air port 201. Said air perfuses the second port 2 positioned lowerwhen compared to the first port 1into the gas inlet 302 of the single-needle pneumatic unit. The wet part of the exhaust air is separated, directly after the gas inlet 302, from the fluid flow and conveyed to an optional condensate collection 307. The condensate collection 307 may be connected to a device for evaporating and/or to an aeration or deaeration device 309.

(27) FIG. 4 shows schematically simplified the execution of the method according to the present disclosure in an exemplary embodiment.

(28) The method encompasses providing a blood treatment apparatus according to the present disclosure which comprises a blood pump in addition to the compressor 305.

(29) The blood treatment apparatus 300 is being, or is connected to a blood cassette 200, which comprises a single-needle chamber 203 and an air port 201. The blood cassette 200 further comprises a hydrophobic membrane 205 which is arranged in fluid communication between the single-needle chamber 203 and the air port 201.

(30) The blood treatment apparatus 300 comprises a control device 350 which is schematically shown in FIG. 3 and which is programmed to execute or effect at least once a ventilation process comprising or consisting of the following steps:

(31) In an optional step S1, a pre-determined pressure is built up in the single-needle chamber 203. This may be achieved by means of the blood pump and/or by means of the compressor 305. If the building up of pressure is achieved by the compressor, then this is preferably done at a conveying rate, which does not exceed the conveying rate at which air is conveyed into the single-needle chamber 203 in the venous phase, i.e. when emptying the single-needle chamber 203.

(32) In step S3 the pressure is released towards the single-needle tank 303 or in the surroundings in order to achieve a high-peak flow. This may take place abruptly by opening a valve.

(33) In step S5, again optional, conveying takes place with an open valve V903 between condensate collection and compressor inlet by means of the compressor 305. This serves conveying the condensate into the single-needle pneumatic unit. There, it may be separated by a special arrangement (e.g. a collection chamber with a facility for emptying the lowest point of the single-needle pneumatic unit).

(34) The control device 350 may be programmed to execute the de-aeration procedure with the steps S1 to S5 whenever a pre-determined condition has been fulfilled. The possible pre-determined conditions may include the completion of a pre-determined period of time since the de-aeration executed last, reaching/falling below a pre-determined temperature, reaching/falling below a pre-determined flow ratio and/or detecting a pre-determined wavelength, e.g. in transmission or light scattering measurements at the gas inlet 302. The presence of the pre-determined condition may be checked in a higher-level step S0.

LIST OF REFERENCE NUMERALS

(35) 100 condensate trap 1 first port 1a O-ring 1b opening in the housing 1d connection line 2 second port 2a O-ring 2b opening in the housing 2d connecting line 3 third port 3a O-ring 3b opening in the housing 3d connection line 5 housing A exterior D extension in transverse direction E1 first end area E2 second end area I interior L extension in longitudinal direction 200 blood cassette 201 air port, compressed air port 203 single-needle chamber 205 hydrophobic membrane; hydrophobic filter 300 blood treatment apparatus 301 gas outlet 302 gas inlet 303 single-needle tank 305 compressor 307 condensate collection 309 aeration or de-aeration device 350 control device S902 sensor S903 sensor S904 sensor S905 sensor V901 valve V903 valve