WO2018189333A1

WO2018189333A1 - Body drainage system

Info

Publication number: WO2018189333A1
Application number: PCT/EP2018/059458
Authority: WO
Inventors: Richard KARROUM
Original assignee: Tintron Ab
Priority date: 2017-04-13
Filing date: 2018-04-12
Publication date: 2018-10-18
Also published as: SE1850416A1; SE1750444A1

Abstract

A body drainage system (100) for draining fluid from a body cavity of a patient. The system (100) including a rotatable peristaltic pump mechanism, a housing (115) for housing at least a portion of the peristaltic pump mechanism, a flexible tube (120, 122, 124). The flexible tube (120, 122, 124) is provided with a first and a second cl ip (110, 112), the clips (110, 112) being arranged around the tube circumference and at a distance between each other in the longitudinal direction of the tube (120, 122, 124). A tube pump portion (122) of the tube (120, 122, 124) between the clips (110, 112 ) are intended to be placed in one way only at the peristaltic pump mechani sm making it possible for the rotatable peristaltic mechanism to compress the tube pump portion (122) repeatedly such that pumping occurs in a desired direction only.

Description

BODY DRAINAGE SYSTEM

TECHNICAL FIELD

The present invention relates to a body drainage system for removing body fluids from a patient.

BACKGROUND

In contemporary medical care, the movement of fluid from a body cavity to another point for collection is a routine need and can be performed in a number of ways. When tubing or piping is used for carrying the fluid during the movement either gravity or a pump is utilized to create and/or sustain a suction pressure needed to move the fluid from one point to another.

SUMMARY OF THE INVENTION

At times the removal of fluid from the body must be performed in a gentle, slow and steady manner. Such gentle, slow and steady manner can be designated "peristalsis". Peristaltic pumping may be performed in a number of ways including, but not exclusively, by hand pump or with the use of a peristaltic pump.

In medical care, drainage procedures are typically performed by hand pumping, to achieve the peristaltic movement of excess fluid in a patient's body into drainage bags for disposal or into syringes for laboratory analysis or any other medical use. Hand pumping is time consuming and requires a person to be in attendance at all times. Further, the attendant must manually perform the hand pumping necessary to sustain the peristaltic movement. It is difficult to generate consistent suction forces using hand pumping.

The present application relates to a body drainage system, which may also be called an electric peristaltic pumping device, comprising a pump, a tube, and in particular means to fix the tube, which tube is to be subjected to compression by compression rolls of the pump unit. Such means to fix the tube to the pumping device may be named clips.

Accordingly, there is provided the body drainage system and a method for collection of a bodily fluid, the body drainage system comprising a peristaltic pump unit and a disposable tube assembly comprising a flexible tube and at least one clip configured to attach the tube unit to a housing of the body drainage system.

According to a first aspect there is provided a body drainage system for draining fluid from a body cavity of a patient, the body cavity being provided with an access port, where the system includes a rotatable peristaltic pump unit, a housing. for housing at least a portion of the peristaltic pump unit, a flexible tube unit being a flexible tube, having an access port end connectable to the patient access port, and a collection unit end connectable to a collection unit. The flexible tube is provided with a first and a second clip, where the clips being arranged around the tube circumference and at a distance between each other in the longitudinal direction of the tube. Further, a tube pump portion o the tube between the clips are intended to be placed in one way only making it possible for the rotatable peristaltic pump unit to compress the tube pump portion repeatedly such that pumping occurs in a direction from the access port end towards the collection unit end of the flexible tube. BRIEF DESCRIPTION OF THE DRAWINGS

In order that the manner in which the above recited and other advantages and objects of the invention are obtained will be readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered to be limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:

Fig. la is a perspective view of a body drainage system, with an attached tube but without a pump unit, according to an embodiment of the present invention, Fig. lb is a side view of the body drainage system in Fig. la,

Fig. 2 is a perspective view of the body drainage system in Fig. la with two clips, according an embodiment of the present invention, and the tube separated from the body drainage system,

Fig. 3a is a perspective view of the separated tube and two clips in Fig. 2, Fig. 3b is a detailed view of one clip and a part of the tube in Fig. 3a, Fig. 4 is a top view of the body drainage system with the pump unit, Fig. 5a is a perspective view of the body drainage system in Fig. 4 with a top of the pump unit removed,

Fig. 5b is a top view of the body drainage system in Fig. 5a,

Fig. 6 is a perspective view a body drainage system connected to a collecting unit,

Fig. 7a is a perspective view of a clip according to an embodiment of the present invention, in an unfolded state,

Fig. 7b is a front view of the clip in Fig. 7a,

Fig. 7c is a back view of the clip in Fig. 7a,

Fig. 7d is a side view of the clip in Fig. 7a,

Fig. 7e is another side view of the clip in Fig. 7a,

Fig. 8a is a perspective view of the clip in Fig. 7a in a folded state, Fig. 8b is a front view of the clip in Fig. 8a,

Fig. 8c is a side view of the clip in Fig. 8a,

Fig. 9a is a perspective view of a clip according to an alternative embodiment of the present invention, in an unfolded state,

Fig. 9b is a front view of the clip in Fig. 9a,

Fig. 9c is a back view of the clip in Fig. 9a,

Fig. 9d is a side view of the clip in Fig. 9a,

Fig. 9e is another side view of the clip in Fig. 9a,

Fig. 10a is a perspective view of the clip in Fig. 9a in a folded state, Fig. 10b is a front view of the clip in Fig. 9a, and

Fig. 10c is a side view of the clip in Fig. 9a. DETAILED DESCRIPTION OF EMBODIMENTS

Fig. l a shows a perspective view of a housing 1 1 of a body drainage system, also called a drainage apparatus 100 with attached tubing 120. 122, 124 according to an embodiment of the present invention. As seen in e.g. Fig. 4. the housing 115 houses major components of the apparatus 100, the flexible tube 120, 122, 124, and a pump unit, also called a peristaltic mechanism 130. The pump unit 130 has been removed in Figs 1 and 2, only for the purpose of illustrating the apparatus 100 and the tube 120, 122, 124 more clearly.

To use the drainage apparatus 100 a patient's access port (not shown), which is basically an opening into the patient, to where the tube can be connected to, to collect fluid from the patient with the fluid then running in the tube, is connected to an incoming tube portion 124. The tube, which is flexible and in one piece, has the incoming tube portion 124, a tube pump portion 122, arranged to be affected by the pump unit 130, and an outgoing tube portion 120, which is connected to fluid collecting means 140. The tube 120, 122, 124 is fixed to the apparatus 100 in its operating position by fixation means 110, 112 including a first clip 110, and a second clip 112 that secure the operating position of the flexible tube and secure optimal operating peristaltic conditions for the pump unit 130. In particular, the first and second clips 110, 112 prevent the tube from slipping.

Reusable and disposable parts

The apparatus 100 is thus divided into a reusable part comprising the pump unit 130 and the housing 115, and a disposable part comprising the flexible tube 120, 122, 124, and the first and second clips 110, 112. In an alternative embodiment, the clips could be reusable as well. The disposable part may be provided with means for connecting further tubing and/or fluid collecting means, e.g. a collection bag 140.

Clips

The first clip 110, illustrated in detail in Figs 7 and 8, is configured to be able to be fastened in a first cavity 116 of the housing 115. The second clip 112, illustrated in detail in Figs 9 and 10, is configured to be able to be fastened in a second cavity 117 of the housing 115. On an outside surface, the second clip 112 is preferably provided with mechanical protrusions 351a, 351b, inverted or different in another way in relation to protrusions 31 la, 31 lb of the first clip 110. Corresponding, the second cavity 117 and the first cavity 116 are provided with, to respective protrusion 311a, 311b, 351a, 351b, matching indentations 118, 119, thus, enabling the first clip 110 to be mounted in the first cavity 116 only and the second clip 112 to be mounted in the second cavity 117 only, making it impossible to mount the first clip 110 in the second cavity 117 and the second clip 112 in the first cavity 116. In the illustrated embodiment, the clips 110, 112 are provided with protrusions 311a, 31 lb, 351a, 351b and the cavities provided with indentations 118, 119, but this may in alternative embodiments be the other way around, providing the clips with indentations and the cavities with protrusions, or in any combination suitable for the application.

Having the clips 110, 112 and the cavities 116, 117 designed this way will also secure and safeguard pumping matter in the right and prevent pumping matter in the wrong direction, which is an advantage, in particular if the body drainage system 100 is going to be operated by a patient, who may lack deeper medical and/or technical skills, or who may sometimes be a bit confused due to illness.

Figs 8a-c show the first tube clip 110 of the drainage apparatus 100 in a closed position in three different views: perspective, frontal and side. Fig. 7a-e show the first tube clip 1 10 of the drainage apparatus 100 in an open position in five views: perspective, frontal, back, and two side views. The first tube clip 1 10 is intended for fastening the flexible tube to the peristaltic pump unit 130. The tube clip 110 comprises a first portion 302, a second portion 304, a hinge 306 connecting the first and second portion 302, 304, and a handle 308.

The first portion 302 defines a first longitudinal indentation 310, and the second portion 304 defines a second longitudinal indentation 312. The first 310 and the second 312 indentations are arranged to end up opposite each other when the hinge 306 is closed to be able to clasp around the flexible tube 120, 122, 124. The first indentation 310 is preferably defined by at least two frames, or curved ridges 320, see Fig. 7a, extending perpendicular to the longitudinal direction of the indentation 310. A surface of each curved ridge 320 is intended to face the flexible tube 120, 122, 124 and make contact with the flexible tube, at least when the clip 110 is closed. Each surface has a semi cylindrical shape or a slightly curved shape, with a centre axis coinciding with a longitudinal axis LAI of the first indentation 310.

The second indentation 312 is preferably defined by at least two frames, or curved ridges 322 perpendicular to the longitudinal direction of the indentation 312. A surface of each curved ridge 322 is intended to face the flexible tube 120, 122, 124 and make contact with the flexible tube, at least when the clip 110 is closed. Each surface has a semi cylindrical shape or a slightly curved shape, with a centre axis coinciding with the longitudinal axis LA2 of the second indentation 312.

In an embodiment, the first indentation 310 is preferably defined by at least three ridges 320 and the second indentation 312 is preferably defined by at least two ridges 322, where the ridges 322 of the second indentation 312 are arranged either directly opposite the at least three ridges 320 of the first indentation 310 or slightly offset in the longitudinal direction.

The second tube clip 312, is illustrated in Figs 9-10, where Figs 9a-e illustrated the clip 312 in an open position and Figs lOa-c illustrate the clip 312 in a closed position. The second tube clip 112 is preferably provided with the

corresponding features as the first tube clip 110, having a first portion 342, a second portion 344, a hinge 346 connecting the first and second portion 342, 344, and a handle 348. Similar to the first clip 110, the second clip is also provided with a first longitudinal indentation 350 arranged defined in the first portion 342 and a second longitudinal indentation 352 defined in the second portion 344, arranged to end up opposite each other in a closed state of the clip 112, see Fig. 10c.

The first indentation 350 has several frames or curved ridges 360 extending perpendicular to the longitudinal direction of the indentation 350. A surface of each curved ridge 360 is intended to face the flexible tube 120, 122, 124 and make contact with the flexible tube, at least when the clip 112 is closed. Each surface has a semi cylindrical shape or a slightly curved shape, with a centre axis coinciding with a longitudinal axis LAI' of the first indentation 350. The second indentation 352 also has several frames or curved ridges 362 perpendicular to the longitudinal direction of the second indentation 352. A surface of each curved ridge 362 is intended to face the flexible tube 120, 122, 124 and make contact with the flexible tube, at least when the clip 112 is closed. Each surface has a semi cylindrical shape or a slightly curved shape, with a centre axis coinciding with the longitudinal axis LA2' of the second indentation 352. The ridges 362 of the second indentation 352 are arranged either directly opposite the ridges 360 of the first indentation 350 or slightly offset in the longitudinal direction.

The tube clips 110, 112 could be provided with a piece of magnetic material or a magnet 514a, 514b, 515a, 515b for enabling a sensor 510, 512, arranged in the cavity 116, 117 of the housing 115, to sense the presence of the clips 110, 112.

The clips 110, 112 form part of a body drainage system 100 for draining fluid from a cavity of the patient, where the cavity being provided with the access port, the connection to the tube as explained above. In an embodiment, the system comprises the clips together with

- a rotatable peristaltic pump unit, also called a peristaltic mechanism. 130 ,

- a housing 1 15 for housing at least a portion of the peristaltic pump unit 130. - a flexible tube unit comprising a flexible tube 120, 122, 124 having an access port end 144 connectable to the patient access port, and a collection unit end 142 connectable to fluid collecting means, e.g. a collection unit 140.

The flexible tube 1 20. 122, 1 24 is provided with the first and the second cl ip 1 10, 1 12. the cl ips 1 10, 1 12 being arranged around the tube 1 20. 1 22. 1 24. circumference and at a distance D l between each other in the longitudinal direction of the tube 1 20. 122. 124. The distance D I between the cl ips 1 10, 1 12 constitutes a tube pump portion 122 of the tube between the cl ips 1 10, 1 12 and are intended to be placed in one way only, at the peri staltic pum unit 130, making it possible for rotatable peristaltic mechanism, e.g. rolls 134, of the peristaltic pum unit 130 to compress the tube pump portion 122 o the flexible tube repeatedly such that pumping occurs in a direction from the access port end 144 towards the col lection unit end 142 of the flexible tube.

The housing 115 is provided with a first indentation or cavity 116 and a second indentation or cavity 117 intended to house the first and second clip 110, 112 respectively. The first cavity 116 and the first clip 110 are configured to cooperate such that the first clip 110 can, easily, by hand be brought or pushed into the first cavity 116 to firmly stay there during pumping.

The second cavity 117 and the second clip 112 are configured to cooperate such that the second clip 112 can be easily by hand brought or pushed into the second cavity 117 to firmly stay there during pumping.

The first clip 110 has an outer shape not corresponding to the inner surface of the second cavity 117 thus, making it impossible to fit the first clip 110 into the second cavity 117. The outer shape of the first clip 110 may be asymmetrical.

The second clip 112 has an outer shape not corresponding to the inner surface of the first cavity 116 thus, making it impossible to fit the second clip 112 into the first cavity 116. The outer shape of the second clip 112 may be mirror shaped of the first clip 110.

Each clip 110, 112 may be provided with a handle 308, 348 for easy gripping between thumb and index finger.

The body drainage system 100 may be provided with one or more sensors 510, 512 for detecting the presence of the flexible tube 120, 122, 124 in a position to be compressed by rolls 134 of the peristaltic pump unit 130 to pump matter in a correct direction.

The body drainage system 100 may be provided with at least first inductive sensor 510 adjacent to the first cavity 116 and at least a second inductive sensor 512 adjacent to the second cavity 117. Further, the clips 110, 112 may be provided with magnetic material or one or more magnets 514a, 514b, 515a, 515b for influencing the first and second inductive sensors 510, 512.

The body drainage system 100 may further be provided with circuitry configured to receive signal from the one or more sensors 510, 512 and to process that information.

Also, the body drainage system 100 may be configured to output signals indicating mounting status of first and second clips 110, 112 into the cavities 116, 117. The body drainage system 100 may be configured to inhibit pumping when sensors 510, 512 indicate that the tube 120, 122, 124 or a clip 110, 112 is not in correct position.

Tube assembly

The tube 120, 122, 124 and clips 110, 112 as described above may preferably be combined in a tube assembly, such tube assembly comprising

- a flexible tube 120, 122, 124 having

- an access port end 144 connectable to a patient access port (not shown), and

- a collection unit end 142 connectable to a collection unit 140,

the tube unit comprising connectable to:

- a first clip 110 comprising a first portion 302 and a second portion 304 and wherein the first and second portions 302, 304 are joined by a hinge 306 such that they can clasp around the tube 120, 122, 124 when closed.

The tube assembly is further connectable to a second clip 112. The second clip 112 having, similar to the first clip 110, a first portion 342 and a second portion 344 and wherein the first and second portions 342, 344 are joined by a hinge 306 such that they can clasp around the tube 120, 122, 124 when closed.

The first and second clip 1 10.1 12 are arranged a distance D 1 apart along the flexible tube 120, 122, 124 and wherein the first clip 1 10 has an outer shape not being consistent with an outer shape of the second clip 112, to avoid mix-up mistakes and to facilitate the mounting of the two clips 110, 112. The distance Dl is predetermined to allow compression rolls 134 of a peristaltic pump unit 130 to cooperate with a tube portion 122 between the clips 110, 112.

The clips 110, 112 may be provided with magnetic material or magnet(s) 514a, 514b, 515a, 515b in order to allow for detection by the drainage apparatus 100.

Below are different possible aspects of the invention defined. A first aspect of the invention is defined by a tube clip for fastening a flexible tube to a peristaltic pump unit, the clip comprising:

- a first portion;

- a second portion;

- a hinge connecting the first and second portion;

wherein the first portion is provided with a first longitudinal indentation, and that the second portion is provided with a second longitudinal indentation, and wherein the first and second indentations are arranged to end up opposite each other when the hinge is closed to be able to clasp around a flexible tube.

The first indentation may be made up of at least two frames perpendicular to the longitudinal direction of the indentation, and wherein a surface of each frame intended to face and make contact to the flexible tube is semi cylindrical in shape, with a centre axis coinciding with the longitudinal axis.

The first indentation may further be made up of at least three frames and the second indentation is made up of at least two frames and wherein the frames of the second indentation is arranged directly opposite the at least three frames of the first indentation or slightly disposed in the longitudinal direction.

The frames of the second indentation may be slightly disposed in the longitudinal direction in relation to the frames of the first indentation.

Further, the clip is provided with a piece of magnetic material for enabling a sensor of the peristaltic tube unit to sense presence of the clip.

The clip may also be provided with a permanent magnet for enabling a sensor of the peristaltic tube unit to sense presence of the clip.

A second aspect of the invention is defined by a body drainage system for draining fluid from a body cavity of a patient, the body cavity being provided with an access port, wherein the system comprises

- a rotatable peristaltic pump mechani sm ,

- a housi ng for housi ng at least a portion of the peri staltic pump mechani sm. - a flexible tube unit comprising a flexible tube having an access port end

connectable to the patient access port, and a collection unit end connectable to a collection unit,

wherein the flexible tube of the fle ible tube unit is provided with a first and a second clip, the clips being arranged around the tube circumference and at a distance between each other in the longitudinal direction of the tube and wherein a tube pump portion of the tube between the clips are intended to be placed in one way only at peristaltic pump mechanism making it possible for the rotatable peristaltic mechanism to compress the pump portion o the flexible tube unit repeatedly such that pumping occurs in a direction from the access port end towards the collection unit end o the flexible tube.

The housing may in an embodiment be provided with a first indentation and a second indentation, wherein the first indentation and the first clip is configured to cooperate such that the first clip can, easily, by hand be brought or pushed into the first indentation to firmly stay there during pumping.

The second indentation and the second clip may be configured to cooperate such that the second clip can be easily by hand brought or pushed into the second indentation to firmly stay there during pumping.

Further, the first clip may be configured with an outer shape not being consistent with the inner surface of the second indentation thus making it impossible to fit the first clip into the second indentation.

Further, the second clip may be configured with an outer shape not being consistent with the inner surface of the first indentation thus making it impossible to fit the second clip into the first indentation.

In an embodiment, the outer shape of the second clip is the mirror shape of the first clip.

In an alternative embodiment, each clip is provided with a handle for gripping between thumb and index finger.

Further, the body drainage system may be provided with one or more sensors for detecting the presence of a flexible tube in a position to be compressed by the rolls of the peristaltic pump to pump matter in a correct direction.

The housing may in one embodiment be provided with a first inductive sensor adjacent to the first indentation and wherein the housing further is provided with a second inductive sensor adjacent to the second indentation, and wherein the clips are provided with magnetic material or one or more magnets for influencing the first and second inductive sensors.

The body drainage system according may further be provided with circuitry configured to receive signal from the one or more sensors and to process that information.

The system may yet further be configured to output signals indicating mounting status of first and second clips into the indentations.

In an embodiment, the system is configured to inhibit pumping when sensors indicate that tube or clip is not in correct position.

A third aspect of the invention is defined by a tube assembly comprising:

- a flexible tube having

- an access port end connectable to a patient access port, and

- a collection unit end connectable to a collection unit,

the tube unit further comprises

- a first clip comprising a first portion and a second portion and wherein the first and second portions are joined by a hinge such that they can clasp around the tube when closed;

The tube assembly according may also comprise a second clip and wherein the second clip comprises a first portion and a second portion and wherein the first and second portions are joined by a hinge such that they can clasp around the tube when closed.

In an embodiment, the first and second clip are arranged a distance apart along the flexible tube and wherein the first clip is configured with an outer shape not being consistent with an outer shape of the second clip, to avoid mix-up mistakes.

In another embodiment, the clips are provided with magnetic material or magnet(s)

A fourth aspect of the invention is defined by a kit of parts suitable for the drainage of a body fluid from a patient, the kit comprising:

- a peristaltic pump unit, having a peristaltic mechanism, and first fixation means for a flexible tube tubing;

- a length of drainage tubing having a second fixation means for cooperating with the first fixation means of the peristaltic pump unit in order to keep the drainage tubing in position during pumping;

Finally, although the inventive concept has been described above with reference to specific embodiments, it is not intended to be limited to the specific form set forth herein. Rather, the invention is limited only by the accompanying claims. Other embodiments than the specific above are equally possible within the scope of these appended claims.

Claims

1. A body drainage system for draining fluid from a body cavity of a patient, the body cavity being provided with an access port, wherein the system comprises - a rotatable peristaltic pump unit (130) ,

- a housing (115) for housing at least a portion of the peristaltic pump unit (130),

- a flexible tube unit comprising a flexible tube (120, 122, 124) having an access port end (144) connectable to the patient access port, and a collection unit end (142) connectable to a collection unit (140),

wherein the flexible tube (120, 122, 124) is provided with a first and a second clip (110, 112), the clips (110, 1 12 ) being arranged around the tube

circumference and at a distance ( D I ) between each other in the longitudinal direction of the tube (120, 122. 124) and wherein a tube pump portion (122) o the tube (120, 122, 124) between the clips (110, 1 12) are intended to be placed in one way only making it possible for the rotatable peristaltic pump unit (130) to compress the tube pump portion (122) repeatedly such that pumping occurs in a direction from the access port end (144) towards the collection unit end (142) o the flexible tube (120, 122, 124). 2. The body drainage system according to claim 1 wherein the housing

(115) is provided with a first cavity (116) and a second cavity (117), wherein the first cavity (116) and the first clip (110) is configured to cooperate such that the first clip (110) can, easily, by hand be brought or pushed into the first cavity (116) to firmly stay there during pumping.

3. The body drainage system according to claim 2 wherein the second cavity (117) and the second clip (112) is configured to cooperate such that the second clip (112) can, easily, by hand be brought or pushed into the second cavity (117) to firmly stay there during pumping.

4. The body drainage system according to claim 2 wherein the first clip (110) has an outer shape being different from an inner surface of the second cavity (117), making it impossible to fit the first clip (110) into the second cavity (117).

5. The body drainage system according to claim 4 wherein the second clip (112) has an outer shape being different from an inner surface of the first cavity

(116), making it impossible to fit the second clip (112) into the first cavity (116).

6. The body drainage system according to any one of the preceding claims, wherein an outer shape of the second clip (112) is the mirror shape of an outer shape of the first clip (110). 7. The body drainage system according to any one of the preceding claims, wherein each clip (110, 112) is provided with a handle (308; 348) for gripping between thumb and index finger.

8. The body drainage system according to any one of the preceding claims, wherein the system (100) is provided with one or more sensors (510, 512) for detecting the presence of the flexible tube (120, 122, 124) in a position to be compressed by the rotatable peristaltic pump unit (130) to pump matter in a correct direction. 9. The body drainage system according to any one of the claims 2-8, wherein the housing (115) is provided with a first inductive sensor (510) adjacent to the first cavity (116), and wherein the housing (115) further is provided with a second inductive sensor (512) adjacent to the second cavity (117), and wherein the clips (110, 112) are provided with magnetic material or one or more magnets (514a, 514b, 515a, 515b) for influencing the first and second inductive sensors (510, 512).

10. The body drainage system according to claim 8 or 9, wherein the system (100) is provided with circuitry configured to receive signal from the one or more sensors (510, 512) and to process that information.

11. The system according to claim 10 wherein the system (100) is configured to output signals indicating mounting status of first and second clips (110, 112) into the first and second cavity (116, 117).

12. The system according to claim 10 or 11 wherein the system (100) is configured to inhibit pumping when the one or more sensors (510, 512) indicate that said tube (120, 122, 124) or said clip (110, 112) is and/or is not in the correct position.