DE102019109811A1 - Roller pump with holding sections for fixing a pump hose segment - Google Patents

Abstract

The present invention relates to a roller pump (100) which has a rotor (110) and a stator (120). The rotor (110) has an axis of rotation and has one or more rollers (111). The stator comprises a pressure wall (121) which surrounds the rotor (110) at least in sections, forming a pump bed (123). The pump bed (123) is provided and / or configured to receive a pump hose segment (131) of a hose (130) between an inner side (121i) of the pressure wall (121) and the rotor (110). In addition, the roller pump has at least one first holding section (125a) for laterally delimiting, for releasably holding and / or for releasably securing a first section of the hose (130). This serves to guide the hose (130) or its pump hose segment (131) on an outer side (121a) of the pressure wall (121), radially to the pressure wall (121) and / or at a greater distance from the axis of rotation of the rotor (110) than any section of the pump bed (123).

Description

The present invention relates to a roller pump according to claim 1. It also relates to a medical hose set according to claim 8, also a medical treatment device according to claim 10, a medical treatment system according to claim 12 and a method for filling and / or priming according to claim 14.

Roller pumps are known from practice which can be used to convey a fluid, in particular a medical fluid, through a hose or line system.

An object of the present invention is to propose a further roller pump. In addition, a medical hose set, a medical treatment device and a medical treatment system are to be proposed in connection with such a roller pump. Finally, a method for filling and / or priming should be specified.

The object according to the invention is achieved by a roller pump with the features of claim 1. It is also achieved by a medical hose set with the features of claim 8, a medical treatment device with the features of claim 10 and by a medical treatment system with the features of claim 12. In addition, it is made by a method for filling and / or priming with the Features of claim 14 solved.

According to the invention, a roller pump is therefore proposed which has a rotor, a stator and at least one holding section for a section of a hose, which is referred to herein as the first section.

The rotor has an axis of rotation and one, two or more rollers which rotate around the axis of rotation when the roller pump is in operation.

The stator has a pressure wall which surrounds the rotor, at least in sections, at a distance from the rotor or its rollers, and by means of this distance forms a pump bed.

The pump bed is in turn provided and / or configured to accommodate the pump hose segment of the hose between an inside of the pressure wall and the rotor.

By means of the first holding section of the roller pump according to the invention, the first section of the hose is laterally limited, held and / or fixed on an outside of the pressure wall. This is done in a solvable way. The first holding section and / or the first section of the hose inserted therein is located radially of the pressure wall and / or at a greater distance from the axis of rotation of the rotor than any section of the pump bed.

A medical hose set with at least one hose (alternatively: line) is also proposed. The hose has a pump hose segment. The pump hose segment is directly or indirectly adjoined by a fixing section of the hose, which is used to detachably fix or hold the pump hose segment in a first holding section of the roller pump according to the invention or a medical treatment device.

The outer diameter or the outer circumference of the fixing section tapers or at least partially decreases in the direction of the pump tubing segment.

A medical treatment device with a roller pump according to the invention and a pressure measuring point is also proposed. In the area of the pressure measuring point, an insert section is provided, configured to receive an insert element of the hose. The hose section is not the pump hose segment or the aforementioned fixing section, and / or the insertion section is not part of the stator.

A medical treatment system is also proposed which comprises a treatment device according to the invention and a hose set according to the invention. The hose set has a hose, which in turn is connected to or has a pump hose segment. The pump tubing segment is provided and / or configured to be inserted into the roller pump of the medical treatment device.

• - Bereitstellen einer erfindungsgemäßen medizinischen Behandlungsvorrichtung;
• - Einlegen des ersten Abschnitts des Schlauchs in den ersten Halteabschnitt; und
• - Füllen und/oder Primen des Schlauchs mit einer, insbesondere medizinischen, Flüssigkeit.

Finally, a method for filling and / or priming (alternatively: rinsing) a medical tubing set, comprising a tubing and a pump tubing segment, in particular as set out above, is described. The procedure consists of the following steps:

• - Provision of a medical treatment device according to the invention;
• - Inserting the first section of the hose into the first holding section; and
• - Filling and / or priming the tube with a, in particular medical, liquid.

Advantageous further developments of the present invention are each the subject matter of subclaims and embodiments.

In all of the following statements, the use of the expression “can be” or “may have” etc. is to be understood as synonymous with “is preferably” or “preferably” etc. and is intended to explain embodiments according to the invention.

Whenever numerical words are mentioned here, the person skilled in the art understands them to indicate a numerically lower limit. If this does not lead to a contradiction that is noticeable to the person skilled in the art, the person skilled in the art therefore always reads “at least one” or “at least one” when indicating “a” or “an”. This understanding is also encompassed by the present invention, as is the interpretation that a numerical word such as “a” can alternatively be meant as “exactly one” wherever this is technically possible for the person skilled in the art. Both are encompassed by the present invention and apply to all numerical words used herein.

If the person skilled in the art has doubts, the information “above” and “below” are to be understood here as absolute or relative spatial information relating to the orientation of the component in question during its normal use.

Whenever an embodiment is mentioned herein, it is an exemplary embodiment according to the invention.

Embodiments according to the invention can have one or more of the features mentioned above or below. The features mentioned herein can be the subject of embodiments according to the invention in any combination, provided the person skilled in the art does not recognize a specific combination as technically impossible.

In some embodiments, the roller pump according to the invention has a second holding section. The second holding section allows a fixing section of the tubing, in particular releasably, to be held or fixed when the pump tubing segment is inserted into the pump bed. The second holding section is here arranged in such a way that a movement of the pump tube segment along the pump bed in the direction of rotation of the rotor is limited or prevented.

In some embodiments, the fixation portion is the first portion of the tube. In some embodiments this is not the case.

In some embodiments, the fixing section is a connecting piece that connects two hose ends of different diameters to one another in a fluid connection - indirectly or directly.

In some embodiments, the fixing section connects the pump hose segment to a further hose section.

In some embodiments, the roller pump according to the invention has a third and optionally further holding sections, which are provided to laterally limit, hold or fix, in particular releasably, a second section and / or further sections of the hose on an outside of the pressure wall. Here, too, the limited or held section of the hose and / or the holding section used is located radially to the pressure wall and / or at a greater distance from the axis of rotation of the rotor than any section of the pump bed.

In some embodiments, the roller pump according to the invention has a fourth holding section. The fourth holding section allows a further fixing section of the tube, in particular releasably, to be held or fixed when the pump tube segment is inserted into the pump bed. The fourth holding section is here arranged in such a way that a movement of the pump tube segment along the pump bed, in particular in the direction of rotation of the rotor, is limited or prevented.

In some embodiments of the roller pump according to the invention, at least one of the above-mentioned holding sections is defined on the one hand by the inside or the outside of the pressure wall or an extension thereof and on the other hand by a projection, an elevation or a fin. The projection, elevation or fin can optionally be arranged closer to a center of rotation of the roller pump than the holding section considered.

In some embodiments, at least one of the above-mentioned holding sections of the roller pump according to the invention is designed as a pin and / or in the shape of a mushroom. A mushroom shape is given when the elevation has a base and a free end, the base having a smaller circumference and / or diameter than the free end.

In some embodiments of the roller pump according to the invention, a further holding section is used for laterally limiting, for releasably holding or for releasably securing a further hose of the hose set, this hose not being the aforementioned Pump tubing segment is. Here, too, the held section of the hose is located radially to the pressure wall and / or at a greater distance from the axis of rotation of the rotor than any section of the pump bed.

In some embodiments, the fixing section of the hose set according to the invention has at least three mutually different outer diameters or outer circumferences.

These outer diameters or outer circumferences are also referred to herein as the first, second and third outer diameter / circumference. In this case, the first outside diameter is optionally larger than the second outside diameter, which in turn is larger than the third.

Optionally, the third outer diameter is arranged closer to the pump tube segment than the second, which in turn is arranged closer to the pump tube segment than the third outer diameter. Whenever an outer diameter is mentioned here, it is also possible to exchange this term for the term outer circumference.

In some embodiments, the treatment device according to the invention is suitable and / or configured for performing a hemodialysis, a hemofiltration, a hemodiafiltration or a separation method.

In some embodiments of the treatment system according to the invention, the hose has an insert element which is inserted into an insert section of the treatment device adjacent to the pressure measuring point. At the same time, the first section of the hose is inserted into the first holding section.

In some embodiments, the filling and / or the priming / rinsing of the method according to the invention takes place while the hose is inserted into the insertion section in the area of the pressure measuring point by means of its insertion element.

In some embodiments, the length of the hose between the fixing section and the insert element is at least 180 mm.

In some embodiments, the insert element is an element which at least partially surrounds the tube or its lumen and is designed to hold the tube in the insert section. It can be a holding element that, for. B. is made as a plastic part. It can preferably be made of a different material than the hose.

• - Entnehmen des ersten, mit der, insbesondere medizinischen, Flüssigkeit gefüllten Abschnitts des Schlauchs aus dem ersten Halteabschnitt; und
• - Einlegen des Pumpschlauchsegments in das Pumpbett.

In some embodiments, the method according to the invention comprises the further steps:

• Removing the first section of the tube filled with the, in particular medical, liquid from the first holding section; and
• - Insertion of the pump tubing segment into the pump bed.

In some embodiments, the pump bed can be limited to that area of the stator in which the pump can exert a conveying effect on the pump hose segment by means of a roller, acting in the direction of rotation. Sections of the roller pump in which no conveying activity can be carried out on the inserted pump tube segment by means of the rollers do not count as a pump bed in these embodiments.

In some embodiments, the pump bed extends in a concavely curved manner along the inside of the pressure wall.

In some embodiments, the pump bed is provided on the side of the stator facing the rotor and / or between a stator exterior and a rotor exterior.

In some embodiments, the section of the hose that is inserted into the second holding section and optionally also into the first holding section is a fixing section with at least two different diameters, optionally with three different diameters.

In some embodiments, the lumen of the pump tubing segment is in fluid communication with a lumen of the fixation section.

In some embodiments, the first portion and the fixing portion can be identical to one another.

Some or all of the embodiments according to the invention can have one, more or all of the advantages mentioned above and / or below.

With the roller pump according to the invention, it is advantageously possible to equip a medical hose (or hose line) for blood, dialysate or filtrate or as a substituate line on a medical treatment device, in particular for extracorporeal blood treatment, in the dry state. The dry state here means that the hose is only filled with a medical liquid, in particular a Priming liquid, filled and / or rinsed. During this rinsing process, the hose to be rinsed is not occluded. This allows the fluid to flow freely through the entire medical tubing. For this purpose, a different pump than the roller pump described here is used as the conveying means. Air pockets, buildup on inner walls of the tube and the like are flushed away better with the procedure described here than with flushing the tube and in particular the pump tube segment by means of the occluding roller pump. This advantage can be achieved with the roller pump according to the invention, in which the pump hose segment is temporarily attached to the stator outside the pump bed for filling or priming.

A structurally complex design of a roller pump, which has, for example, radially retractable rollers, which only occlude the pump tube segment of the medical tube when it has already been filled with medical fluid and rinsed, is omitted. This saves manufacturing costs. In addition, time and costs for maintenance can be saved.

With the roller pump according to the invention, a dry upgrade of a medical tube can thus be carried out simply and cost-effectively.

• 1 zeigt schematisch vereinfacht Abschnitte einer erfindungsgemäßen Behandlungsvorrichtung in einer beispielhaften Ausführungsform;
• 2 zeigt eine erfindungsgemäße Rollenpumpe mit im Pumpbett eingelegtem Pumpschlauchsegment (Pumpposition) in einer exemplarischen Ausführungsform von vorne;
• 3 zeigt die erfindungsgemäße Rollenpumpe der 2 mit in einer Spülposition eingelegtem Pumpschlauchsegment des Schlauchs von vorne;
• 4 zeigt einen Fixierabschnitt, wie er in 2 und 3 gezeigt ist, von der Seite; und
• 5 zeigt die erfindungsgemäße Rollenpumpe der 2 ohne Schlauch in Perspektive von oben.

The present invention is explained below by way of example with reference to the accompanying drawing, in which the same reference symbols denote the same or similar components. In the figures:

• 1 shows schematically simplified sections of a treatment device according to the invention in an exemplary embodiment;
• 2 shows a roller pump according to the invention with a pump hose segment (pump position) inserted in the pump bed in an exemplary embodiment from the front;
• 3 shows the roller pump according to the invention of 2 with the pump tubing segment of the tubing inserted in a rinsing position from the front;
• 4th shows a fixing section as shown in 2 and 3 is shown from the side; and
• 5 shows the roller pump according to the invention of 2 without hose in perspective from above.

1 shows an extracorporeal blood circuit 1 , which for a treatment by means of double-needle access, or using, e.g. B. an additional Y-connector, by means of single-needle access, would be connected to the vascular system of the patient, not shown. The bloodstream 1 is optionally in sections thereof in or on a blood cassette 2 in front. This blood cassette 2 is optionally designed to be used in other types of treatment, for example a single needle treatment.

The bloodstream 1 has an arterial patient hose clamp 6th and an arterial connection needle 5 (as an example of an access device) of an arterial section or an arterial patient line or blood collection line 9 on. The bloodstream 1 also includes a venous patient hose clamp 7th and a venous connection needle 27 (as an example of a further or second access device) of a venous section or a venous patient line or blood return line 23 on.

A blood pump 11 is in the arterial section 9 provided a substituate pump 17th is with a substituate line 17a connected. The substituate line 17a can by means of a, preferably automatic, substituate port 18th be linked to a source of substituate. Using the substituate pump 17th can substitute by predilution or by postdilution via associated lines 13 or. 14th in line sections, for example in the arterial section 9 or in a venous section 23a (between a blood chamber 19a a blood filter 19th and a venous air separation chamber 21st ) of the bloodstream 1 be introduced.

The blood filter 19th assigns those with the arterial section 9 and with the venous section 23a connected blood chamber 19a on. A dialysate chamber 19b of the blood filter 19th is with one to the dialysate chamber 19b leading dialysis fluid supply line 31a and one from the dialysate chamber 19b leading away dialysate drain line 31b connected.

The dialysis fluid supply line 31a optionally has a valve V24 by means of which the flow within the dialysis fluid supply line 31a can be prevented. The dialysate drain line 31b optionally has a valve V25 on, by means of which the flow within the dialysate drain line 31b can be prevented.

• 1 zeigt ferner einen arteriellen Luft-Blut-Detektor 15, einen venösen Substituat-Blut-Detektor 25 sowie Drucksensoren 33a, b.

The dialysis fluid supply line 31a is also optional by means of a further, machine-internal valve with a compressed air source 26th connected. The compressed air source 26th can be part of the treatment device 4th be or separate therefrom. Downstream of the compressed air source 26th can be a pressure sensor 37 be provided.

• 1 also shows an arterial air-blood detector 15th , a venous substituate blood detector 25th as well as pressure sensors 33a , b .

1 shows the treatment device according to the invention 4th very schematic. In particular, it does not show their housing. The roller pump according to the invention 100 , which is intended mostly to be provided on the housing, is therefore assumed 1 not out.

2 shows a roller pump according to the invention 100 in an exemplary embodiment in a pump position of the hose from the front.

The roller pump 100 is on a side surface of the treatment device 4th attached and has a rotor 110 with three roles here as an example 111 on, in use around an axis of rotation of the rotor 110 be moved around. The rotor 110 is inside a stator 120 intended.

The stator 120 has a pressure wall 121 with an outside 121a and an inside 121i on. Between the inside 121i and sections of the rotor 110 there is a gap, which acts as a pump bed 123 the inclusion of a pump tubing segment 131 a hose 130 a hose set is used.

In the in 2 The pump hose segment shown is the pump tube segment 131 into the pump bed 123 recorded and is in operation of the roller pump 100 of which alternate with the pump tubing segment 131 engaging roles 111 first touched and then against the inside 121i the pressure wall 121 pressed. This pressing causes the lumen of the pump tubing segment to be occluded 131 by the action of the respective role in engagement 111 against the pressure wall 121 . By moving the roll 111 in the direction of rotation (here: clockwise when looking at 2 ) will be located in the pump tubing segment 131 located liquid in the circumferential direction and in the direction of rotation along the pump tubing segment 131 promoted.

The roller pump 100 , and especially their stator 120 , have a first holding portion 125a and a second holding portion 125b on. Both are configured to - at different times - sections of the hose 130 to hold or to fix in its position.

In the in 2 The pump hose segment shown is the pump tube segment 131 of the hose 130 by means of a fixing section 133 thereby on the stator 120 held that the fixing section 133 in the second holding section 125b is inserted. Holding or fixing can be used here as preventing a slipping through or a movement of the entire pump tubing segment 131 in the conveying direction of the roller pump 100 (i.e. in the direction of rotation) when the rollers 111 occlude and the rotor 110 keeps turning, to be understood.

The first holding section 125a is in the example 2 as a space between the outside 121a the pressure wall 121 or an extension of this on the one hand and an elevation, here exemplified as a Finn 127 is shaped, on the other hand configured. The fixing section can be in this space 133 of the hose 130 be inserted. The limited space between outside 121a (or an extension thereof) and fin 127 can slide in upstream of the roller pump 100 located sections of the hose 130 optionally prevent.

The second holding section 125b is in the example 2 as a space between the inside 121i the pressure wall 121 or an extension thereof and a survey 126 designed. The fixing section can be in this space 133 of the hose 130 be inserted. The limited space between inside 121i (or an extension thereof) and collection 126 prevents sliding in upstream of the roller pump 100 located sections of the hose 130 into the pump bed 123 .

The function of the first holding section 125a is off 3 evident.

The function of the second holding section 125b is off 2 can be seen and is made with reference to 3 further explained.

Optionally, the roller pump 100 a third holding section 125c on, like the first holding section 125a can be designed and / or act.

Optionally, the roller pump 100 a fourth holding section 125d on that like the second holding section 125b can be designed and / or act.

The pump tubing segment 131 can have one or more sections which are in the first and / or in the second holding section 125a , 125b be determined.

In some embodiments, these two sections are identical to one another or coincide, as exemplified here with the fixing section 133 the case is.

The fixing section 133 can be a sleeve or a connector, preferably an injection-molded part made of plastic.

Under a holding section 125a , 125b can be a machine-side recording or a Machine-side abutment for the first section 130 or the fixing section 133 be understood. A holding section can represent a cross-sectional limitation or a constriction which the fixing section 133 and thus the pump tubing segment connected to it 131 at a slide in or within the pump bed 123 prevents or limits such movement.

2 also shows that the upstream of the fixing section 133 to the pump tubing segment 131 continuing hose 130 another insert element 135 may have, by means of which the hose 130 is releasably fixed in the area of a pressure measuring point, not shown, in an insert section, also not shown.

The length of the hose 130 between fixing section 133 and the insert element 135 is preferably determined such that the fixing portion 133 without the user exerting significant forces, but above all without being damaged, optionally in the first holding section 125a or in the second holding section 125b can insert. For use of the hose set according to the invention on conventional treatment devices, the inventors determined that this length is at least 180 mm as an optimal value.

Downstream of the pump tubing segment 131 can the hose 130 end open to the fluid delivered in it z. B. to dispose of in a sink, especially if it is the roller pump 100 is an ultrafiltration pump.

3 shows the roller pump according to the invention 100 of the 2 in a rinsing position of the hose 130 from the front. The pump tubing segment is in the rinsing position 131 not in the pump bed 123 . It is therefore not occluded, which favors its residue-free flushing. The pump tubing segment is used in the rinsing position 131 not for conveying fluids by means of the rotor 110 but it can itself be flushed through by means of conveying means not discussed here, for example with priming or rinsing liquid.

It can be seen that the first holding section 125a can serve the first section of the hose 130 , the example of the fixing section 133 corresponds to the stator 120 to secure.

4th shows a fixing section 133 like him in 2 and 3 is shown from the side.

The fixing section 133 can have a first outer diameter 133a , a second outside diameter 133b and a third outside diameter 133c exhibit.

Here is the first outside diameter 133a larger than the second outside diameter 133b , which in turn is larger than the third outer diameter 133c is. Purely by way of example, therefore, the fixing section tapers 133 in the flow direction or reduces its diameter in this direction, in particular in stages.

5 shows the roller pump according to the invention 100 of the 2 without hose in perspective from above.

An optional, further holding section can be seen 125e , which can be used to accommodate a further hose or hose section that is not the pump hose segment 131 must act. As a result, the further holding section 125e be designed to match a diameter or circumference of the further hose, for example in order to clamp it, etc.

The position of the optional, further holding section 125e , on the stator 120 is not restricted. In the 5 Shown embodiment, in which the further holding portion 125e , at an upper area of the further holding section 125e , outside the pressure wall 121 is provided and also to hold both the pump tubing segment 131 as well as the further hose is purely exemplary.

List of reference symbols

1

extracorporeal blood circulation

2

Blood cassette

4th

Blood treatment device

5

Access device, such as an arterial connection needle

6th

arterial patient hose clamp

7th

venous patient hose clamp

9

arterial section or arterial patient line or arterial blood collection line

11

Blood pump

13

Addition point for substituate (predilution)

14th

Addition point for substituate (post-dilution)

15th

arterial air-blood detector

17th

Feeding device, for example a substituate pump

17a

Substituate line

18th

automatic substituate port

19th

Blood filter

19a

Blood chamber

19b

Dialysate chamber

21st

venous air separation chamber

23

venous section or venous patient line or venous blood return line

23a

venous section

25th

venous substituate blood detector

26th

Compressed air source

27

Access device, such as a venous connection needle

29

Control and regulating device

31a

Dialysis fluid supply line

31b

Dialysate drain line

33a

Pressure sensor

33b

Pressure sensor

35

Single needle valve

36

Single-needle chamber

37

Pressure sensor

V24

Valve

V25

Valve

100

Roller pump

110

rotor

111

Role, roles

120

stator

121

Pressure wall

121a

Outside

121i

inside

123

Pump bed

125a

first holding section

125b

second holding section

125c

third holding section

125d

fourth holding section

125e

further holding section

126

Elevation

127

fin

130

tube

131

(Pump) hose segment

133

Fixing section

133a

first outside diameter

133b

second outside diameter

133c

third outside diameter

135

Insert element

Claims (16)

Roller pump (100) with - A rotor (110) with an axis of rotation and with one or more rollers (111); - A stator (120) with a pressure wall (121) which surrounds the rotor (110) at least in sections to form a pump bed (123), the pump bed (123) for receiving a pump tube segment (131) of a tube (130) between a Inside (121i) of the pressure wall (121) and the rotor (110) is provided and / or configured; and - At least one first holding section (125a) for laterally delimiting, releasably holding and / or releasably securing a first section of the hose (130) on an outer side (121a) of the pressing wall (121), radially to the pressing wall (121) and / or at a greater distance from the axis of rotation of the rotor (110) than any section of the pump bed (123). Roller pump (100) Claim 1 , further comprising a second holding section (125b) for releasably holding or fixing a fixing section (133) of the tube (130) in the second holding section (125b) when the pump tube segment (131) is inserted into the pump bed (123), the second holding section (125b) is arranged to limit or prevent a movement of the inserted pump tube segment (131) along the pump bed (123) in the direction of rotation of the rotor (110). Roller pump (100) according to one of the preceding claims, further comprising a third holding section (125c), and optionally further holding sections, in each case for lateral delimitation, for releasably holding and / or for releasably securing a second section of the hose (130) on an outside ( 121a) the pressure wall (121), radial to the pressure wall (121) and / or at a greater distance from the axis of rotation than any section of the pump bed (123). Roller pump (100) according to one of the preceding claims, further comprising a fourth holding section (125d) for releasably holding or fixing a further fixing section of the hose (130) in the fourth holding section (125d) when the pump hose segment (131) is in the pump bed (123) is inserted, wherein the second holding section (125b) is arranged in order to move the inserted pump tube segment (131) along the pump bed (123), in particular in Direction of rotation of the rotor (110) to limit or prevent. Roller pump (100) according to one of the preceding claims, wherein at least one of the first to fourth holding sections (125a, 125b, 125c, 125d) between the inside (121i) or the outside (121a) of the pressing wall (121) or an extension thereof and on the other hand a projection, an elevation (126) and / or a fin (127) is designed. Roller pump (100) according to one of the preceding claims, wherein at least one of the first to fourth holding sections (125a, 125b, 125c, 125d) is designed as a pin or a mushroom shape, with a base and a free end, the base being a smaller one Has circumference and / or diameter than the free end. Roller pump (100) according to one of the preceding claims, wherein at least one holding section (125e) for laterally limiting, for releasably holding or for releasably securing a further hose on an outside (121a) of the pressing wall (121), radially to the pressing wall (121) and / or is provided at a greater distance from the axis of rotation than each section of the pump bed (123). Medical tubing set, comprising: - A tube (130) with a pump tube segment (131); and - A fixing section (133) adjoining the pump tubing segment (131) for fixing or holding the pump tubing segment (131) in a first holding section (125a) of a roller pump (100) or a medical treatment device (4), the outer diameter or the outer circumference of the Fixing section (133) tapers at least in sections and / or in steps in the direction of the pump tube segment (131). Medical hose set according to Claim 8 , wherein the fixing portion (133) has at least three mutually different first (133a), second (133b) and third (133c) outer diameters or outer circumferences, optionally the first outer diameter (133a) or outer circumference being greater than the second outer diameter (133b) or Outer circumference, which in turn is larger than the third outer diameter (133c) or outer circumference, and optionally the third outer diameter (133c) or outer circumference is arranged closer to the pump hose segment (131) than the second outer diameter (133b) or outer circumference, which is again closer to the pump hose segment (131) is arranged as the first outer diameter (133a) or outer circumference. Medical treatment device (4) with - a roller pump (100) according to one of the Claims 1 to 7th ; - a pressure measuring point; and - an insertion section arranged in the area of the pressure measuring point for inserting an insertion element (135) of a hose (130). Medical treatment device (4) according to Claim 10 , suitable and / or configured for carrying out a hemodialysis, a hemofiltration, a hemodiafiltration or a separation process. A medical treatment system comprising: a medical treatment device (4) according to one of the Claims 10 to 11 ; and - a medical hose set with a hose (130), in particular according to one of the Claims 8 to 9 , wherein the hose (130) has a pump hose segment (131) or is connected to it, for insertion into the roller pump (100) of the medical treatment device (4). Medical treatment system according to Claim 12 , wherein a section of the hose (130) is inserted into the insertion section adjacent to the pressure measuring point, and the first section of the hose (130) is inserted into the first holding section (125a). Method for filling and / or priming a medical tubing set with a tube (130) and with a pump tube segment (131), in particular according to one of the Claims 8 to 9 comprising the steps of: - providing a medical treatment device (4) according to one of Claims 10 to 11 ; - Inserting the first section of the hose (130) into the first holding section (125a); and - filling and priming the tube (130) with a medicinal liquid. Procedure according to Claim 14 , the filling and priming taking place while the hose (130) is inserted into the insertion section in the area of the pressure measuring point. Procedure according to Claim 14 or 15th , with the further steps: - Removing the first section of the tube (130) filled with the medical liquid from the first holding section (125a); and - placing the pump tubing segment (131) in the pump bed (123).

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