WO2021141485A1 - Catheter assembly comprising a guide extension catheter and a trapping balloon catheter - Google Patents

Catheter assembly comprising a guide extension catheter and a trapping balloon catheter Download PDF

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Publication number
WO2021141485A1
WO2021141485A1 PCT/NL2020/050647 NL2020050647W WO2021141485A1 WO 2021141485 A1 WO2021141485 A1 WO 2021141485A1 NL 2020050647 W NL2020050647 W NL 2020050647W WO 2021141485 A1 WO2021141485 A1 WO 2021141485A1
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WO
WIPO (PCT)
Prior art keywords
gec
tbc
shaft
catheter
guiding
Prior art date
Application number
PCT/NL2020/050647
Other languages
French (fr)
Inventor
Edwin Alexander Schulting
Original Assignee
Imds R&D B.V.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Imds R&D B.V. filed Critical Imds R&D B.V.
Publication of WO2021141485A1 publication Critical patent/WO2021141485A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0113—Mechanical advancing means, e.g. catheter dispensers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0169—Exchanging a catheter while keeping the guidewire in place

Definitions

  • Catheter assembly comprising a guide extension catheter and a trapping balloon catheter.
  • the invention relates to a catheter assembly comprising a guide extension catheter and a trapping balloon catheter.
  • a trapping balloon is commonly used inside a guide catheter for fixation of a guidewire inside the guide catheter.
  • Such a use is for example shown in Fig. 1 of WO 2018/056807 A1.
  • the trapping balloon 22 of the trapping balloon catheter 10 has been inflated to clampingly fixate the guidewire 11 against the wall of the guide catheter 9.
  • the trapping balloon catheter 10 Prior to the situation of said Fig. 1, the trapping balloon catheter 10 had been inserted into the guide catheter 9, and had subsequently been advanced distally inside the guide catheter 9. These actions had been done with the trapping balloon 22 in a yet un-inflated state.
  • the trapping balloon 22 should preferably not be advanced out of the distal end 17 of the guide catheter 9, since this would result into serious risk of traumatizing artery tissue of a patient.
  • a guide catheter is used in combination with a so-called “guide extension catheter” (“GEC”, as used herein).
  • GEC serves to provide the distal end of the guide catheter with a telescopic tubular elongation.
  • Such a GEC usually comprises a GEC hub, which is a proximal end portion of the GEC, a GEC tubular guiding portion, which is a distal end portion of the GEC, and a GEC shaft, which interconnects the GEC hub and the tubular guiding portion.
  • the GEC tubular guiding portion serves as the above- mentioned telescopic tubular elongation for a guide catheter, wherein the GEC tubular guiding portion has a smaller diameter than the diameter of the guide catheter.
  • a catheter assembly comprising:
  • a GEC being a guide extension catheter, which comprises:
  • GEC tubular guiding portion which is a distal end portion of the GEC (10)
  • GEC shaft having a proximal GEC shaft end portion and a distal GEC shaft end portion, wherein the distal GEC shaft end portion is connected to the GEC tubular guiding portion;
  • a TBC being a trapping balloon catheter, which comprises:
  • TBC inflation hub which is a proximal end portion of the TBC
  • a trapping balloon which is located distally from the TBC inflation hub, and which is bounding an internal balloon space
  • TBC shaft which has an inflation lumen, and which interconnects the TBC inflation hub and the trapping balloon for inflating the internal balloon space (24) via the TBC inflation hub and the inflation lumen, respectively, and
  • TBC guiding structure which is connected to the TBC shaft, and which is located distally from the TBC inflation hub;
  • the TBC guiding structure is configured to be brought, via the proximal GEC shaft end portion, in a slidable guiding engagement with the GEC shaft along the longitudinal direction of the GEC shaft, to thereby form an assembled condition of the catheter assembly in which the TBC is slidable relative to the GEC along the longitudinal direction of the GEC shaft,
  • said slidable guiding engagement is limited in a movement direction of the TBC towards a distal end of the GEC, by abutting engagement between the TBC guiding structure and the GEC tubular guiding portion.
  • the catheter assembly has said assembled condition in which the TBC is slidable relative to the GEC along the longitudinal direction of the GEC shaft. ii. In said assembled condition of the catheter assembly, said slidable guiding engagement is limited in a movement direction of the TBC towards a distal end of the GEC, by abutting engagement between the TBC guiding structure and the GEC tubular guiding portion.
  • the combination of these key features (i) and (ii) allows to advance the trapping balloon catheter inside an assembly of a guide catheter and a GEC, without risk of advancing the trapping balloon out of the distal end of the GEC, hence without risk of traumatizing artery tissue of a patient. Accordingly, with the catheter assembly according to the invention the trapping balloon can be advanced very quickly inside an assembly of a guide catheter and a GEC, without need to use for example fluoroscopy for following the progress of the catheter.
  • the GEC further comprises a GEC hub, which is a proximal end portion of the GEC, and
  • the GEC hub has a releasable connection to the GEC shaft, so that the GEC has a released hub condition in which the GEC hub has been released from the GEC shaft, by which the proximal GEC shaft end portion has been exposed so that the TBC guiding structure can be brought, via the exposed proximal GEC shaft end portion, in said slidable guiding engagement with the GEC shaft to thereby form said assembled condition of the catheter assembly.
  • a catheter assembly according to the invention in which at least part of the TBC guiding structure is located distally from the trapping balloon and/or in which at least part of the TBC guiding structure is located proximally from the trapping balloon and/or in which at least part of the TBC guiding structure is located in the longitudinal range in which the trapping balloon is extending.
  • abutting engagement between the TBC guiding structure and the GEC tubular guiding portion takes place at a location which is distally from the trapping balloon and/or in which said abutting engagement between the TBC guiding structure and the GEC tubular guiding portion takes place at a location which is proximally from the trapping balloon and/or in which said abutting engagement between the TBC guiding structure and the GEC tubular guiding portion takes place at a location in the longitudinal range in which the trapping balloon is extending.
  • At least part of the TBC guiding structure is located distally from the trapping balloon in such manner that said abutting engagement between the TBC guiding structure and the GEC tubular guiding portion takes place at a location which is distally from the trapping balloon. This way, the trapping balloon is even prevented from advancing into the GEC tubular guiding portion of the GEC.
  • At least part of the TBC guiding structure is tubular for guidingly surrounding the GEC shaft in a circumferential direction around the longitudinal direction of the GEC shaft to effect said slidable guiding engagement between the TBC guiding structure and the GEC shaft.
  • Said being tubular may be realized in many various ways, for example by way of oval shape, circular shape, polygonal shape (e.g. rectangular, square, etc.), etc.
  • Fig. 1 shows, in a cross-sectional side view, an example of an embodiment of a catheter assembly according to the invention.
  • Fig. 2 shows the situation of Fig. 1 again, however, wherein this time the catheter assembly has been brought in its above-mentioned assembled condition.
  • Fig. 3 shows an enlarged portion of the situation of Fig. 2 again, however, wherein this time the GEC is in use as a telescopic tubular elongation of a guide catheter, and wherein a guidewire is extending through the guide catheter and the
  • Fig. 4 shows a view, according to the arrows IV in Fig. 3, at a cross- sectional plane perpendicular to the longitudinal direction of the GEC shaft.
  • Fig. 5 shows a view, according to the arrows V in Fig. 3, at another cross- sectional plane perpendicular to the longitudinal direction of the GEC shaft.
  • Figs. 1-5 Based on the above introductory description, including the brief description of the drawing figures, and based on the above-listed reference signs used in Figs. 1-5, the examples of Figs. 1-5 are readily self-explanatory. The following brief extra explanations are given.
  • the TBC 20 and the GEC 10 of the catheter assembly 1 are not yet mutually assembled.
  • the GEC hub 11 is releasably connected to the proximal GEC shaft end portion 15 of the GEC shaft 14.
  • the GEC hub 11 has been released and removed from the GEC shaft 14. Furthermore, in Fig. 2 the TBC guiding structure 26 has been brought, via the exposed proximal GEC shaft end portion 15, in slidable guiding engagement with the GEC shaft 14. Furthermore, in Fig. 2 the TBC 20 has been slided in the movement direction towards the distal end 27 of the GEC 10 to the extent that the TBC guiding structure 26 is abutting against the GEC tubular guiding portion 12. In the shown example of Fig.
  • the GEC tubular guiding portion 12 is along most of its length completely tubular in circumferential direction, and at its proximal side it has a portion that is cut-off like, in a more or less half-pipe manner or semi-pipe manner.
  • the TBC guiding structure 26 is abutting against said cut-off like portion of the GEC tubular guiding portion 12.
  • FIG. 2 This abutting situation of Fig. 2 is also present in Figs. 3, 4, 5, in which the GEC 10 is in use as a telescopic tubular elongation of the guide catheter 30, and in which the guidewire 40 is extending through the guide catheter 30 and the GEC 10.
  • typical shapes and/or dimensions of some parts and aspects of the invention, and applicable practical ranges of such dimensions are as follows.
  • Length of the trapping balloon can be in the range between 5 mm and 30 mm, and can typically be 15 mm; diameter of the trapping balloon can be in the range between 1.6 mm and 3.5 mm, and can typically be 2.5 mm; the trapping balloon’s “crossing profile” (i.e. profile in un-inflated state) can be in the range between 0.25 mm and 0.55 mm, and can typically be 0.38 mm.
  • the trapping balloon may typically be circular, however, other shapes, such as eccentric shapes (with a ratio of for example 1/3 - 2/3, or different) are possible as well.
  • Length of the GEC shaft can be in the range between 80 cm and 160 cm, and can typically be 135 cm. Many various cross-sectional shapes of the GEC shaft are possible, for example typically oval shapes, circular shapes, or variations. But polygonal shapes (e.g. rectangular, square, etc.), may also be possible.
  • a cross- sectional maximum dimension of the GEC shaft e.g. a diameter of the GEC shaft, in case the GEC shaft has a circular cross-section
  • Length of the TBC shaft can be in the range between 80 cm and 160 cm, and can typically be 135 cm. Many various cross-sectional shapes of the TBC shaft are possible, for example typically circular shapes, or variations, such as oval shapes or polygonal shapes.
  • a cross-sectional maximum dimension of the TBC shaft can be in the range between 0.20 mm and 0.70 mm. For example, in case the TBC shaft has a circular cross-section, the diameter of the TBC shaft can typically be 0.40 mm.
  • the GEC 10 comprises the GEC hub 11 which is releasable from the GEC shaft 14.
  • the GEC may not have a hub at all, so that the TBC guiding structure can always be brought, via the proximal GEC shaft end portion, in said slidable guiding engagement with the GEC shaft, to thereby form said assembled condition of the catheter assembly.

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Abstract

The invention provides a catheter assembly (1) comprising a guide extension catheter (GEC) and a trapping balloon catheter (TBC). The GEC (10) comprises a GEC shaft (14) and a GEC tubular guiding portion (12). The TBC (20) comprises a TBC inflation hub (21), a TBC shaft (23) and a trapping balloon (22). The TBC further comprises a TBC guiding structure (26), which is configured to be brought in slidable guiding engagement with the GEC shaft. The slidability is limited by abutting engagement between the TBC guiding structure (26) and the GEC tubular guiding portion (12). According to the invention a trapping balloon catheter can be advanced very quickly inside an assembly of a guide catheter and a GEC without risk of advancing the trapping balloon out of the distal end of the GEC.

Description

Title: Catheter assembly comprising a guide extension catheter and a trapping balloon catheter.
The invention relates to a catheter assembly comprising a guide extension catheter and a trapping balloon catheter.
A trapping balloon is commonly used inside a guide catheter for fixation of a guidewire inside the guide catheter. Such a use is for example shown in Fig. 1 of WO 2018/056807 A1. In the situation of said Fig. 1 the trapping balloon 22 of the trapping balloon catheter 10 has been inflated to clampingly fixate the guidewire 11 against the wall of the guide catheter 9. Prior to the situation of said Fig. 1, the trapping balloon catheter 10 had been inserted into the guide catheter 9, and had subsequently been advanced distally inside the guide catheter 9. These actions had been done with the trapping balloon 22 in a yet un-inflated state. During the advancing action of the trapping balloon catheter 10, the trapping balloon 22 should preferably not be advanced out of the distal end 17 of the guide catheter 9, since this would result into serious risk of traumatizing artery tissue of a patient. There are other cases in which a guide catheter is used in combination with a so-called “guide extension catheter” (“GEC”, as used herein). Such a GEC serves to provide the distal end of the guide catheter with a telescopic tubular elongation. Such a GEC usually comprises a GEC hub, which is a proximal end portion of the GEC, a GEC tubular guiding portion, which is a distal end portion of the GEC, and a GEC shaft, which interconnects the GEC hub and the tubular guiding portion. Therein, the GEC tubular guiding portion serves as the above- mentioned telescopic tubular elongation for a guide catheter, wherein the GEC tubular guiding portion has a smaller diameter than the diameter of the guide catheter. It is an object of the invention to provide a solution according to which a trapping balloon can be efficiently and safely used with a guide catheter that is provided with a guide extension catheter (GEC). For that purpose the invention provides a catheter assembly according to the appended independent claim 1. Preferable embodiments of the invention are provided by the appended dependent claims 2-4.
Hence the invention provides a catheter assembly comprising:
• a GEC, being a guide extension catheter, which comprises:
- a GEC tubular guiding portion, which is a distal end portion of the GEC (10), and
- a GEC shaft, having a proximal GEC shaft end portion and a distal GEC shaft end portion, wherein the distal GEC shaft end portion is connected to the GEC tubular guiding portion;
• a TBC, being a trapping balloon catheter, which comprises:
- a TBC inflation hub, which is a proximal end portion of the TBC,
- a trapping balloon, which is located distally from the TBC inflation hub, and which is bounding an internal balloon space,
- a TBC shaft, which has an inflation lumen, and which interconnects the TBC inflation hub and the trapping balloon for inflating the internal balloon space (24) via the TBC inflation hub and the inflation lumen, respectively, and
- a TBC guiding structure, which is connected to the TBC shaft, and which is located distally from the TBC inflation hub; and wherein:
- the TBC guiding structure is configured to be brought, via the proximal GEC shaft end portion, in a slidable guiding engagement with the GEC shaft along the longitudinal direction of the GEC shaft, to thereby form an assembled condition of the catheter assembly in which the TBC is slidable relative to the GEC along the longitudinal direction of the GEC shaft,
- in said assembled condition of the catheter assembly, said slidable guiding engagement is limited in a movement direction of the TBC towards a distal end of the GEC, by abutting engagement between the TBC guiding structure and the GEC tubular guiding portion.
Some key features of the catheter assembly according to the invention are summarized as follows. i. The catheter assembly has said assembled condition in which the TBC is slidable relative to the GEC along the longitudinal direction of the GEC shaft. ii. In said assembled condition of the catheter assembly, said slidable guiding engagement is limited in a movement direction of the TBC towards a distal end of the GEC, by abutting engagement between the TBC guiding structure and the GEC tubular guiding portion.
The combination of these key features (i) and (ii) allows to advance the trapping balloon catheter inside an assembly of a guide catheter and a GEC, without risk of advancing the trapping balloon out of the distal end of the GEC, hence without risk of traumatizing artery tissue of a patient. Accordingly, with the catheter assembly according to the invention the trapping balloon can be advanced very quickly inside an assembly of a guide catheter and a GEC, without need to use for example fluoroscopy for following the progress of the catheter.
In a preferable embodiment of a catheter assembly according to the invention:
- the GEC further comprises a GEC hub, which is a proximal end portion of the GEC, and
- the GEC hub has a releasable connection to the GEC shaft, so that the GEC has a released hub condition in which the GEC hub has been released from the GEC shaft, by which the proximal GEC shaft end portion has been exposed so that the TBC guiding structure can be brought, via the exposed proximal GEC shaft end portion, in said slidable guiding engagement with the GEC shaft to thereby form said assembled condition of the catheter assembly.
In principle many various embodiments of a catheter assembly according to the invention are possible in which at least part of the TBC guiding structure is located distally from the trapping balloon and/or in which at least part of the TBC guiding structure is located proximally from the trapping balloon and/or in which at least part of the TBC guiding structure is located in the longitudinal range in which the trapping balloon is extending.
Also, in principle many various embodiments of a catheter assembly according to the invention are possible in which said abutting engagement between the TBC guiding structure and the GEC tubular guiding portion takes place at a location which is distally from the trapping balloon and/or in which said abutting engagement between the TBC guiding structure and the GEC tubular guiding portion takes place at a location which is proximally from the trapping balloon and/or in which said abutting engagement between the TBC guiding structure and the GEC tubular guiding portion takes place at a location in the longitudinal range in which the trapping balloon is extending.
In another preferable embodiment of a catheter assembly according to the invention, at least part of the TBC guiding structure is located distally from the trapping balloon in such manner that said abutting engagement between the TBC guiding structure and the GEC tubular guiding portion takes place at a location which is distally from the trapping balloon. This way, the trapping balloon is even prevented from advancing into the GEC tubular guiding portion of the GEC.
In principle many various configurations of the TBC guiding structure of a catheter assembly according to the invention are possible to effect said slidable guiding engagement of the TBC guiding structure with the GEC shaft.
In yet another preferable embodiment of a catheter assembly according to the invention, at least part of the TBC guiding structure is tubular for guidingly surrounding the GEC shaft in a circumferential direction around the longitudinal direction of the GEC shaft to effect said slidable guiding engagement between the TBC guiding structure and the GEC shaft. Said being tubular may be realized in many various ways, for example by way of oval shape, circular shape, polygonal shape (e.g. rectangular, square, etc.), etc.
In the following, the invention is further elucidated with reference to non- limiting embodiments and with reference to the schematic figures in the appended drawing, in which the following is shown.
Fig. 1 shows, in a cross-sectional side view, an example of an embodiment of a catheter assembly according to the invention.
Fig. 2 shows the situation of Fig. 1 again, however, wherein this time the catheter assembly has been brought in its above-mentioned assembled condition.
Fig. 3 shows an enlarged portion of the situation of Fig. 2 again, however, wherein this time the GEC is in use as a telescopic tubular elongation of a guide catheter, and wherein a guidewire is extending through the guide catheter and the
GEC.
Fig. 4 shows a view, according to the arrows IV in Fig. 3, at a cross- sectional plane perpendicular to the longitudinal direction of the GEC shaft.
Fig. 5 shows a view, according to the arrows V in Fig. 3, at another cross- sectional plane perpendicular to the longitudinal direction of the GEC shaft.
The reference signs used in Figs. 1-5 are referring to the above-mentioned parts and aspects of the invention, as well as to related parts and aspects, in the following manner.
1 ------------- catheter assembly
10 ----------- GEC (guide extension catheter)
11 ----------- GEC hub
12 ----------- GEC tubular guiding portion
14 ----------- GEC shaft
15 ----------- proximal GEC shaft end portion
16 ----------- distal GEC shaft end portion
20 ----------- TBC (trapping balloon catheter)
21 ----------- TBC inflation hub
22 ----------- trapping balloon
23 ----------- TBC shaft
24 ----------- internal balloon space
25 ----------- inflation lumen
26 ----------- TBC guiding structure
27 ----------- distal end of GEC
30 ----------- guide catheter
40 ----------- guidewire
Based on the above introductory description, including the brief description of the drawing figures, and based on the above-listed reference signs used in Figs. 1-5, the examples of Figs. 1-5 are readily self-explanatory. The following brief extra explanations are given. In the situation of Fig. 1 the TBC 20 and the GEC 10 of the catheter assembly 1 are not yet mutually assembled. In Fig. 1 the GEC hub 11 is releasably connected to the proximal GEC shaft end portion 15 of the GEC shaft 14.
In the situation of Fig. 2 the GEC hub 11 has been released and removed from the GEC shaft 14. Furthermore, in Fig. 2 the TBC guiding structure 26 has been brought, via the exposed proximal GEC shaft end portion 15, in slidable guiding engagement with the GEC shaft 14. Furthermore, in Fig. 2 the TBC 20 has been slided in the movement direction towards the distal end 27 of the GEC 10 to the extent that the TBC guiding structure 26 is abutting against the GEC tubular guiding portion 12. In the shown example of Fig. 2, the GEC tubular guiding portion 12 is along most of its length completely tubular in circumferential direction, and at its proximal side it has a portion that is cut-off like, in a more or less half-pipe manner or semi-pipe manner. In the shown example of Fig. 2, the TBC guiding structure 26 is abutting against said cut-off like portion of the GEC tubular guiding portion 12.
This abutting situation of Fig. 2 is also present in Figs. 3, 4, 5, in which the GEC 10 is in use as a telescopic tubular elongation of the guide catheter 30, and in which the guidewire 40 is extending through the guide catheter 30 and the GEC 10.
In Figs. 4, 5 it is seen that in the shown example of Figs. 1-5 the GEC shaft 14 and the TBC guiding structure 26 have mutually co-operating oval cross- sectional shapes.
It is noted that, according to the invention, many various ways are possible for realizing the above-mentioned releasable connection between the GEC hub and the GEC shaft, for example by screwed connection, by negative fit with a softer hub material, by small thickening or narrowing at a proximal end portion of the GEC shaft in combination with an injection-moulded hub that snaps over said end portion, by bayonet catching, etc., etc.
It is further noted that, according to the invention, typical shapes and/or dimensions of some parts and aspects of the invention, and applicable practical ranges of such dimensions are as follows. Length of the trapping balloon can be in the range between 5 mm and 30 mm, and can typically be 15 mm; diameter of the trapping balloon can be in the range between 1.6 mm and 3.5 mm, and can typically be 2.5 mm; the trapping balloon’s “crossing profile” (i.e. profile in un-inflated state) can be in the range between 0.25 mm and 0.55 mm, and can typically be 0.38 mm. The trapping balloon may typically be circular, however, other shapes, such as eccentric shapes (with a ratio of for example 1/3 - 2/3, or different) are possible as well.
Length of the GEC shaft can be in the range between 80 cm and 160 cm, and can typically be 135 cm. Many various cross-sectional shapes of the GEC shaft are possible, for example typically oval shapes, circular shapes, or variations. But polygonal shapes (e.g. rectangular, square, etc.), may also be possible. A cross- sectional maximum dimension of the GEC shaft (e.g. a diameter of the GEC shaft, in case the GEC shaft has a circular cross-section) can be in the range between 0.20 mm and 0.70 mm, and can typically be 0.43 mm.
Length of the TBC shaft can be in the range between 80 cm and 160 cm, and can typically be 135 cm. Many various cross-sectional shapes of the TBC shaft are possible, for example typically circular shapes, or variations, such as oval shapes or polygonal shapes. A cross-sectional maximum dimension of the TBC shaft can be in the range between 0.20 mm and 0.70 mm. For example, in case the TBC shaft has a circular cross-section, the diameter of the TBC shaft can typically be 0.40 mm.
In the shown embodiment of Figs. 1-5 the GEC 10 comprises the GEC hub 11 which is releasable from the GEC shaft 14. Alternatively, in a more general embodiment of a catheter assembly according to the present invention, the GEC may not have a hub at all, so that the TBC guiding structure can always be brought, via the proximal GEC shaft end portion, in said slidable guiding engagement with the GEC shaft, to thereby form said assembled condition of the catheter assembly.

Claims

Claims
1. A catheter assembly (1) comprising:
• a GEC (10), being a guide extension catheter, which comprises:
- a GEC tubular guiding portion (12), which is a distal end portion of the GEC (10), and
- a GEC shaft (14), having a proximal GEC shaft end portion (15) and a distal GEC shaft end portion (16), wherein the distal GEC shaft end portion (16) is connected to the GEC tubular guiding portion (12);
• a TBC (20), being a trapping balloon catheter, which comprises:
- a TBC inflation hub (21), which is a proximal end portion of the TBC
(20),
- a trapping balloon (22), which is located distally from the TBC inflation hub (21), and which is bounding an internal balloon space (24),
- a TBC shaft (23), which has an inflation lumen (25), and which interconnects the TBC inflation hub (21) and the trapping balloon (22) for inflating the internal balloon space (24) via the TBC inflation hub and the inflation lumen, respectively, and
- a TBC guiding structure (26), which is connected to the TBC shaft (23), and which is located distally from the TBC inflation hub (21); and wherein:
- the TBC guiding structure (26) is configured to be brought, via the proximal GEC shaft end portion (15), in a slidable guiding engagement with the GEC shaft (14) along the longitudinal direction of the GEC shaft, to thereby form an assembled condition of the catheter assembly (1) in which the TBC (20) is slidable relative to the GEC (10) along the longitudinal direction of the GEC shaft (23),
- in said assembled condition of the catheter assembly (1), said slidable guiding engagement is limited in a movement direction of the TBC (20) towards a distal end (27) of the GEC (10), by abutting engagement between the TBC guiding structure (26) and the GEC tubular guiding portion (12).
2. A catheter assembly (1) according to claim 1, wherein:
- the GEC (10) further comprises a GEC hub (11), which is a proximal end portion of the GEC (10), and
- the GEC hub (11) has a releasable connection to the GEC shaft (14), so that the GEC (10) has a released hub condition in which the GEC hub has been released from the GEC shaft, by which the proximal GEC shaft end portion (15) has been exposed so that the TBC guiding structure (26) can be brought, via the exposed proximal GEC shaft end portion (15), in said slidable guiding engagement with the GEC shaft (14) to thereby form said assembled condition of the catheter assembly (1).
3. A catheter assembly (1) according to any one of the preceding claims, wherein at least part of the TBC guiding structure (26) is located distally from the trapping balloon (22) in such manner that said abutting engagement between the TBC guiding structure and the GEC tubular guiding portion (12) takes place at a location which is distally from the trapping balloon.
4. A catheter assembly (1) according to any one of the preceding claims, wherein at least part of the TBC guiding structure (26) is tubular for guidingly surrounding the GEC shaft (14) in a circumferential direction around the longitudinal direction of the GEC shaft to effect said slidable guiding engagement between the TBC guiding structure and the GEC shaft.
PCT/NL2020/050647 2020-01-07 2020-10-21 Catheter assembly comprising a guide extension catheter and a trapping balloon catheter WO2021141485A1 (en)

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EP20150561.7 2020-01-07

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Citations (6)

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US5843051A (en) * 1990-10-29 1998-12-01 Scimed Life Systems, Inc. Intravascular device for coronary heart treatment
US20030050600A1 (en) * 2001-05-01 2003-03-13 Velocimed, L.L.C. Emboli protection devices and related methods of use
WO2016126974A1 (en) * 2015-02-04 2016-08-11 Route 92 Medical, Inc. Rapid aspiration thrombectomy system and method
WO2018056807A1 (en) 2016-09-20 2018-03-29 Imds R&D B.V. Trapping catheter and kit and method for preparing a trapping catheter
US20180353732A1 (en) * 2015-04-09 2018-12-13 Boston Scientific Scimed, Inc. Trap balloon catheter with trap balloon retainer
US20190366049A1 (en) * 2018-06-05 2019-12-05 Medtronic Vascular, Inc. Catheter including slidable push grip

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5843051A (en) * 1990-10-29 1998-12-01 Scimed Life Systems, Inc. Intravascular device for coronary heart treatment
US20030050600A1 (en) * 2001-05-01 2003-03-13 Velocimed, L.L.C. Emboli protection devices and related methods of use
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