WO2023227506A1 - Endovascular stapling system for resection of the laa - Google Patents

Endovascular stapling system for resection of the laa Download PDF

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Publication number
WO2023227506A1
WO2023227506A1 PCT/EP2023/063602 EP2023063602W WO2023227506A1 WO 2023227506 A1 WO2023227506 A1 WO 2023227506A1 EP 2023063602 W EP2023063602 W EP 2023063602W WO 2023227506 A1 WO2023227506 A1 WO 2023227506A1
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WO
WIPO (PCT)
Prior art keywords
atrial appendage
medical system
connecting device
left atrial
spacer
Prior art date
Application number
PCT/EP2023/063602
Other languages
French (fr)
Inventor
Georg Nollert
Original Assignee
Biotronik Ag
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 Biotronik Ag filed Critical Biotronik Ag
Publication of WO2023227506A1 publication Critical patent/WO2023227506A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B17/07207—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
    • A61B2017/00238—Type of minimally invasive operation
    • A61B2017/00243—Type of minimally invasive operation cardiac

Definitions

  • the present invention relates to a medical system, particularly an endovascular stapling / suture system, for exclusion of the left atrial appendage.
  • LAA left atrial appendage
  • AF atrial fibrillation
  • the left atrial tube can be ligated and resected after thoracotomy. This however, is a very invasive procedure.
  • occluder systems are used to fill and occlude the left atrial ear via a transseptal approach.
  • the disadvantage of such approaches is that thrombi continue to form in the atrial ear, which can embolize if the atrial ear is not completely closed.
  • anticoagulants must be given for a period of time, which is problematic because the indication for this procedure is actually only for patients with a contraindication to anticoagulants.
  • US 2020/0229837 discloses a method of positioning an occlusion clip proximate a left atrial appendage that includes creating an access port that exposes the left atrial appendage; delivering a suction grasper via the access port, the suction grasper including opposing jaws each having a suction port; delivering an occlusion clip via the access port; grasping the left atrial appendage via the suction grasper by applying suction to an exterior of the left atrial appendage so that a portion of the left atrial appendage interposes the opposing jaws while suction is applied via the suction ports; repositioning the suction grasper to tension the left atrial appendage; delivering an occlusion clip via the access port; clamping a base of the left atrial appendage using the occlusion clip while the suction grasper applies tension to the left atrial appendage; and/or egressing the suction grasper via the access port.
  • US 2012/0179153 discloses a surgical instrument in which an elongated shaft is used in conjunction with a separate, remotely actuable tool head for performing a procedure on a target tissue.
  • the shaft has a tool engagement member carried at its distal end that is remotely actuable through the shaft to engage and release the tool head.
  • US 2013/0032627A1 discloses an articulation mechanism for use with a surgical instrument that includes a shaft, a first member disposed in mechanical cooperation with the articulation shaft, a second member disposed in mechanical cooperation with the shaft, and a flexible shaft having proximal and distal portions.
  • the flexible member is operatively coupled to the first and second members.
  • at least one of the first and the second members moves longitudinally with respect to the other of the first and second members between a first position where the first and second members are approximated to each other and a second position where the first and second members are spaced apart from each other. This longitudinal motion causes the distal portion of the flexible member to articulate relative to the proximal portion.
  • Surgical stapling devices in general are known for example from US 2020/275925 Al, US 2008/294179 Al or US 5,403,326 A.
  • thoracotomy is a major invasive surgical procedure associated with significant pain and morbidity. Therefore, surgical intervention is not indicated only because of AF, but it is performed in combination with other cardiac surgical procedures (e.g., mitral valve repair, VCF ablation, etc.).
  • LAA occluders include thromboembolism, device embolism, perforation, etc., so that their use is currently limited to a small subgroup of AF patients who have a contraindication to long-term coagulation due to their increased risk of bleeding.
  • the problem to be solved by the present invention is to provide a medical system for exclusion of the LAA that allows an improved treatment of persons having atrial fibrillation.
  • a medical system that does not leave larger implants in the left atrium.
  • a medical system preferably for exclusion of the left atrial appendage is disclosed, the medical system comprising:
  • tissue forceps configured to be inserted into the left atrium transseptally, to invert the left atrial appendage into the left atrium, and optionally to retrieve the severed left atrial appendage from the left atrium
  • a surgical connecting device configured to be inserted into the left atrium transseptally and to apply at least one connection element (such as a staple or suture for instance) to the inverted atrial appendage to close the inverted left atrial appendage in a blood-tight manner, wherein optionally the surgical stapling or suture device is further configured to sever the closed inverted left atrial appendage at a base of the left atrial appendage, and
  • a guiding structure for guiding the surgical stapling device along the forceps (towards the inverted left atrial appendage).
  • the present invention aims at solving the above-described difficulties pertaining to the prior art by efficiently and safely excluding the left atrial appendage and optionally resecting and removing it via a transseptal approach.
  • the advantage of the solution according to the invention is that no implant remains in the left atrium, so that the patient does not have to be anticoagulated as in surgical resection.
  • the surgical connecting device can be a surgical stapling device configured to apply at least one connection element in form of a (surgical) staple to the inverted atrial appendage to close the inverted left atrial appendage.
  • the surgical connecting device can also use means other than staples in order to seal the inverted left atrial appendage, for example a clamp, a clip, a device for applying a (Nitinol) suture, a glue or a rubber band.
  • the tissue forceps is steerable allowing to curve the tissue forceps in a defined manner to allow a controlled access to the left atrium upon the transseptal approach.
  • the surgical connecting device comprises a deflectable distal end portion, the end portion being particularly connected in an articulate fashion (e.g., hinged) to an intermediary shaft portion of the surgical connecting device, said distal end portion being configured to apply said at least one staple.
  • said distal end portion is deflectable such that said end portion extends at an angle with respect to the intermediary shaft portion of the of surgical connecting device, the angle being smaller or equal to 90°.
  • the guiding structure comprises a spacer connected to the surgical connecting device, the spacer being configured to engage with and slide along a shaft of the tissue forceps.
  • the tissue forceps thus acts as a guiding rail for the surgical connecting device allowing a defined delivery of the surgical connecting device to the site of the inverted left atrial appendage.
  • the tissue forceps may form (only) on one side a guiding rail for the surgical connecting device, e.g. the surgical stapling device).
  • said spacer for engaging with and sliding along the shaft of the tissue forceps, is configured to be moved from a retracted position into an advanced position, in which the spacer protrudes from the surgical connecting device and is configured to engage with and slide along the shaft of the tissue forceps for guiding the surgical connecting device along the tissue forceps towards the inverted atrial tube.
  • the guiding structure comprises a spacer connected to the tissue forceps, the spacer being configured to engage with and let a shaft portion (i.e., the intermediary shaft portion) of the surgical connecting device slide along the spacer.
  • the spacer for letting the shaft portion of the surgical connecting device slide along the spacer, is configured to be moved from a retracted position into an advanced position, in which the spacer protrudes from the tissue forceps and is configured to contact the shaft portion of the surgical connecting device for guiding the latter along the spacer of the tissue forceps towards the inverted left atrial appendage.
  • the medical system comprises a guide wire, wherein the tissue forceps comprises a lumen for receiving the guide wire to guide the tissue forceps along the guide wire towards the left atrial appendage.
  • the tissue forceps comprises two opposing jaws for grasping tissue, the two jaws forming a tip in a closed stated of the jaws, wherein said lumen is connected to an opening arranged on a shaft of the tissue forceps, through which opening the guide wire is insertable into the lumen, wherein particularly the opening is spaced apart from said tip, particularly by a distance in the range of 1.5 cm to 2.5 cm.
  • a method for resecting a left atrial appendage using a medical system according to the present invention is disclosed, the method comprising the steps of:
  • the method can further comprise the step of cutting the closed inverted left atrial appendage at a base of the left atrial appendage with the surgical connecting device.
  • the method can comprise the step of removing the severed left atrial appendage from the left atrium using the tissue forceps in particular.
  • the surgical connecting device can be a surgical stapling device.
  • Fig. 1 shows an embodiment of a medical device according to the present invention
  • Fig. 1 shows a schematical illustration of an embodiment of a medical system 1 according to the present invention, the medical system 1 being adapted for exclusion of a left atrial appendage, wherein the medical system 1 comprises a tissue forceps 2 configured to be inserted into the left atrium transseptally, to invert the left atrial appendage into the left atrium, and optionally to completely remove the severed left atrial appendage from the left atrium. Furthermore, the system 1 comprises a surgical connecting device 3 configured to be inserted into the left atrium transseptally, too, and to apply at least one connection element to the inverted atrial appendage to close the inverted left atrial appendage in a blood-tight manner.
  • the surgical connection device 3 being a surgical stapling device 3 configured to apply at least one staple as connection element, but other suitable connection elements can also be used in the context of the present invention.
  • the surgical stapling device 3 is configured to cut the closed inverted left atrial appendage at a base of the left atrial appendage to eventually allow removal of the atrial appendage by means of the tissue forceps 2.
  • the system 1 comprises a guiding structure 4 for guiding the surgical stapling device 3 along the tissue forceps 2 towards the inverted left atrial appendage.
  • the tissue forceps 2 is steerable.
  • the tissue forceps 2 can comprise a steerable shaft 20 to which two jaws 22 for grasping tissue (e.g., the left atrial appendage) are connected.
  • the surgical stapling device 3 comprises a deflectable distal end portion 32, the end portion 32 being hinged via a suitable joint 31 to an intermediary shaft portion 30 of the surgical stapling device 3.
  • said distal end portion 32 of the surgical stapling device 3 is configured to apply said at least one staple.
  • the surgical stapling device 3 comprises two opposing jaws 33 for clamping the tissue upon stapling and applying the staples.
  • one or two of the jaws can comprise a blade for cutting the tissue (e.g., left atrial appendage), e.g., after it has been stapled.
  • said distal end portion 32 is preferably deflectable such that said end portion 32 extends at an adjustable angle A with respect to the intermediary shaft portion 30 of the of surgical stapling device 3, wherein the angle A is preferably adjustable in the range from 0 to 90°, wherein 0° corresponds to the distal end portion 32 being aligned with the intermediary shaft portion 30 of the surgical stapling device 3.
  • the surgical stapling device 3 can comprise a spacer 41 connected to the surgical stapling device 3, wherein said spacer 41 is configured to contact the shaft 20 of the tissue forceps 2 and slide along said shaft 20.
  • the forceps 2 forms on one side a guiding rail for the surgical stapling device 3.
  • the spacer 41 is configured to be moved, particularly pivoted, from a retracted position (in which the spacer 41 is e.g., flush with a surface of the surgical stapling device 3) into an advanced position, in which the spacer 41 protrudes from the surgical stapling device 3 as shown in Fig. 1 and is configured to contact and slide along the shaft 20 of the tissue forceps 2 for guiding the surgical stapling device 3 along the forceps 2 towards the inverted left atrial appendage.
  • the spacer 41 in order to pivot the spacer 41 from the retracted position to the advanced position, the spacer 41 can be hinged to the surgical stapling device 3, e.g., to the intermediary shaft portion 30, and can be actuated by means of a pulling wire to bring the spacer 41 from the retracted state to the advanced state.
  • the spacer 41 may also be mounted to the tissue forceps 2 instead (see also above).
  • the system 1 preferably comprises a guide wire 5 along which the tissue forceps 2 can be guided transseptally towards the left atrial appendage to invert the latter.
  • the tissue forceps 2 can comprise a lumen for receiving the guide wire 5.
  • the two opposing jaws 22 of the tissue forceps 2 form a distal tip 23 of the tissue forceps 2, wherein said lumen communicates with an opening 21 arranged on the shaft 20 of the tissue forceps 2, through which opening 21 the guide wire 5 can be moved, e.g. can be guided out of the shaft or can be retracted into the shaft.
  • the opening 21 is spaced apart from said distal tip 23, particularly by a distance D in the range from 1.5 cm to 2.5 cm.
  • the system 1 shown in Fig. 1 can be used as follows to perform a exclusion of the left atrial appendage, particularly of a patient suffering from AF.
  • the left atrial appendage is grasped via the transseptally inserted flexible and steerable tissue forceps 2 and inverted into the left atrium.
  • the forceps 2 serves as a guiding rail for the surgical stapling device 3 that can slide with its advanced spacer 41 along the shaft 20 of the forceps 2 upon transseptal insertion of the surgical stapling device 3 into the left atrium.
  • the distal tip 23 of the surgical stapling device 3 can be folded down by e.g., 90° and can maintain a defined distance from the forceps 2 by means of the retractable spacer 41.
  • the surgical stapling device 3 the inverted left atrial appendage is now closed in a blood-tight fashion by e.g., several rows of staples (usually 6) and preferably cut at the base.
  • the severed left atrial appendage can finally be removed, e.g., via the forceps 2.

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Abstract

The present invention relates to a medical system (1), preferably for exclusion of a left atrial appendage, comprising: a tissue forceps (2) configured to be inserted into the left atrium transseptally, to invert the left atrial appendage into the left atrium, and optionally to remove the severed left atrial appendage from the left atrium, a surgical connecting device (3) configured to be inserted into the left atrium transseptally and to apply at least one connection element (e.g. staple) to the inverted atrial appendage to close the inverted left atrial appendage in a blood-tight manner, the surgical connecting device (3) being optionally further configured to sever the closed inverted left atrial appendage at a base of the left atrial appendage, and a guiding structure (4) for guiding the surgical stapling device (3) along the tissue forceps (2) towards the inverted left atrial appendage.

Description

Endovascular stapling system for resection of the LAA
The present invention relates to a medical system, particularly an endovascular stapling / suture system, for exclusion of the left atrial appendage.
The left atrial appendage (LAA) lies within the confines of the pericardium in close relation to the free wall of the left ventricle. Typically, in patients showing atrial fibrillation (AF), thrombi can form in the LAA, which bear the high risk of causing a stroke.
To avoid the formation of thrombi, one strategy known in the prior art is to anticoagulate such patients for life.
Furthermore, surgically, the left atrial tube can be ligated and resected after thoracotomy. This however, is a very invasive procedure.
Further, currently, various occluder systems are used to fill and occlude the left atrial ear via a transseptal approach. The disadvantage of such approaches is that thrombi continue to form in the atrial ear, which can embolize if the atrial ear is not completely closed. Furthermore, anticoagulants must be given for a period of time, which is problematic because the indication for this procedure is actually only for patients with a contraindication to anticoagulants.
Particularly, US 2020/0229837 discloses a method of positioning an occlusion clip proximate a left atrial appendage that includes creating an access port that exposes the left atrial appendage; delivering a suction grasper via the access port, the suction grasper including opposing jaws each having a suction port; delivering an occlusion clip via the access port; grasping the left atrial appendage via the suction grasper by applying suction to an exterior of the left atrial appendage so that a portion of the left atrial appendage interposes the opposing jaws while suction is applied via the suction ports; repositioning the suction grasper to tension the left atrial appendage; delivering an occlusion clip via the access port; clamping a base of the left atrial appendage using the occlusion clip while the suction grasper applies tension to the left atrial appendage; and/or egressing the suction grasper via the access port.
Furthermore, US 2012/0179153 discloses a surgical instrument in which an elongated shaft is used in conjunction with a separate, remotely actuable tool head for performing a procedure on a target tissue. The shaft has a tool engagement member carried at its distal end that is remotely actuable through the shaft to engage and release the tool head.
Further, US 2013/0032627A1 discloses an articulation mechanism for use with a surgical instrument that includes a shaft, a first member disposed in mechanical cooperation with the articulation shaft, a second member disposed in mechanical cooperation with the shaft, and a flexible shaft having proximal and distal portions. The flexible member is operatively coupled to the first and second members. Upon rotation of the articulation shaft, at least one of the first and the second members moves longitudinally with respect to the other of the first and second members between a first position where the first and second members are approximated to each other and a second position where the first and second members are spaced apart from each other. This longitudinal motion causes the distal portion of the flexible member to articulate relative to the proximal portion.
Surgical stapling devices in general are known for example from US 2020/275925 Al, US 2008/294179 Al or US 5,403,326 A.
Regarding the above-described approaches to remedy the formation of thrombi in the LAA in patients with AF, the following disadvantages remain to be solved regarding said anti coagulation, surgical procedure and employed occluders. First of all, anti coagulation is always associated with the risk of severe bleeding, especially in elderly patients. Especially cerebral hemorrhages are feared. Thus, the use of excessive anticoagulation bears significant risks.
Furthermore, thoracotomy is a major invasive surgical procedure associated with significant pain and morbidity. Therefore, surgical intervention is not indicated only because of AF, but it is performed in combination with other cardiac surgical procedures (e.g., mitral valve repair, VCF ablation, etc.).
Finally, the complications of LAA occluders include thromboembolism, device embolism, perforation, etc., so that their use is currently limited to a small subgroup of AF patients who have a contraindication to long-term coagulation due to their increased risk of bleeding.
Based on the above, the problem to be solved by the present invention is to provide a medical system for exclusion of the LAA that allows an improved treatment of persons having atrial fibrillation. Particularly, it is desirable to provide a medical system that does not leave larger implants in the left atrium. Furthermore, it is desirable in particular to be able to exclude the atrial tube in such a way that no thromboembolism can result from the LAA.
This problem is solved by a medical system having the features of claim 1.
Preferred embodiments of these aspects of the present invention are stated in the dependent claims and will be described below.
According to claim 1, a medical system, preferably for exclusion of the left atrial appendage is disclosed, the medical system comprising:
- a tissue forceps configured to be inserted into the left atrium transseptally, to invert the left atrial appendage into the left atrium, and optionally to retrieve the severed left atrial appendage from the left atrium,
- a surgical connecting device configured to be inserted into the left atrium transseptally and to apply at least one connection element (such as a staple or suture for instance) to the inverted atrial appendage to close the inverted left atrial appendage in a blood-tight manner, wherein optionally the surgical stapling or suture device is further configured to sever the closed inverted left atrial appendage at a base of the left atrial appendage, and
- a guiding structure for guiding the surgical stapling device along the forceps (towards the inverted left atrial appendage).
Thus, particularly, the present invention aims at solving the above-described difficulties pertaining to the prior art by efficiently and safely excluding the left atrial appendage and optionally resecting and removing it via a transseptal approach. Particularly, the advantage of the solution according to the invention is that no implant remains in the left atrium, so that the patient does not have to be anticoagulated as in surgical resection.
According to an embodiment, the surgical connecting device can be a surgical stapling device configured to apply at least one connection element in form of a (surgical) staple to the inverted atrial appendage to close the inverted left atrial appendage. However, the surgical connecting device can also use means other than staples in order to seal the inverted left atrial appendage, for example a clamp, a clip, a device for applying a (Nitinol) suture, a glue or a rubber band.
According to an embodiment of the present invention, the tissue forceps is steerable allowing to curve the tissue forceps in a defined manner to allow a controlled access to the left atrium upon the transseptal approach.
Further, according to an embodiment of the present invention, the surgical connecting device comprises a deflectable distal end portion, the end portion being particularly connected in an articulate fashion (e.g., hinged) to an intermediary shaft portion of the surgical connecting device, said distal end portion being configured to apply said at least one staple.
Preferably, in an embodiment, said distal end portion is deflectable such that said end portion extends at an angle with respect to the intermediary shaft portion of the of surgical connecting device, the angle being smaller or equal to 90°.
Further, according to a preferred embodiment, the guiding structure comprises a spacer connected to the surgical connecting device, the spacer being configured to engage with and slide along a shaft of the tissue forceps. The tissue forceps thus acts as a guiding rail for the surgical connecting device allowing a defined delivery of the surgical connecting device to the site of the inverted left atrial appendage. The tissue forceps may form (only) on one side a guiding rail for the surgical connecting device, e.g. the surgical stapling device).
Particularly, in an embodiment, said spacer, for engaging with and sliding along the shaft of the tissue forceps, is configured to be moved from a retracted position into an advanced position, in which the spacer protrudes from the surgical connecting device and is configured to engage with and slide along the shaft of the tissue forceps for guiding the surgical connecting device along the tissue forceps towards the inverted atrial tube.
According to an alternative embodiment of the present invention, the guiding structure comprises a spacer connected to the tissue forceps, the spacer being configured to engage with and let a shaft portion (i.e., the intermediary shaft portion) of the surgical connecting device slide along the spacer. Here, particularly, the spacer, for letting the shaft portion of the surgical connecting device slide along the spacer, is configured to be moved from a retracted position into an advanced position, in which the spacer protrudes from the tissue forceps and is configured to contact the shaft portion of the surgical connecting device for guiding the latter along the spacer of the tissue forceps towards the inverted left atrial appendage.
Furthermore, according to an embodiment of the present invention, the medical system comprises a guide wire, wherein the tissue forceps comprises a lumen for receiving the guide wire to guide the tissue forceps along the guide wire towards the left atrial appendage. Particularly, the tissue forceps comprises two opposing jaws for grasping tissue, the two jaws forming a tip in a closed stated of the jaws, wherein said lumen is connected to an opening arranged on a shaft of the tissue forceps, through which opening the guide wire is insertable into the lumen, wherein particularly the opening is spaced apart from said tip, particularly by a distance in the range of 1.5 cm to 2.5 cm. According to yet another aspect of the present invention, a method for resecting a left atrial appendage using a medical system according to the present invention is disclosed, the method comprising the steps of:
- Grasping the left atrial appendage via the tissue forceps inserted transseptally into the left atrium,
- Inverting the left atrial appendage into the left atrium,
- Closing the inverted left atrial appendage by applying at least one connecting element, preferably a staple to the inverted left atrial appendage using the surgical connecting device inserted transseptally into the left atrium to close the left atrial appendage in a blood-tight manner.
Further, in an embodiment of the method, the method can further comprise the step of cutting the closed inverted left atrial appendage at a base of the left atrial appendage with the surgical connecting device. According to yet another embodiment, the method can comprise the step of removing the severed left atrial appendage from the left atrium using the tissue forceps in particular. As described above, the surgical connecting device can be a surgical stapling device.
All variants and embodiments that are described herein in connection with the claimed medical system can be arbitrarily combined with one another and applied individually, or in any combination, to the described method for resecting the left atrial appendage.
In the following embodiments as well as further features and advantages of the present invention are described with reference to the Figure, wherein
Fig. 1 shows an embodiment of a medical device according to the present invention
Fig. 1 shows a schematical illustration of an embodiment of a medical system 1 according to the present invention, the medical system 1 being adapted for exclusion of a left atrial appendage, wherein the medical system 1 comprises a tissue forceps 2 configured to be inserted into the left atrium transseptally, to invert the left atrial appendage into the left atrium, and optionally to completely remove the severed left atrial appendage from the left atrium. Furthermore, the system 1 comprises a surgical connecting device 3 configured to be inserted into the left atrium transseptally, too, and to apply at least one connection element to the inverted atrial appendage to close the inverted left atrial appendage in a blood-tight manner. In the following, the invention is described with the surgical connection device 3 being a surgical stapling device 3 configured to apply at least one staple as connection element, but other suitable connection elements can also be used in the context of the present invention. Furthermore, in an embodiment, the surgical stapling device 3 is configured to cut the closed inverted left atrial appendage at a base of the left atrial appendage to eventually allow removal of the atrial appendage by means of the tissue forceps 2. Preferably, the system 1 comprises a guiding structure 4 for guiding the surgical stapling device 3 along the tissue forceps 2 towards the inverted left atrial appendage. Furthermore, preferably, to allow precise positioning of the tissue forceps 2 in the left atrium, the tissue forceps 2 is steerable. For this, the tissue forceps 2 can comprise a steerable shaft 20 to which two jaws 22 for grasping tissue (e.g., the left atrial appendage) are connected.
Furthermore, preferably, the surgical stapling device 3 comprises a deflectable distal end portion 32, the end portion 32 being hinged via a suitable joint 31 to an intermediary shaft portion 30 of the surgical stapling device 3. Particularly, said distal end portion 32 of the surgical stapling device 3 is configured to apply said at least one staple. Further, particularly, the surgical stapling device 3 comprises two opposing jaws 33 for clamping the tissue upon stapling and applying the staples. Furthermore, one or two of the jaws can comprise a blade for cutting the tissue (e.g., left atrial appendage), e.g., after it has been stapled.
In order to be able to position the distal end portion 32 of the surgical stapling device 3 at the site of the inverted left atrial appendage, said distal end portion 32 is preferably deflectable such that said end portion 32 extends at an adjustable angle A with respect to the intermediary shaft portion 30 of the of surgical stapling device 3, wherein the angle A is preferably adjustable in the range from 0 to 90°, wherein 0° corresponds to the distal end portion 32 being aligned with the intermediary shaft portion 30 of the surgical stapling device 3. To also support a defined and controlled approach of the surgical stapling device 3 towards the site of the inverted left atrial appendage that is to be stapled blood-tight and cut off thereafter, the surgical stapling device 3 can comprise a spacer 41 connected to the surgical stapling device 3, wherein said spacer 41 is configured to contact the shaft 20 of the tissue forceps 2 and slide along said shaft 20. Thus, the forceps 2 forms on one side a guiding rail for the surgical stapling device 3. Particularly, the spacer 41 is configured to be moved, particularly pivoted, from a retracted position (in which the spacer 41 is e.g., flush with a surface of the surgical stapling device 3) into an advanced position, in which the spacer 41 protrudes from the surgical stapling device 3 as shown in Fig. 1 and is configured to contact and slide along the shaft 20 of the tissue forceps 2 for guiding the surgical stapling device 3 along the forceps 2 towards the inverted left atrial appendage. Particularly, in order to pivot the spacer 41 from the retracted position to the advanced position, the spacer 41 can be hinged to the surgical stapling device 3, e.g., to the intermediary shaft portion 30, and can be actuated by means of a pulling wire to bring the spacer 41 from the retracted state to the advanced state. Of course, alternatively, the spacer 41 may also be mounted to the tissue forceps 2 instead (see also above).
Furthermore, as indicated in Fig. 1, the system 1 preferably comprises a guide wire 5 along which the tissue forceps 2 can be guided transseptally towards the left atrial appendage to invert the latter. The tissue forceps 2 can comprise a lumen for receiving the guide wire 5. Particularly, the two opposing jaws 22 of the tissue forceps 2 form a distal tip 23 of the tissue forceps 2, wherein said lumen communicates with an opening 21 arranged on the shaft 20 of the tissue forceps 2, through which opening 21 the guide wire 5 can be moved, e.g. can be guided out of the shaft or can be retracted into the shaft. Particularly the opening 21 is spaced apart from said distal tip 23, particularly by a distance D in the range from 1.5 cm to 2.5 cm.
The system 1 shown in Fig. 1 can be used as follows to perform a exclusion of the left atrial appendage, particularly of a patient suffering from AF. In a first step, the left atrial appendage is grasped via the transseptally inserted flexible and steerable tissue forceps 2 and inverted into the left atrium. The forceps 2 serves as a guiding rail for the surgical stapling device 3 that can slide with its advanced spacer 41 along the shaft 20 of the forceps 2 upon transseptal insertion of the surgical stapling device 3 into the left atrium. Particularly, the distal tip 23 of the surgical stapling device 3 can be folded down by e.g., 90° and can maintain a defined distance from the forceps 2 by means of the retractable spacer 41. By means of the surgical stapling device 3, the inverted left atrial appendage is now closed in a blood-tight fashion by e.g., several rows of staples (usually 6) and preferably cut at the base. The severed left atrial appendage can finally be removed, e.g., via the forceps 2.

Claims

Claims
1. A medical system (1) comprising:
- a tissue forceps (2) configured to be inserted into the left atrium transseptally, to invert the left atrial appendage into the left atrium,
- a surgical connecting device (3) configured to be inserted into the left atrium transseptally and to apply at least one connection element to the inverted atrial appendage to close the inverted left atrial appendage in a blood-tight manner, and
- a guiding structure (4) for guiding the surgical connecting device (3) along the tissue forceps (2) towards a distal tip (23) of the tissue forceps (2), wherein the guiding structure (4) is formed by a spacer (41) connected to the surgical connecting device (3), characterized in that the spacer (41) is configured to slide along a shaft (20) of the tissue forceps (2).
2. The medical system according to claim 1, wherein the tissue forceps (2) is steerable.
3. The medical system according to claim 1 or 2, wherein the surgical connecting device (3) comprises a deflectable distal end portion (32), the end portion being connected to an intermediary shaft portion (30) of the surgical connecting device (3), said distal end portion (32) being configured to apply said at least one connection element.
4. The medical system according to claim 3, wherein said distal end portion (32) is deflectable such that said end portion (32) extends at an angle (A) with respect to the intermediary shaft portion (30) of the of surgical connecting device (3), the angle (A) being smaller or equal to 90°, preferably between 45° and 90°.
5. The medical system according to one of the preceding claims, wherein the tissue forceps (2) forms on one side a guiding rail for the surgical connecting device (3).
6. The medical system according to claim 5, wherein the spacer (41) for sliding along the shaft (20) of the tissue forceps (2) is configured to be moved from a retracted position into an advanced position, in which the spacer (41) protrudes from the surgical connecting device (3) and is configured to slide along the shaft (20) of the tissue forceps (2). The medical system according to one of the claims 1 to 4, wherein the guiding structure (4) is formed by a spacer (41) connected to the tissue forceps (2), the spacer (41) being configured to let a shaft portion of the surgical connecting device slide along the spacer (41). The medical system according to claim 7, wherein the spacer (41), for letting the shaft portion of the surgical connecting device slide along the spacer, is configured to be moved from a retracted position into an advanced position, in which the spacer protrudes from the tissue forceps (2) and is configured to let the shaft portion (30) of the surgical connecting device (30) slide along the spacer (41) for guiding the surgical connecting device (30) along the spacer (41), preferably towards the inverted left atrial appendage. The medical system according to one of the preceding claims, wherein the medical system (1) comprises a guide wire (5), wherein the tissue forceps (2) comprises a lumen for receiving the guide wire (5) to guide the tissue forceps (2) along the guide wire (5), preferably towards the left atrial appendage. The medical system according to one of the preceding claims, wherein the tissue forceps is further configured to remove the severed left atrial appendage from the left atrium. The medical system according to one of the preceding claims, wherein the surgical connecting device (3) is further configured to sever the closed inverted left atrial appendage at a base of the left atrial appendage. The medical system according to one of the preceding claims, wherein the surgical connecting device (3) is a surgical stapling device (3) configured to apply at least one connection element in form of a staple to the inverted atrial appendage to close the inverted left atrial appendage in a blood-tight manner. The medical system according to one of the preceding claims, wherein the shaft (20) of the tissue forceps (2) is connected to the distal tip (23). The medical system according to one of the preceding claims, wherein the tissue forceps (2) comprises a lumen for receiving a guide wire (5), and wherein the lumen communicates with an opening (21) arranged on the shaft (20) through which opening (21) the guide wire (5) can be moved. The medical system according to one of claims 3 to 14, wherein the distal end portion (32) is connected to the intermediary shaft portion (30) via a joint (31). The medical system (1) according to one of the preceding claims for use in resecting a left atrial appendage.
PCT/EP2023/063602 2022-05-23 2023-05-22 Endovascular stapling system for resection of the laa WO2023227506A1 (en)

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EP22174739.7 2022-05-23

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US5403326A (en) 1993-02-01 1995-04-04 The Regents Of The University Of California Method for performing a gastric wrap of the esophagus for use in the treatment of esophageal reflux
US20080294179A1 (en) 2007-05-12 2008-11-27 Balbierz Daniel J Devices and methods for stomach partitioning
US20120179153A1 (en) 2007-04-02 2012-07-12 Salvatore Privitera Surgical instrument with separate tool head and method of use
US20130032627A1 (en) 2007-10-05 2013-02-07 Covidien Lp Surgical Stapler Having an Articulation Mechanism
US20200229837A1 (en) 2019-01-23 2020-07-23 Atricure, Inc. Left atrial appendage manipulation and traction
US20200275925A1 (en) 2019-03-01 2020-09-03 Boston Scientific Scimed, Inc. Systems, devices, and related methods for fastening tissue

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5403326A (en) 1993-02-01 1995-04-04 The Regents Of The University Of California Method for performing a gastric wrap of the esophagus for use in the treatment of esophageal reflux
US20120179153A1 (en) 2007-04-02 2012-07-12 Salvatore Privitera Surgical instrument with separate tool head and method of use
US20080294179A1 (en) 2007-05-12 2008-11-27 Balbierz Daniel J Devices and methods for stomach partitioning
US20130032627A1 (en) 2007-10-05 2013-02-07 Covidien Lp Surgical Stapler Having an Articulation Mechanism
US20200229837A1 (en) 2019-01-23 2020-07-23 Atricure, Inc. Left atrial appendage manipulation and traction
US20200275925A1 (en) 2019-03-01 2020-09-03 Boston Scientific Scimed, Inc. Systems, devices, and related methods for fastening tissue

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