WO2024079685A1 - Endoscope with water flushing system - Google Patents

Endoscope with water flushing system Download PDF

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Publication number
WO2024079685A1
WO2024079685A1 PCT/IB2023/060300 IB2023060300W WO2024079685A1 WO 2024079685 A1 WO2024079685 A1 WO 2024079685A1 IB 2023060300 W IB2023060300 W IB 2023060300W WO 2024079685 A1 WO2024079685 A1 WO 2024079685A1
Authority
WO
WIPO (PCT)
Prior art keywords
endoscope
peristaltic pump
water
channel
biopsy
Prior art date
Application number
PCT/IB2023/060300
Other languages
French (fr)
Inventor
Giuseppinella MELITA
Socrate PALLIO
Claudio Romano
Fabrizio D'ANTONIO
Andrea TORTORA
Original Assignee
Universita' Degli Studi Di Messina
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 Universita' Degli Studi Di Messina filed Critical Universita' Degli Studi Di Messina
Publication of WO2024079685A1 publication Critical patent/WO2024079685A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00112—Connection or coupling means
    • A61B1/00119—Tubes or pipes in or with an endoscope
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
    • A61B1/015—Control of fluid supply or evacuation

Definitions

  • the present invention relates to a water flushing system in the context of digestive endoscopy .
  • Known water flushing ( or irrigation) systems used in digestive endoscopy can irrigate fluids either through the biopsy channel ( or operator channel ) of the endoscope or through a water channel of the endoscope . This allows the gastric mucosa and colon to be washed during endoscopic procedures in order to improve the vision of the gastrointestinal tracts examined .
  • the water is pressuri zed by a fixed peristaltic pump .
  • a disadvantage of flushing systems of the aforementioned type is that they use pumps with a fixed flow rate and low power ( about 100 VA) , so that the irrigation obtainable is fixed and the flow o f water is weak ( about 45 1/h) , and therefore not always e f fective in removing any large blood clots or solid residues present in certain situations in the gastrointestinal tracts , which obstruct the operator ' s vision .
  • flushing systems allow irrigation through an auxiliary water channel , using an external valve .
  • the amount of water that can be delivered by these systems is however very small and their use is generally limited to the removal of blood clots , not always success fully .
  • the obj ect of the invention i s to overcome the limitations of known water flushing systems by providing an endoscope equipped with a water flushing system in which the flow of water is controllable and enhanced .
  • the endoscope according to the invention comprises an insertion tube having a distal end, a biopsy ( and aspiration ) channel , a peristaltic pump and a first water tank .
  • the biopsy channel extends from its first open end, at the distal end of the insertion tube , to a discharge tube o f the peristaltic pump .
  • the peristaltic pump is connected, upstream, to the aforementioned first water tank .
  • the peristaltic pump is a variable flow rate pump .
  • the flow rate is preferably between 30 and 180 1/h, more preferably between 50 and 180 1/h .
  • the flow rate is also adj ustable by the operator, by changing the rotation speed of the pump, for example by means of a special pedal .
  • the peristaltic pump is reversible .
  • the peristaltic pump is preferably provided with a shutof f valve on the discharge tube .
  • the peristaltic pump has a power preferably comprised between 400 and 500 VA, clearly higher than that of the pumps in use in known flushing systems .
  • the peristaltic pump includes consumables that are sterile and do not require treatment before use .
  • the discharge tube of the peristaltic pump is preferably connected to the biopsy channel via an aspiration outlet of the endoscope .
  • the discharge tube of the peristaltic pump is preferably connected to the biopsy channel via an outlet for biopsy of the endoscope .
  • the endoscope with water flushing system therefore provides for the flushing of water through the biopsy channel of the endoscope , larger than the water channel , with the possibility of dispensing a greater amount of water ( about 4 times higher ) and with a higher flow rate than the use of the aforementioned water channel .
  • the endoscope with flushing system according to the invention is thus particularly useful in removing large clots or solid residues that are present in certain situations within the gastrointestinal tracts and that often lead to an extension of the endoscopic examination execution times and sometimes to non-diagnostic examinations with the need to repeat the endoscopic examination again .
  • Fig . 1 represents a schematic diagram of an endoscope with a water flushing system according to a first embodiment of the invention
  • Fig . 2 represents a schematic diagram of an endoscope with a water flushing system according to a second embodiment of the invention .
  • the endoscope 10 comprises an insertion tube 11 having a distal end Ila and a second end 11b connected to a central body 15. Said central body 15 is in turn connected, by means of a special light-guiding cable 20, generally flexible, to a light source 22. Generally, the light source 22 is connected to the aforementioned light-guiding cable 20 by means of a special connector 21, of known type.
  • the endoscope 10 comprises a biopsy (and aspiration) channel 30 extending from a first open end thereof, at the distal end Ila of the insertion tube 11, through the entire insertion tube 11 to the central body 15 and from there, through the light-guiding cable 20, to a suction outlet 35.
  • the biopsy channel 30 provides, in the central body 15, a bifurcation 31 from which a branch 32 of the biopsy channel departs that reaches a biopsy outlet 33 (equipped with a biopsy valve 34) .
  • the endoscope 10 further comprises an air channel 50 extending from a first open end thereof, at the distal end Ila of the insertion tube 11, through the entire insertion tube 11 to the central body 15 and from there, through the light-guiding cable 20, to a bifurcation 51. Upstream of the bi furcation 51 , a first branch 52 of the air channel is connected to an air pump 54 , and a second branch 53 of the air channel flows into the head space 56 of a water tank 55 .
  • the endoscope 10 further comprises a water channel 60 extending from a first end thereof , which flows into the air channel 50 j ust before the first end thereof , through the entire insertion tube 11 to the central body 15 and from there , through the light-guiding cable 20 , to the water tank 55 .
  • auxiliary water inlet 61 through which the water channel 60 is connected to an auxiliary water channel 62 , upstream o f which there is a syringe 63 , operable by the operator for slow flushing and sending small f lows of water for washing any bleeding .
  • the endoscope 10 comprises , in a known manner, a first pump (not shown) connected to the water channel 60 or to the biopsy channel 30 .
  • the biopsy channel 30 is connected, upstream of the suction outlet 35 , to a peristaltic pump 40 , which is provided with a shutof f valve 41 on a discharge tube 42 and is connected, upstream, to a water tank 43 .
  • the peristaltic pump 40 allows a j et of irrigation water to be sent through the biopsy channel 30 , in order to remove deposits or clots that obstruct vision within gastrointestinal tracts during endoscopic examination .
  • the peristaltic pump 40 is a variable and reversible flow pump, so that it can also be used for the suction phase .
  • the flow rate of the pump 40 is adj usted by the operator by changing the rotation speed, for example by means of a pedal (not shown) , and can reach values up to 180 1/h .
  • the shutof f valve 41 is used to stop the flow of water when disconnection from the endoscope is necessary .
  • the peristaltic pump 40 has a power preferably comprised between 400 and 500 VA, clearly higher than that of the pumps in use in known flushing systems .
  • the consumables of the peristaltic pump 40 are sterile and do not require treatment prior to use .
  • the discharge tube 42 is also intended for a single use , in order to avoid contamination between patients .
  • the flow of water passes through the biopsy channel 30 , which is known to have a diameter about 3 times larger than that of the water channel 60 .
  • the diameter of the current known biopsy channels it is not necessary to change the diameter of the current known biopsy channels for the purposes of the invention .
  • the aforementioned water flushing system it is possible to provide a flow of water through the biopsy channel 30 with a high flow rate ( greater than about 4 times the current one ) .
  • a flow of water is able to dissolve large blood clots during emergency endoscopies or allow rapid removal of large amounts of residues in patients not suf ficiently prepared to undergo endoscopic examination .
  • This allows , for example , a clear vision during the haemostasis procedure , both in adult patients and in children, and improves the performance of the endoscopic examination according to the "underwater” technique .
  • the flow of water with high flow rate allows to quickly fill the organs for the execution of echoendoscopic examinations .
  • a second embodiment o f the endoscope 110 provides that the peristaltic pump 40 is connected to the biopsy channel 30 via the biopsy outlet 33 .
  • the peristaltic pump 40 is active for sending a j et of irrigation water through the biopsy channel 30 , the suction valve 16 is closed, preventing the passage of water towards the portion of the biopsy channel 30 comprised between the suction valve 16 and the suction outlet 35 .
  • the other structural components of the endoscope 110 are similar to those described for the endoscope 10 of the first embodiment , which description is therefore referred to .

Abstract

Endoscope (10; 110) comprising an insertion tube (11), having a distal end (11a), a biopsy channel (30), a peristaltic pump (40) and a water tank (43). The biopsy channel (30) extends from a first open end thereof, at the distal end (11a) of the insertion tube (11), to a discharge tube (42) of the peristaltic pump (40). The peristaltic pump (40) is connected, upstream, to the water tank (43) and is a variable flow pump, in which the flow rate is adjustable by the operator.

Description

DESCRIPTION
"Endoscope with water flushing system"
Field of the Art
The present invention relates to a water flushing system in the context of digestive endoscopy .
Prior Art
Known water flushing ( or irrigation) systems used in digestive endoscopy can irrigate fluids either through the biopsy channel ( or operator channel ) of the endoscope or through a water channel of the endoscope . This allows the gastric mucosa and colon to be washed during endoscopic procedures in order to improve the vision of the gastrointestinal tracts examined . In such known systems , the water is pressuri zed by a fixed peristaltic pump .
A disadvantage of flushing systems of the aforementioned type is that they use pumps with a fixed flow rate and low power ( about 100 VA) , so that the irrigation obtainable is fixed and the flow o f water is weak ( about 45 1/h) , and therefore not always e f fective in removing any large blood clots or solid residues present in certain situations in the gastrointestinal tracts , which obstruct the operator ' s vision . This involves a lengthening of the endoscopic examination execution times and sometimes non- diagnostic examinations , with the need to repeat the endoscopic examination again .
Alternatively, some flushing systems allow irrigation through an auxiliary water channel , using an external valve . The amount of water that can be delivered by these systems is however very small and their use is generally limited to the removal of blood clots , not always success fully .
The obj ect of the invention i s to overcome the limitations of known water flushing systems by providing an endoscope equipped with a water flushing system in which the flow of water is controllable and enhanced .
This and other obj ects are achieved with the endoscope as claimed in the appended claims .
Description of the invention
The endoscope according to the invention comprises an insertion tube having a distal end, a biopsy ( and aspiration ) channel , a peristaltic pump and a first water tank .
The biopsy channel extends from its first open end, at the distal end of the insertion tube , to a discharge tube o f the peristaltic pump .
The peristaltic pump is connected, upstream, to the aforementioned first water tank .
The peristaltic pump is a variable flow rate pump . The flow rate is preferably between 30 and 180 1/h, more preferably between 50 and 180 1/h . The flow rate is also adj ustable by the operator, by changing the rotation speed of the pump, for example by means of a special pedal .
The peristaltic pump is reversible .
The peristaltic pump is preferably provided with a shutof f valve on the discharge tube .
The peristaltic pump has a power preferably comprised between 400 and 500 VA, clearly higher than that of the pumps in use in known flushing systems .
The peristaltic pump includes consumables that are sterile and do not require treatment before use .
In accordance with one aspect of the invention, the discharge tube of the peristaltic pump is preferably connected to the biopsy channel via an aspiration outlet of the endoscope .
In accordance with a further aspect of the invention, the discharge tube of the peristaltic pump is preferably connected to the biopsy channel via an outlet for biopsy of the endoscope .
The endoscope with water flushing system according to the invention therefore provides for the flushing of water through the biopsy channel of the endoscope , larger than the water channel , with the possibility of dispensing a greater amount of water ( about 4 times higher ) and with a higher flow rate than the use of the aforementioned water channel .
The endoscope with flushing system according to the invention is thus particularly useful in removing large clots or solid residues that are present in certain situations within the gastrointestinal tracts and that often lead to an extension of the endoscopic examination execution times and sometimes to non-diagnostic examinations with the need to repeat the endoscopic examination again .
Summary Description of Figures
These and other characteristics and advantages of the present invention will become clear from the following description of preferred embodiments made by way of example and not limitation with the aid of the accompanying figures , in which elements indicated with the same or a similar numerical reference indicate elements having the same or similar functionality and construction and in which :
Fig . 1 represents a schematic diagram of an endoscope with a water flushing system according to a first embodiment of the invention;
Fig . 2 represents a schematic diagram of an endoscope with a water flushing system according to a second embodiment of the invention .
Description of Preferred Embodiments An endoscope 10 according to an embodiment of the present invention is described below with reference to Figure 1.
The endoscope 10 comprises an insertion tube 11 having a distal end Ila and a second end 11b connected to a central body 15. Said central body 15 is in turn connected, by means of a special light-guiding cable 20, generally flexible, to a light source 22. Generally, the light source 22 is connected to the aforementioned light-guiding cable 20 by means of a special connector 21, of known type.
The endoscope 10 comprises a biopsy (and aspiration) channel 30 extending from a first open end thereof, at the distal end Ila of the insertion tube 11, through the entire insertion tube 11 to the central body 15 and from there, through the light-guiding cable 20, to a suction outlet 35.
The biopsy channel 30 provides, in the central body 15, a bifurcation 31 from which a branch 32 of the biopsy channel departs that reaches a biopsy outlet 33 (equipped with a biopsy valve 34) .
The endoscope 10 further comprises an air channel 50 extending from a first open end thereof, at the distal end Ila of the insertion tube 11, through the entire insertion tube 11 to the central body 15 and from there, through the light-guiding cable 20, to a bifurcation 51. Upstream of the bi furcation 51 , a first branch 52 of the air channel is connected to an air pump 54 , and a second branch 53 of the air channel flows into the head space 56 of a water tank 55 .
The endoscope 10 further comprises a water channel 60 extending from a first end thereof , which flows into the air channel 50 j ust before the first end thereof , through the entire insertion tube 11 to the central body 15 and from there , through the light-guiding cable 20 , to the water tank 55 .
Optionally, in the central body 15 there is also an auxiliary water inlet 61 through which the water channel 60 is connected to an auxiliary water channel 62 , upstream o f which there is a syringe 63 , operable by the operator for slow flushing and sending small f lows of water for washing any bleeding .
In the main body 15 there is a suction valve 16 along the biopsy ( and suction) channel 30 , upstream of the biopsy outlet 33 , an air valve 17 along the air channel 50 and a water valve 18 along the water channel 60 , upstream of the auxiliary water inlet 61 . Through the aforementioned valves it is possible to select the channel (biopsy, air or water ) for the service to be operated and exclude the others . The endoscope 10 comprises , in a known manner, a first pump (not shown) connected to the water channel 60 or to the biopsy channel 30 .
In accordance with a preferred aspect of the invention, the biopsy channel 30 is connected, upstream of the suction outlet 35 , to a peristaltic pump 40 , which is provided with a shutof f valve 41 on a discharge tube 42 and is connected, upstream, to a water tank 43 .
The peristaltic pump 40 allows a j et of irrigation water to be sent through the biopsy channel 30 , in order to remove deposits or clots that obstruct vision within gastrointestinal tracts during endoscopic examination . The peristaltic pump 40 is a variable and reversible flow pump, so that it can also be used for the suction phase . The flow rate of the pump 40 is adj usted by the operator by changing the rotation speed, for example by means of a pedal (not shown) , and can reach values up to 180 1/h . The shutof f valve 41 is used to stop the flow of water when disconnection from the endoscope is necessary .
The peristaltic pump 40 has a power preferably comprised between 400 and 500 VA, clearly higher than that of the pumps in use in known flushing systems .
Advantageously, the consumables of the peristaltic pump 40 are sterile and do not require treatment prior to use . The discharge tube 42 is also intended for a single use , in order to avoid contamination between patients .
Advantageously, with the water flushing system according to the invention, the flow of water passes through the biopsy channel 30 , which is known to have a diameter about 3 times larger than that of the water channel 60 . Advantageously, it is not necessary to change the diameter of the current known biopsy channels for the purposes of the invention .
Thanks to the aforementioned water flushing system it is possible to provide a flow of water through the biopsy channel 30 with a high flow rate ( greater than about 4 times the current one ) . Such a flow of water is able to dissolve large blood clots during emergency endoscopies or allow rapid removal of large amounts of residues in patients not suf ficiently prepared to undergo endoscopic examination . This allows , for example , a clear vision during the haemostasis procedure , both in adult patients and in children, and improves the performance of the endoscopic examination according to the "underwater" technique . In addition, the flow of water with high flow rate allows to quickly fill the organs for the execution of echoendoscopic examinations . Referring to Figure 2 , a second embodiment o f the endoscope 110 according to the invention provides that the peristaltic pump 40 is connected to the biopsy channel 30 via the biopsy outlet 33 . When the peristaltic pump 40 is active for sending a j et of irrigation water through the biopsy channel 30 , the suction valve 16 is closed, preventing the passage of water towards the portion of the biopsy channel 30 comprised between the suction valve 16 and the suction outlet 35 . The other structural components of the endoscope 110 are similar to those described for the endoscope 10 of the first embodiment , which description is therefore referred to .

Claims

1. Endoscope (10; 110) comprising:
- an insertion tube (11) having a distal end (Ila) ,
- a biopsy channel (30) ,
- a peristaltic pump (40) , and
- a water tank (43) , wherein said biopsy channel (30) extends from a first open end thereof, at the distal end (Ila) of the insertion tube (11) , to a discharge tube (42) of the peristaltic pump (40) , wherein said peristaltic pump (40) is connected, upstream, to the water tank (43) , wherein said peristaltic pump (40) is a variable flow rate pump and is configured so that said flow rate is adjustable by an operator.
2. Endoscope (10; 110) according to claim 1, wherein the variable flow rate of the peristaltic pump (40) is comprised between 30 and 180 1/h.
3. Endoscope (10; 110) according to claim 1 or 2, wherein the peristaltic pump (40) is reversible.
4. Endoscope (10; 110) according to any one of the preceding claims, wherein the flow rate of the peristaltic pump (40) is adjusted by a foot pedal.
5. Endoscope (10; 110) according to any one of the preceding claims, wherein the peristaltic pump (40) is provided with a shutoff valve (41) on the discharge tube (42) .
6. Endoscope (10; 110) according to any one of the preceding claims, wherein the peristaltic pump (40) has a power between 400 and 500 VA.
7. Endoscope (10; 110) according to any one of the preceding claims, wherein the peristaltic pump (40) comprises consumables that are sterile.
8. Endoscope (10) according to any one of the preceding claims, wherein said discharge tube (42) of the peristaltic pump (40) is connected to the biopsy channel (30) through a suction outlet (35) of the endoscope (10) .
9. Endoscope (110) according to any one of claims 1 to
7, wherein said discharge tube (42) of the peristaltic pump (40) is connected to the biopsy channel (30) via a biopsy outlet (33) of the endoscope (110) .
PCT/IB2023/060300 2022-10-13 2023-10-12 Endoscope with water flushing system WO2024079685A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102022000021150 2022-10-13
IT202200021150 2022-10-13

Publications (1)

Publication Number Publication Date
WO2024079685A1 true WO2024079685A1 (en) 2024-04-18

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Country Status (1)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060106285A1 (en) * 2004-09-30 2006-05-18 Boston Scientific Scimed, Inc. Fluid delivery system for use with an endoscope
EP2266452A2 (en) * 2004-09-30 2010-12-29 Boston Scientific Limited Video endoscope
US20160270632A1 (en) * 2014-08-22 2016-09-22 Olympus Corporation Ultrasound endoscope, liquid feeding apparatus for ultrasound endoscope and ultrasound endoscope system
US20190104932A1 (en) * 2017-10-11 2019-04-11 Csaba Truckai Endoscope and method of use

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060106285A1 (en) * 2004-09-30 2006-05-18 Boston Scientific Scimed, Inc. Fluid delivery system for use with an endoscope
EP2266452A2 (en) * 2004-09-30 2010-12-29 Boston Scientific Limited Video endoscope
US20160270632A1 (en) * 2014-08-22 2016-09-22 Olympus Corporation Ultrasound endoscope, liquid feeding apparatus for ultrasound endoscope and ultrasound endoscope system
US20190104932A1 (en) * 2017-10-11 2019-04-11 Csaba Truckai Endoscope and method of use

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