WO2014139642A1 - Two-stage venous cannula - Google Patents

Two-stage venous cannula Download PDF

Info

Publication number
WO2014139642A1
WO2014139642A1 PCT/EP2014/000536 EP2014000536W WO2014139642A1 WO 2014139642 A1 WO2014139642 A1 WO 2014139642A1 EP 2014000536 W EP2014000536 W EP 2014000536W WO 2014139642 A1 WO2014139642 A1 WO 2014139642A1
Authority
WO
WIPO (PCT)
Prior art keywords
stage
draining
inlets
cannula
blood
Prior art date
Application number
PCT/EP2014/000536
Other languages
French (fr)
Inventor
Francesco Greco
Original Assignee
Bioengineering Laboratories S.P.A.
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 Bioengineering Laboratories S.P.A. filed Critical Bioengineering Laboratories S.P.A.
Priority to EP14713755.8A priority Critical patent/EP2968839A1/en
Publication of WO2014139642A1 publication Critical patent/WO2014139642A1/en

Links

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
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • A61M25/0069—Tip not integral with tube
    • 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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3621—Extra-corporeal blood circuits
    • A61M1/3653—Interfaces between patient blood circulation and extra-corporal blood circuit
    • A61M1/3659—Cannulae pertaining to extracorporeal circulation
    • 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
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • A61M25/007—Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
    • 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
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • A61M2025/0073—Tip designed for influencing the flow or the flow velocity of the fluid, e.g. inserts for twisted or vortex flow
    • 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
    • A61M25/0043—Catheters; Hollow probes characterised by structural features
    • A61M25/0054—Catheters; Hollow probes characterised by structural features with regions for increasing flexibility

Definitions

  • the present contrivance is in the category of the venous cannulae used in cardio surgery, particularly in the extra corporeal circulation for draining blood from a patient under an operation requiring separation of the heart from the rest of the blood circulation.
  • the two- stage venous cannulae designed to make blood circulate under smallest possible turbulence, are strong enough to prevent them from kinking or collapsing during an operation, but at the same time they are flexible enough to be easily manoeuvred.
  • Two types of two-stage venous cannulae are currently known, some made of more elements and others are monolithic.
  • the first ones are in four parts: a tip, two tubes, one distal and one proximal, different in extension and adapted to be armoured, and a basket as connection means between the two tubes.
  • the second type comprises the same parts of the first one, but is one piece made.
  • the inlets for draining venous blood are made in the distal and intermediate parts in the cannula.
  • the invented venous cannula is made of two elements only, joined together by gluing or any suitable watertight mode: a first stage of circular or oval cross section, with a truncated conical basket part, is provided with a plurality of blood draining inlets and a second flexible stage as conduit for the blood flow and cannula manoeuvring means, the two elements being connected by gluing or other waterproof mode.
  • the first stage may be made by molding suitable plastic material and the second stage may be made by a dipping process as a thin-polyurethane walled on a steel spiral which gives it the flexibility required by the operators.
  • Fig. 1 is a side view.
  • the figure shows a cannula 1 made of a first stage 4 and a second stage 3.
  • a cylindrical part 4 and one truncated conical part 10 are provided where the proximal end of the conical part 10 is suitable to join the adjacent distal end of the second stage 3 in the junction section 11.
  • the first stage 4, 10 cm long and comprising at the proximal end said truncated conical basket part 10, 2 cm long, is shaped at the distal end as an elongated tip part 6 provided with a front central draining inlet 7 and side draining inlets 7a all around the circumference and extends in a tubular element 5 bearing a plurality of draining inlets 8 all around the circumference and along its extension
  • the truncated conical basket part 10, an extension of the tubular part 5 bears all around the circumference a plurality of draining inlets 9.
  • the proximal head 2 of the second stage 3 is in the form of a sleeve suitable for coupling a surgical element, not shown. It goes without saying, such cannulae may have a variety of sizes according to a number of requirements in this field.

Abstract

Blood draining inlets (7, 7a, 8, 9) are made in the first stage (4) of the cannula (1) and the cannula manoeuvre means (3) is the second stage, the first and second stages being waterproof connected together through a truncated conical basket element (10).

Description

Title: Two-stage venous cannula..
Field of the Invention.
The present contrivance is in the category of the venous cannulae used in cardio surgery, particularly in the extra corporeal circulation for draining blood from a patient under an operation requiring separation of the heart from the rest of the blood circulation. The two- stage venous cannulae, designed to make blood circulate under smallest possible turbulence, are strong enough to prevent them from kinking or collapsing during an operation, but at the same time they are flexible enough to be easily manoeuvred.
State of the Art.
Two types of two-stage venous cannulae are currently known, some made of more elements and others are monolithic. The first ones are in four parts: a tip, two tubes, one distal and one proximal, different in extension and adapted to be armoured, and a basket as connection means between the two tubes. The second type comprises the same parts of the first one, but is one piece made. In both types, the inlets for draining venous blood are made in the distal and intermediate parts in the cannula.
Drawbacks in the state of the art.
The drawbacks in the state of the art are a consequence of the construction methods used for such cannulae, which methods have a negative impact in the operating room. In fact, in the first type of cannulae the four parts involve three bonding sections which increase the probability of detachment of one part from another one as well as a relatively long production time and consequent costs. The monolithic cannulae, as a single piece, require a high accuracy in the production and in making the draining inlets, which also increases the production cost.
Background of the invention.
The invented venous cannula is made of two elements only, joined together by gluing or any suitable watertight mode: a first stage of circular or oval cross section, with a truncated conical basket part, is provided with a plurality of blood draining inlets and a second flexible stage as conduit for the blood flow and cannula manoeuvring means, the two elements being connected by gluing or other waterproof mode.
Conventionally, the first stage may be made by molding suitable plastic material and the second stage may be made by a dipping process as a thin-polyurethane walled on a steel spiral which gives it the flexibility required by the operators.
Advantages of the invention.
The main advantages of this invented cannula are the following:
- the blood drainage is plentifull and fast, does not disturb the cannula into the surgical space and safeguards the emolysis;
- the two-part construction reduces the risk of faults for the producer and the production cost;
- negative events in an operating room are minimized thanks to the existing single connection section between the first and second stage.
An example of embodiment.
The invention will now be described by way of example with reference to the drawing in which
Fig. 1 is a side view.
The figure shows a cannula 1 made of a first stage 4 and a second stage 3. A cylindrical part 4 and one truncated conical part 10 are provided where the proximal end of the conical part 10 is suitable to join the adjacent distal end of the second stage 3 in the junction section 11. The first stage 4, 10 cm long and comprising at the proximal end said truncated conical basket part 10, 2 cm long, is shaped at the distal end as an elongated tip part 6 provided with a front central draining inlet 7 and side draining inlets 7a all around the circumference and extends in a tubular element 5 bearing a plurality of draining inlets 8 all around the circumference and along its extension The truncated conical basket part 10, an extension of the tubular part 5, bears all around the circumference a plurality of draining inlets 9. The proximal head 2 of the second stage 3 is in the form of a sleeve suitable for coupling a surgical element, not shown. It goes without saying, such cannulae may have a variety of sizes according to a number of requirements in this field.

Claims

Claims.
1. Two-stage venous cannula (1) comprising a cylindrical or oval element (4) suitable for draining blood through blood draining inlets and a flexible element (3) as conduit for the blood flow and cannula manoeuvring means, characterized in that the blood draining inlets (7, 7a, 8, 9) are provided in the first stage (4) and the manoeuvre means is the second stage (3), first and second stages being waterproof connected together.
2. Two-stage venous cannula (1) according to claim 1 characterized in that the distal end of the first stage (4) is in the form of an elongated tip part (6) bearing a front central draining inlet (7) and side draining inlets (7a) all around the perimeter and the elongated tip part (6) extends in a tubular part (5) bearing a plurality of draining inlets (8) all around the perimeter and along its extension and turning the proximal end in a truncated conical basket part (10) suitable for joining to the second stage (3) with its larger circumference.
3. Two-stage venous cannula (1) according to claims 1, 2 characterized in that the truncated conical basket part (10) comprises a plurality of draining inlets (9) all around the perimeter.
PCT/EP2014/000536 2013-03-11 2014-03-04 Two-stage venous cannula WO2014139642A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14713755.8A EP2968839A1 (en) 2013-03-11 2014-03-04 Two-stage venous cannula

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20130084 ITMI20130084U1 (en) 2013-03-11 2013-03-11 "DOUBLE STAGE VENOUS CANNULA"
ITMI2013U000084 2013-03-11

Publications (1)

Publication Number Publication Date
WO2014139642A1 true WO2014139642A1 (en) 2014-09-18

Family

ID=49484945

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/000536 WO2014139642A1 (en) 2013-03-11 2014-03-04 Two-stage venous cannula

Country Status (3)

Country Link
EP (1) EP2968839A1 (en)
IT (1) ITMI20130084U1 (en)
WO (1) WO2014139642A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4639252A (en) * 1985-04-05 1987-01-27 Research Medical, Inc. Venous return catheter
EP0299622A2 (en) * 1987-07-17 1989-01-18 Minnesota Mining And Manufacturing Company Venous return catheter
WO1997047230A2 (en) * 1996-06-13 1997-12-18 Medtronic, Inc. Two-staged venous cannula with expandable reinforcing member
EP1304133A2 (en) * 2001-10-18 2003-04-23 Terumo Cardiovascular Systems Corporation Reinforced venous drainage catheter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE449053B (en) * 1986-01-16 1987-04-06 Gambro Cardio Ab Hjert CATHETER

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4639252A (en) * 1985-04-05 1987-01-27 Research Medical, Inc. Venous return catheter
EP0299622A2 (en) * 1987-07-17 1989-01-18 Minnesota Mining And Manufacturing Company Venous return catheter
WO1997047230A2 (en) * 1996-06-13 1997-12-18 Medtronic, Inc. Two-staged venous cannula with expandable reinforcing member
EP1304133A2 (en) * 2001-10-18 2003-04-23 Terumo Cardiovascular Systems Corporation Reinforced venous drainage catheter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2968839A1 *

Also Published As

Publication number Publication date
EP2968839A1 (en) 2016-01-20
ITMI20130084U1 (en) 2014-09-12

Similar Documents

Publication Publication Date Title
US11344659B2 (en) Dual lumen cannula
US6558355B1 (en) Flushable guidewire device
US7871398B2 (en) Catheter with larger proximal end portion
JP4778956B2 (en) Double balloon catheter
EP3827764A3 (en) Actuated expandable mouth thrombectomy catheter
CN103706016A (en) Symmetrical tip acute catheter
US10098994B2 (en) Blood processing unit with heat exchanger core for providing modified flow path
WO2016011091A1 (en) Apparatuses, systems, and methods for inserting split tip catheters having enhanced stiffening and guiding features
US20210069397A1 (en) Circulatory support device with integrated cannula
CN109069792A (en) The manufacturing method of percutaneous catheter and percutaneous catheter pipe
US20170239442A1 (en) Catheter
US20160058973A1 (en) Malleable cannula
JP5844585B2 (en) Blood processing unit having a modified flow path
WO2014139642A1 (en) Two-stage venous cannula
JP6030210B2 (en) Blood processing unit having a modified flow path
US20070293804A1 (en) Set of units for a device integrated in an extracorporeal blood circuit
US20170087332A1 (en) Aortic cannula with de-air function
CN101020092A (en) Angiography catheter with controllable tip direction
JP2006280668A (en) Suction catheter and its manufacturing method
JP2016135216A (en) Balloon catheter
JP2005237863A (en) Catheter and its manufacturing method
US8585679B2 (en) Even-flow multi-stage cannula
JPWO2017175530A1 (en) Percutaneous catheter
US20220126069A1 (en) Catheter
CN206492093U (en) A kind of Combined type drainage tube

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14713755

Country of ref document: EP

Kind code of ref document: A1

DPE2 Request for preliminary examination filed before expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2014713755

Country of ref document: EP