WO2016146876A1

WO2016146876A1 - Double-body syringe

Info

Publication number: WO2016146876A1
Application number: PCT/ES2016/070173
Authority: WO
Inventors: Daniel MARTÍN MORAL
Original assignee: Martín Moral Daniel
Priority date: 2015-03-16
Filing date: 2016-03-16
Publication date: 2016-09-22
Also published as: ES1138206Y; ES1138206U

Abstract

The invention relates to a double-body syringe comprising two independent modules (1a, 1b) incorporating hollow bodies (3a, 3b) inside which are fitted movable plungers (4a, 4b) for expelling products contained inside said hollow bodies, wherein the products exit via first ends of the hollow bodies, while a part of each movable plunger projects out via second ends of the hollow bodies. Attached at the first ends of the hollow bodies are nozzles (5) forming starting points for ends of cannulas (6) which converge at their opposite ends and via which the products exit separately. At the second ends of the hollow bodies there are two opposing extensions (7) in the form of wings, on which the index and middle fingers of a user rest.

Description

DOUBLE BODY SYRINGE DESCRIPTION OBJECT OF THE INVENTION

The present invention, as expressed in the statement of this specification, refers to a double-body syringe containing two separate products to be injected simultaneously, also separately, so that both products are mixed in the area of application outside the syringe and not before. You can choose with the same product between simultaneous or separate use.

Therefore, the objective of the invention is to keep the products separated until they are injected into the application area where both products are mixed to fulfill the function to which they are intended.

It is also the object of the invention to be able to manufacture small syringes with very small contents of the products to be applied, thus avoiding wasting part of the products that are not used. With the syringe of the invention physiological hemostatic adhesive, suture reinforcement, cavity adhesive, fistula sealing, hemostatic healing stimulant, etc. can be applied.

It should be noted that the syringe of the invention can apply all kinds of bicomponent products, such as epoxy resins, other resins, glues, adhesives, plastics, etc.

TECHNICAL PROBLEM TO BE RESOLVED AND BACKGROUND OF THE INVENTION

At present, simple syringes are known which comprise a hollow body associated with a plunger whose displacement forces a product contained within the hollow body through a cannula or a needle connected to one end of said hollow body.

The cannula is a short terminal or end tube of the syringes that is used in different surgery operations or that is part of the physical or surgical devices themselves. The needle is also a small diameter metal tube, with the end free bevel cut.

Also known are the hollow double-body syringes associated with respective pistons containing different products that are then mixed in a common nozzle (mixing cannula or union nozzle) from which a single cannula starts through which the product mix leaves the exterior to apply where appropriate.

These double-body syringes comprise two hollow bodies in parallel that in one case are jointly joined together, while in another case the two hollow bodies are independent elements fixed to a common frame, so that in both cases the two pistons move simultaneously by means of a head that links external ends of said pistons. In this situation, a technical problem to be solved is that the products contained within the hollow bodies of the double-body syringes are mixed before being applied abroad, which in some cases can cause problems and the application of the products. Other problems presented by conventional syringes are the following:

- There are no systems to dispense two components in single doses.

- Difficult dispensing of the product (they are hard plastics with difficulty to press).

- It is difficult to modulate the dispensing of the product accurately.

- Little precision in microsurgery.

- A large part of the product remaining in the bottom of the container (hollow body) is wasted.

- Coagulation / hardening / irreversible chemical reaction of the product inside the mixing cannula or joining nozzle after a period of initial use. For this reason, in some commercialized devices it is necessary to provide several mixing cannulas or joining nozzles with each unit sold.

DESCRIPTION OF THE INVENTION

In order to achieve the objectives and avoid the drawbacks mentioned in the previous sections, the invention proposes a double-body syringe comprising two independent modules incorporating hollow bodies in whose inside adjust some mobile plungers to propel products contained within said hollow bodies to the outside; where the products go outside through the first ends of the hollow bodies while a few seconds of the hollow bodies show a part of the pistons outside.

The independent modules are linked together and arranged in parallel directions.

At the first ends of the hollow bodies connect nozzles from which some ends of cannulae are torn off, which converge at their opposite ends whereby the products contained within the hollow bodies exit outside.

In a first embodiment, the independent modules are both detachably coupled to each other by means of tongue and groove pairs; where said tongue-and-groove guides are perpendicular to the longitudinal direction of the two independent modules and where the tongue and groove guides are located in a solidary thickening of the hollow bodies. The thickets that make up the tongue and groove guides are integral with the first ends and other second ends of the hollow bodies. These tongue and groove guides comprise a dovetail-shaped structure.

The tongue and groove guides include male elements and female elements that have projections and recesses that complement each other; where the projections are embedded in the recesses when the two independent syringe modules find their correct position by joining each other through their tongue and groove guides. Highlights and recesses have a spherical cap shaped configuration.

In a second embodiment, the independent modules are joined together by at least one weakened soft material cross member that joins the two hollow bodies in solidarity. In both embodiments of the invention, in correspondence with the second ends of the hollow bodies, two opposing extensions are located as fins on which a user's index and heart fingers settle during the use of the syringe.

Considering the second embodiment of the invention, the hollow bodies are joined by a first weakened crossbar and a second weakened crossbar; where the first weakened crossbar is located at the first ends of the hollow bodies, while the second weakened crossbar is an element that joins the two opposing fins. The outer ends of the plungers comprise widenings where the thumb of a user's hand rests during the use of the syringe.

An outer end of one of the pistons comprises a radial extension facing the outer end of the other even piston.

In another embodiment to that described in the two preceding paragraphs, the outer ends of the plungers are linked by a detachable head that supports the two plungers. In a particular option, the removable head has recesses in which the two integral enlargements are adjusted to the outer ends of said plungers.

The two cannulas of the two hollow bodies form a "Y" shaped structure comprising two first sections, which connect with the nozzles of both hollow bodies and two second sections having their adjacent, but separated, outlet holes; where the first sections converge in the second sections.

Each of the independent modules is a syringe with low dead space so that once the product is injected, a very small product remains. The double body syringe of the invention has the following advantages:

- It does not require a frame to join both independent modules, since these incorporate the union system itself.

- It does not require two union nozzles or accessory cannulas in case it produces a coagulation inside the mixing cannula or union nozzle, since the two products or components housed in the hollow bodies join outside.

- They are applicable, for example, to eye surgery with pre-filled syringes, for example from 0.2 ml; without ruling out other types of surgery (medicine and veterinary medicine) and not only in these areas, since its use can be extended to modeling, DIY etc., depending on the substance contained in the pre-filled syringes. The volume of product in the pre-filled syringes can be reduced below 0.2 ml; It may contain a much smaller product volume from 0.05 ml.

- The adequate dosage ensures a single use, according to the technical file, avoiding manipulation (partition, division or separation of the same product for several patients), with the risks that this entails in terms of the loss of its sterility, risk of infection, reduction in the properties of the product over time etc.

- The syringe of the invention defrosts faster because its hollow body can be smaller in diameter to contain smaller volumes of product; although without ruling out other current volumes of hollow syringe bodies, both of tissue adhesives and epoxy resins, etc .; if it is verified that this product exceeds those already present in the market.

- Wide applicability of the product such as conjunctiva adhesion in: conjunctivacalasia surgery, pterygium, pinguecula, conjunctival tumors, conjunctiva nevus, repair of conjunctiva lacerations, filtration blister closure, perilimbic or fornix peritomy (e.g. cryocoagulation); glaucoma, sclera-fixed lenses without suture, strabismus, cerclage, sclerotomies of vitrectomies, oculoplastic, other non-ophthalmologic surgery such as tympanoplasty, etc. It can also be applied to modeling and DIY as mentioned above.

- The precision of application is high with syringes and cannulas of smaller caliber since it is necessary to apply less force.

- Blood products or other contents are not wasted, as syringes with low dead space are used.

- Simplicity of use, precision and comfort. Next, in order to facilitate a better understanding of this descriptive report and forming an integral part thereof, a series of figures are attached in which the object of the invention has been represented by way of illustration and not limitation.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1.- Shows a plan view of the double-body syringe, object of the invention, according to a first embodiment. It comprises two independent syringe modules with their own means to engage each other detachably.

Figure 2.- Shows a plan view of the syringe shown in Figure 1.

Figure 3.- Shows a perspective view of the two independent modules that make up the syringe of the first embodiment.

Figure 4.- Shows a perspective view of the syringe of the invention according to a second embodiment where the independent syringe modules are joined in solidarity with each other by two weakened areas.

Figure 5.- Shows a plan view of what is represented in the previous figure.

DESCRIPTION OF AN EXAMPLE OF EMBODIMENT OF THE INVENTION

In figures 1 to 3 a double-body syringe according to a first embodiment is shown and in figures 4 and 5 a syringe according to a second embodiment is shown.

The double body syringe of the first embodiment comprises two independent modules (1a), both detachably coupled to each other by pairs of tongue and groove guides (2) in the form of a dovetail, where said tongue and groove guides (2) are perpendicular to the longitudinal direction of the two independent modules (1 a).

The tongue and groove guides (2) comprise male elements and female elements that have projections (2a) and recesses (2b) that complement each other, so that the projections (2a) are embedded in the recesses (2b) when the two syringe modules find their correct position by joining each other through their tongue and groove guides (2). This avoids relative displacements between the two independent modules (1 a) during the use of the syringe. When it is desired to separate the two independent modules (1a), it will be necessary to overcome a resistance caused by the fitting of the projections (2a) inside the recesses (2b).

In one embodiment, the projections (2a) and the recesses (2b) have a spherical cap-shaped configuration, without ruling out other configurations.

The independent modules (1 a) comprise hollow bodies (3a), within which pistons (4a) are coupled by means of which some outer ones are ejected products contained within the hollow bodies (3a) when said pistons (4a) move inside said hollow bodies (3a).

At the first ends of the hollow bodies (3a), closing nozzles (5) are attached from which cannulae (6) start, through which the products of both independent modules (1a) go outside separately when guided pistons (4a) are moved inside the two hollow bodies (3a).

The tongue and groove guides (2) are integral with the first ends and other second ends of the hollow bodies (3a), so that in correspondence with the second ends there are opposite extensions (7) as fins to be able to manipulate better and more precisely the syringe of the invention, so that during use, the index and middle fingers of a user's hand settle against said opposing extensions (7) and the thumb pushes the two pistons (4a) by their outer ends.

The outer ends of the pistons (4a) comprise widenings (8) to facilitate their thrust with the thumb of the hand. In a first embodiment, an outer end of one of the pistons (4a) comprises a radial extension (9) facing the widening (8) of the outer end of the other piston (4a) evenly, so that when pushing the plunger (4a) ) that has the radial extension (9), drag with it to the other piston (4a) evenly to simultaneously push the two products contained inside the hollow bodies (3a), leaving said products separately through the joined ends of the cannulas (6).

The tongue and groove guides (2) are perpendicular to the longitudinal direction of the two independent modules (1a), while said tongue and groove guides (2) are located in a thickening (10) integral with the hollow bodies (3a).

A second embodiment of the invention shown in Figures 4 and 5, the syringe also comprises two independent modules (1 b), two hollow bodies (3b) and two plungers (4b) embedded inside hollow bodies (3b). Also included are the closing nozzles (5) from which the cannulas (6) start, as well as the opposing extensions (7). The pistons (4b) of this second embodiment also include the widenings (8) and a removable head (8 ') that is removable and joins the two widenings (8) of the plungers (4b) to make them integral and simultaneously drive outside the two products contained within the hollow bodies (3b) of the syringe. For this, the removable head (8 ') incorporates a recess (12) where said widenings (8) are adjusted.

In this second embodiment, the two independent modules (1 b) instead of being linked by the detachable coupling formed by the tongue and groove guides (2), are joined together by a first weakened crossbar (11) and a second weakened crossbar (11 ' ) of soft material, which jointly join the two hollow bodies (3b); where the first weakened crossbar (11) is located at the first ends of the hollow bodies (3b), while the second weakened crossbar (11 ') is an element that joins the two opposing fins (7).

Said weakened crossbars (11), (11 ') can be easily broken by tensile stress or shear without requiring any cutting tools, but with sufficient strength to hold the two independent syringe modules together to be able to use both together assembled

In both embodiments of the invention, the two cannulas (6) of the two hollow bodies (4a), (4b) form a Ύ "shaped structure comprising two first sections (6a) that connect with the nozzles (5) of both hollow bodies (4a), (4b), and two second sections (6b) that have their adjacent exit holes, but separated, so that the first sections (6a) converge on the second sections (6b).

These embodiments are illustrative but not limiting, so that they do not exclude the possibility of other similar embodiments by varying the joint system between the pairs of hollow bodies (3a), (3b), but with the same concept and for the same purpose (union by means of square brackets, snap buttons ("snap fastener"), in "T", connection by type "click", other types of tongue and groove etc.

Claims

1.- DOUBLE BODY SYRINGE, which comprises two independent modules (1 a), (1 b) that incorporate hollow bodies (3a), (3b) inside which adjust mobile pistons (4a), (4b) to drive abroad some products contained within said hollow bodies (3a), (3b); where the products go outside through first ends of the hollow bodies while for a few second ends of the hollow bodies a part of the pistons (4a), (4b) appear outside; characterized by:

- the independent modules are linked together and arranged in parallel directions;

- at the first ends of the hollow bodies (3a), (3b) connect nozzles (5) from which ends of some cannulae (6), which converge at their opposite ends by those that go outside in a way separate the products contained within the hollow bodies (3a), (3b);

- in correspondence with the second ends of the hollow bodies (3a), (3b) two opposing extensions (7) are located as fins on which the index and middle fingers of a user settle.

2. DOUBLE BODY SYRINGE, according to claim 1 characterized in that the independent modules (1a) are both detachably coupled to each other by means of tongue and groove pairs (2); where said tongue and groove guides (2) are perpendicular to the longitudinal direction of the two independent modules (1a) and where the tongue and groove guides (2) are located in thickeners (10) integral with the hollow bodies (3a).

3. - DOUBLE BODY SYRINGE, according to claim 2 characterized in that the thickets (10) that integrate the tongue and groove guides (2), are integral with first ends and other second ends of the hollow bodies (3a).

4. - DOUBLE BODY SYRINGE, according to claim 1, characterized in that the tongue and groove guides (2) comprise a dovetail-shaped structure.

5. - DOUBLE BODY SYRINGE, according to claim 1, characterized in that the tongue and groove guides (2) comprise male elements and elements female that have projections (2a) and recesses (2b) that complement each other, where the projections (2a) are embedded in the recesses (2b) when the two independent syringe modules (1 a) find their correct position at join each other through their tongue and groove guides (2).

6. DOUBLE BODY SYRINGE, according to claim 5, characterized in that the projections (2a) and the recesses (2b) have a spherical cap-shaped configuration.

7. DOUBLE BODY SYRINGE, according to claim 1, characterized in that the independent modules (1 b) are joined together by at least one weakened soft material cross member that joins the two hollow bodies (3b).

8. DOUBLE BODY SYRINGE, according to claim 7, characterized in that the hollow bodies (3b) are joined by a first weakened crossbar (1 1) and a second weakened crossbar (1 1 '); where the first weakened crossbar (1 1) is located at the first ends of the hollow bodies (3b), while the second weakened crossbar is an element that joins the two opposing fins (7).

9. DOUBLE BODY SYRINGE, according to claim 1, characterized in that the outer ends of the pistons (4a), (4b) comprise widenings (8) where the thumb of a user's hand rests.

10. - DOUBLE BODY SYRINGE, according to claim 1, characterized in that an outer end of one of the pistons (4a) comprises a radial extension (9) facing the outer end of the other piston (4a) even.

11. - DOUBLE BODY SYRINGE, according to claim 9, characterized in that the two widenings (8) of the pistons (4b) are joined by a removable (8 ') and removable head that incorporates a recess (12) where they fit said widenings (8) of the pistons 4b.

12. - DOUBLE BODY SYRINGE, according to claim 1, characterized in that the two cannulas (6) of the two hollow bodies (3a), (3b) form a "Y" shaped structure comprising two first sections (6a ) that connect to the nozzles (5) of both hollow bodies (3a), (3b), and two second sections (6b) that have their exit holes adjacent, but separated; where the first sections (6a) converge in the second sections (6b).