Patent Application
20180250499
The present invention is related to the industry which manufactures hospital instruments. More specifically it is related to the industry which manufactures instruments for venous p and catheterization. Even more specifically, it is related to a catheter and needle assembly, which includes a protection unit for the needle which safely protects the far sharp end of a puncturing needle, after said needle has been used.
As Rivera and collaborators [1] mention, IV intravenous therapy is in answer to the need to transfer blood from one human being to another and it dates back to approximately 1492. In medicine, the assembly of a catheter and puncturing needle are used to effectively place a catheter into the circulatory system of a patient. There are essentially two kinds of assemblies for placing venous catheters within the circulatory system of a patient. The first is a catheter placed within a puncturing needle which is used to puncture the skin and place a catheter into the circulatory system of the patient, the needle is removed, leaving the catheter in the circulatory system of the patient. The second kind of unit for placing a catheter consists of a disposable needle which passes through the catheter in order to puncture a vein and allow for placing the catheter. Once placing of the assembly in the vein is checked using retrospection of blood in the needle, the needle is removed, leaving the intravenous catheter in place for its use in connecting an intravenous bag or bottle or a stopper for later use.
Between the time when the needle is removed and connecting the intravenous catheter to the flow supply line, blood from the patient's vein may drip from the catheter. Also blood usually remains in the used needle and this may also overflow or drip on the clinic personnel who are carrying out the procedure. Another risk factor associated with the use of these kinds of devices is the accidental puncturing of clinic personnel with the used needle and contamination with patient's blood or bodily fluids.
Throughout the world there is epidemiological evidence that the biggest worry related to the use of sharp instruments and their treatment as infectious waste in hospitals is the transmission of the AIDS virus and more frequently, Hepatitis B and C viruses. This is due to wounds caused by needles contaminated with human blood. There is then a growing need for producers of catheters to prevent accidental wounds with needles to medical personnel and other employees who handle hospital waste, wash the clothing or other residues which contain used needles. As a result, new products have been designed to incorporate special covers for the needle or mechanisms for retracting the needle inside a protective chamber. Such devices are described, for example in U.S. Pat. Nos. 4,747,831, 4,828,548, 5,129,884, 5,501,675, 5,817,058, 5,989,220, 7,771,394 and 7,740,615. Many of the devices described in these patents have various parts which substantially raise manufacturing costs, besides interfering in the ability of the user to sense when the needle is correctly inserted in the patient's vein. Other devices require two-handed handling or, due to the design of the retraction of the needle by activating a safe spring system, are prone to premature retraction of the needle while being transported, stores and handled.
Still another problem associated with peripheral type intravenous catheters is the dripping caused by overflow of blood coming from the opening of the catheter where the IV line is to be attached, when it is not attached. This overflow of dripping blood may come into contact with the clinic personnel and especially with the technician who carries out the catheterization process, putting that person in risk of contamination and the transmission of diseases, health problems and increases in the costs of healthcare systems.
As may be inferred from the text, there are certain qualities which an intravenous catheterization device should have. Among these are: a) to prevent exposure of medical personnel to contaminated fluids of blood during the process of placing the catheter in a patient; and b) to have an easily manageable safety system.
In a catheterization device with a quick and painless puncturing system, a means for protecting the needle or cannula while at the same time protecting the user and avoiding accidental injury with the tip is presented. However, in a catheter without a quick and painless puncturing system, there has been no system for protecting the needle as indicated in the present application.
As an example of the kind of protection mentioned in the preceding paragraph, we have Mexican application MX/a/2011/013382 of the same applicant as the present application. However, this device does not have a mechanism for preventing that upon removing the cannula or connecting the IV line there is a probability of contact by the handler with fluids or blood.
The main objective of the invention is to achieve a device for intravenous catheterization which prevents exposure to contaminated bodily fluids by medical personnel during the placing and withdrawal of the catheter in the patient.
Still another objective is having a device which integrates a safety system which encapsulates the cannula with the sharp point, which is compact and easy to use.
Other objectives and advantages may become apparent through reading this application and the drawings which are included for strictly illustrative, non-limiting, ends and which form an integral part of the present description.
The present invention refers to a system for placing an intravenous catheter, especially a closed intravenous catheter placement system, which prevents exposure by medical personnel to a patient's bodily fluids during the placing of the catheter; and with a cannula for a retractable needle in a manual bellows mechanism to ensure that the needle cannot be reused, cause accidental puncture wounds and to ensure its safe disposal.
The present invention refers to a double system which allows, in one of its components, a closed peripheral intravenous catheter system, to avoid contact with a patient's bodily fluid during the catheterization process, besides being a closed system which reduces the possibility of the growth of microorganisms in the puncture area since the connections are multi-piercing connections and rapid connections which keep the inside ducts of the device through which fluids and medicine pass into the circulatory system, isolated from the external environ. In a second component, a manual safety mechanism which allows for the retrieval of the contaminated cannula inside a protective chamber after the piercing process, in order to avoid later contact of the users or other persons, thus preventing puncturing accidents and the transmission of diseases.
Likewise, the characteristics of the retraction system assure that there is no contact with the cannula after the catheter has been placed in the patient, and which allows it to be placed at a safe distance within the protective chamber of the safety system.
The CPIVCSS assembly of the present invention consists of a hollow catheter hub which on one end has a soft flexible stopper which serves as a seal and only allows the passage and withdrawal of the introductory needle and which on the other coaxial end the catheter which during catheterization is mechanically anchored within the patient's vein is found.
The hollow catheter hub on one side has an opening from which extends from its periphery another hollow hub at an angle greater than zero degrees and on whose free end a translucent flow tube is connected, extending the length of at least 3 cm. On the free end of the tube a system of multi-piercing connectors and quick connectors is connected which avoid the outflow of fluids from inside the device and only allow the inflow of fluids upon connecting the IV lines or injecting medications.
The hollow catheter hub, on the part opposite the placement of the catheter, has an affixing body which has an opening for the passage of the introducing needle. This first affixing body, in the first stage of CPIVCSS operation is to be used by the technician responsible for placing the catheter in the patient to bold the device and carry out the catheterization process. During the second stage of the CPIVCSS operation it is used to block the pointed end of the introducing needle and prevent accidental wounds.
Attached to the other end of the affixing body is a flexible bellows tube in which the introducing needle is housed when the CPIVCSS safely system is activated. The billows is initially located in a state of compression, while the other end of the billows is attached to the body of the housing which acts as a base for mounting the introducing needle. With this configuration the introducing needle passes through the flexible billows tube, from the affixing body, goes through the flexible top of the catheter hub and is placed inside the catheter. All of the components in the aforementioned configuration make up the CPIVCSS in the piercing modality.
Besides that, on one of the ends of the body of the housing is a translucent hollow cylinder or filter and flashback chamber, which allows the technician responsible for the catheterization procedure to see the flashback of the blood when the far away tip of the needle has been placed in the patient's vein. Once catheterization has taken place and the introducing needle along with the catheter are in the patient's vein, the technician responsible for carrying out the procedure, without moving the affixing body, pulls the body of the housing away from the catheterization area. This process pulls the introducing needle from the patient's vein, leaving the catheter in place; it also extends the billows to cover the part of the cannula which was in contact with tissues of the body, including the blood and encapsulating the introducing needle so that possible accidental puncture wounds or spillage of contaminated fluids from the patient does not occur.
We use the figures of the preferred modality of the present invention for the detailed description.
An exploded view of the thirteen elements which make up the closed peripheral intravenous catheter with safety system CPIVCSS is shown in
The isometric view of the closed peripheral intravenous catheter and the piercing and safety system in connecting mode is shown in
Once attached the safety and piercing system with the closed peripheral intravenous catheter forms the closed peripheral intravenous catheter with safety system CPIVCSS. An isometric view is shown in
In the puncturing stage of the CPIVCSS as shown in the cross section in
Attached to the affixing body (10) is the compressed flexible billows tube (9) which covers part of the piercing cannula (2), while on the other end of the flexible billows tube (9) the affixing body (11) is attached. The piercing cannula (2) passes through the affixing body (11) and penetrates the hub seal (12) and crosses the catheter hub (3) and remains housed in the inside of the catheter tube (1) which is attached to the catheter hub (3) at one of its ends. On the bottom of the catheter hub (3) are the affixing wings (4) which serve to affix the closed peripheral intravenous catheter to the piercing area on the patient's body.
During the catheterization process the medical personnel in charge of the procedure holds the CPIVCSS of the affixing body (11) and introduces the piercing cannula (2) along with the catheter tube (1) into the circulatory system of the patient. By way of blood retrospection in the flashback chamber and filter (8) the medical personnel assures the correct placement of the closed intravenous catheter into the circulatory system of the patient and proceeds to withdraw the piercing cannula (2), thus activating the CPIVCSS safety system.
The CPIVCSS in its safety stage is shown in the isometric view in
In
Once the flexible billows tube (9) has expanded and the piercing cannula (2) is encapsulated and the sharp ends of the affixing body (11) disabled, the technician in charge may proceed to disconnect the activated safety system of the closed peripheral intravenous catheter as shown in
Once the closed peripheral intravenous catheter is installed in the patient's circulatory system, disposing of the puncturing cannula (2) which is now contaminated with blood and other bodily fluids from the patient is begun. The piercing cannula remains encapsulated within the flexible billows tube (9) and its sharp ends are blocked by the affixing body (11) in order to avoid any possible accidental puncture wounds to medical personnel and contamination with the blood remaining in the used piercing cannula (2).
The invention has been sufficiently described so that a person with knowledge of the field can reproduce and obtain the results we mention for the present invention. However, anyone with knowledge of the field of the present invention is capable of making modifications not described in the present application, and if, for the application of these modifications in the determined structure or manufacturing process it is necessary to use the material claimed in the following claims, said structure should be considered within the scope of the invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| MX/A2013/001219 | Jan 2013 | MX | national |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 14762757 | Jul 2015 | US |
| Child | 15730962 | US |
