DE29600206U1 - Infuser - Google Patents

Description

Infusors, infusiomats or infusion pumps have the task of precisely controlling the infusion of medication or fluids.

In order to achieve the desired precision, the current state of the art predominantly uses calibrated drug-filled syringes that are infused via an external motor-driven and controlled spindle with a deflection element via an infusion set via at least one venous or arterial access.

Roller pumps or pumps operating in peristaltic mode, for example, are unsuitable for precise drug application.

The conventional syringe infusors mentioned above have the disadvantage that a standard 100 ml syringe has to be changed after it has been emptied, which interrupts the infusion for that period.

. Of course, this is negligible in the majority of infusion cases, just as it does not seem realistic to the author to guarantee a required continuous flow with an hourly deviation of plus/minus 0.2 ml.

It is important to be aware that the infusion catheter can become obstructed, kinked, the infusion set can be compressed or kinked, that there can be a disconnection, a power failure or electronic failure, even with double protection, whereby the human factor must be taken into account alongside other malfunctions, as well as rheological aspects, the choice of tubing material, etc., which have not even been mentioned yet.

Nevertheless, infusion pumps are considered a major therapeutic advance in infusion therapy compared to the traditional "drip" and it is the task of medical technology to take account of constant improvement through innovation.

For this reason, the essence of the invention presented was seen in the fact that, with sufficient storage compartments, the usual syringe change is not necessary while maintaining the same precision of the infusion.

This means that the modified syringe works in pendulum mode while ensuring sterility.

Assuming that the control of the drive unit is guaranteed with the required safety parameters or even takes place via a separate control unit for several infusors, the infusor itself is limited to a syringe that is to be discarded after use and to an electric motor.

The modified syringe itself, in the variant described, is equipped with a rotationally stable piston, which works in forward and reverse motion via a motor-driven internal spindle.

This means that one piston surface sucks in infusion fluid, the other infuses it. In the version presented, this control is carried out by valves working in opposite directions and a modified infusion set.

The invention will now be explained in more detail with reference to claims 1-13 and figures 1 and 2.

This shows

Figure 1 shows the complete kit in a schematic sectional and schematic representation,

Figure 2 shows a schematic representation of the syringe body in section A.

Figure 1 shows a schematic sectional and schematic representation of the complete kit with calibrated {8) syringe (3) with piston (7) which is driven alternately, i.e. in forward and reverse, via spindle (19) thanks to its rotational stability (17) by means of drive unit (2). The motor control and that of other parameters is carried out via control (1).

The respective end valves (12,13) serve to ensure that the respective suction and infusion processes run safely.

These can be integrated in the syringe (3) itself or in the modified infusion set (4) which is

r . '·■■■■

for use with syringes on both sides, preferably has Y-tube sections (23,24), which in turn are preferably connected by Luer-Lock adapters (14,14^).

Access (26) to the patient (32) is achieved in the conventional manner via a catheter or the like.

The syringe (3) itself is closed on both sides by the sealing elements (21), which each support the spindle (19) in a closed manner.

The lower spindle part is designed as a multi-surface (29) and is coupled to the drive unit (2) , (22). In the embodiment, the control unit (1) is programmable by programming unit (6).

Storage container (25) with infusion liquid (5) flows into infusion set (4) and can be disconnected for changing (27).

In summary, the two syringe compartments (15,16) are alternately filled (25) and emptied (26).

Section E symbolizes the threaded spindle (19,28), section B the spindle driver (29), sections C and D the passage (30,31) through the sealing elements (21).

Figure 2 shows a schematic representation of the section through the syringe body (3) in area A.

The variant shows the syringe cylinder (3) for rotational stability of the piston (7) with its bottom surface (11) oval (17). Spindle (19) with spindle thread (20) rotates sealed in the piston (7).
The counter piston side (10) can be seen in Figure 1.

Syringe cylinder (3) with threaded spindle (19), piston (7), valves (12,13), drive unit (2) and other elements can alternatively also be used as a balancing device, e.g. in hemo- or peritoneal dialysis or in other application areas.

Claims (14)

EXPECTATIONS 1. . Infuser, characterized, that an alternately controlled (1), sterile sealed and driven (2) syringe variant (3) is suitable for use with a modified infusion set (4) to carry out a continuous infusion of drug solutions (5) from a storage compartment (27) or with its most important components (3,7,19,12,13,2,...) suitable for balancing, e.g. in dialysis machines or in other areas of application. 2. Infuser according to claim 1,
characterized, that the control (1) is suitable for carrying out the programmed flow, infusion duration and other parameters {6). 3. Infuser according to at least one of claims 1, 2, characterized in that the drive unit (2) is suitable to work precisely in forward and reverse motion. 4. Infuser according to at least one of claims 1-3, characterized in that the syringe variant (3) preferably has a piston (7) in the precisely calibrated. (8) cylinder (9), which (7) is suitable for carrying out an alternating movement so that one piston side (10) makes the infusion in the cylinder (9) possible, while the other piston side (11) simultaneously ensures the cylinder filling for the counter-current infusion process, whereby preferably suitable terminal • 4 · Adapters (14,14^) and &zgr;. B. Lip seals or similar are used for the inlet and outlet or are preferably installed downstream of the adapters (14,14"). 5. Infuser according to at least one of claims 1-4, characterized in that the syringe variant (3) maintains sterility in its function by the piston (7) being able to move closed compartments (15, 16). 6. Infuser according to at least one of claims 1-5, characterized in that the syringe piston (7) can be operated with rotational stability (17) preferably by means of a mounted (18) and sealed threaded spindle (19), which corresponds to the internal piston thread (20). 7. Infuser according to at least one of claims 1-6, characterized in that the rotational stability of the piston (7) is preferably ensured by an oval tube segment (17) with a correspondingly contoured piston (7), which is sealed at each end with the spindle (19) ■ (21). ^ , 8. Infuser according to at least one of claims 1-7, characterized in that rotational stability in a circular piston is preferably ensured by a guide element. 9. Infuser according to at least one of claims 1-8, characterized in that the syringe thread spindle (19) is suitable to be connected (22) to the drive unit (2). 10. Infuser according to at least one of claims 1-9, characterized in that the preferably used infusion set (4) is securely connected to the terminal syringe inlet adapters (14) preferably via a Y-hose element (23), while the respective outlet adapters (14 ^s ") are preferably also connected via a Y-hose element (24) with the same security. 11. Infuser according to at least one of claims 1-10, characterized in that the inlet elements (13,14,23) of the infusion set (4) are connected to a suitably dimensioned and exchangeable storage compartment (25), while the outlet elements (12,14 \ 24) establish the connection to the infusion catheter (26) or the like. 12. Infuser according to at least one of claims 1-11, characterized in that the syringe variant (3) is available in optimized sizes according to the indication. 13. Infuser according to at least one of claims 1-12, characterized in that the control (1) is suitable for being addressed with a corresponding storage medium such as a patient-programmed smart card, whereby a PIN or similar is able to prevent confusion and that ultimately it is possible to operate several infusors, ultimately for several patients, via at least one central control unit. 14. Balancing device, characterized, that the cylinder (3) with the piston (7) which alternately sucks in and expels via the threaded spindle (19) and the corresponding inlet (13) and outlet valves (12) is suitable for use for exact balancing, e.g. in dialysis machines or other areas of application.