DE202007018614U1 - Adapter for quick connection between Pacemaker and catheter electrode - Google Patents

Abstract

Adapter for the connection between a pacemaker (PM) and a catheter electrode, comprising:
a. a block of insulating material (1) with metal insert for the merger
b. an automatically returned to initial position push button (2) for quick connection to an electrode of the electro catheter and
c. an insertion groove (4, 5) for a connection electrode (3)

Description

Field of application of the invention

The representational This invention relates to the field of pacemaker (PM) systems for electrostimulation of the heart in patients without natural stimulation or with inadequate or absent heart rhythm. As known Such systems include one in a particular one in the thorax pocket formed by Pacemaker inserting the electric Stimulation pulses generated by means of a transvenous catheter electrode transmitted to the heart become. The objective Invention falls into this area by delivering an adapter that's fast Connection between PM and catheter electrode allowed and thus a comfortable implementation of intraoperative measurements.

State of the art

at the first implantation of the PM, the catheter electrode via a specially practiced opening in the selected Vein - usually into the vena cephalica - introduced and then successively through the subclavian vein, the vena anonyma and the vena cava advanced until its distal end in the right Heart chamber, at the endocardium, arrived, in which it expediently is attached.

Catheter electrodes have a coaxial construction and consist of an outer insulating sheath and an internal spiral consisting of several wires a special metal alloy with high electrical conductivity, the spiral are wound, with closely spaced turns, the Windings limit an internal lumen.

Of the tubular coaxial Construction is essential because, since the coils due to their nature and construction are very flexible, inserting the catheter electrode would not be possible along the aforementioned veins; the intervention will therefore carried out, by temporarily giving the catheter electrode a higher rigidity gives.

These higher Stiffness is achieved by placing in the cavity of the Wendel a thin one Metal wire, called mandrin, introduces, which has sufficient rigidity has and the same length has, like the catheter electrode itself, and the end of the procedure is pulled out when the tip of the catheter electrode in the Heart chamber is reached, to which it is attached.

To Termination of this procedure, the catheter electrode remains in situ to fulfill their function. However, as the experts in the field know, it is after a certain amount of time required to replace the Pacemaker, and on this occasion will also be a check of the state the catheter electrode by intraoperative measurements performed to to consider, whether her condition is satisfactory or in any case such is that a replacement of the same is not necessary.

The The above-mentioned intraoperative measurements consist in the measurement the thresholds of cardiac stimulation, the flowing current (Ic), the threshold current (Is) and the safety factor Fs, where Fs = Ic / Is, and beyond The electrical check-up of the catheter electrode is also performed. These measurements, together with the direct connection itself of the PM with an implanted one Catheter electrode, have various logistical difficulties the implementation on which the activities to be undertaken complicate.

To These problems also come from the merger of PM and Add catheter electrode.

Currently have pacemakers and catheter-electrode connectors with different dimensions, which makes it necessary while the implantation of the pacemaker connects the catheter electrode to the connector to adapt to the PM and the hermetic tightness of the part To restore silicone rubber, which serves to prevent blood and physiological fluid penetrate into the interior of the connection and to the fixing screw with the consequent danger of power losses.

Obviously extend these adjustment and restoration activities are the duration of the operative Intervention in unnecessary and harmful way.

• – die Verbindung des Adapters mit der Elektrode erfolgt mittels Festziehen einer auf ersterem angeordneten Schraube, die auf die Wendel der Katheter-Elektrode wirkt;
• – die Verbindung des Steckerstifts des Adapters mit dem Pacemaker, die durch Festziehen der Schraube erfolgt, die Teil des Anschlusses selbst ist;
• – die Verbindung mittels Zusammenspannens des Steckerstiftes mit der Wendel der Adapterverlängerung, Zusammenspannen, das notwendig ist, da die Legierung, aus der die Wendel der Katheter-Elektrode besteht, Schweißungen nicht erlaubt.

There are currently catheter-electrode adapters in the market, but these are multiple-attachment type adapters and have various aspects of lesser reliability, namely:

• - The connection of the adapter to the electrode by means of tightening a screw arranged on the former, which acts on the filament of the catheter electrode;
• The connection of the connector pin of the adapter with the Pacemaker, which is done by tightening the screw which is part of the connector itself;
• - The connection by means of clamping the connector pin with the coil of the adapter extension, clamping, which is necessary because the alloy that makes up the filament of the catheter electrode, he not welds laubt.

Object of the invention

outgoing Of the above problems, the present invention continues It is therefore the task of a system for the fast connection between Pacemaker and catheter electrode that makes it possible perform the intraoperative measurements conveniently and simplify their implementation.

These The object is achieved by an adapter according to claim 1 and a corresponding Method of use according to claim 8 achieved. The independent claims show further advantageous embodiments.

Detailed description of the invention

The representational The invention will be described in detail with reference to the figures. These demonstrate:

1 : Adapter for a unipolar catheter electrode with inserted connection electrode 3 ;

2 : Adapter for a bipolar catheter electrode with inserted connection electrode 3 ;

3 : Front view of the adapter according to the invention.

• – Block aus isolierendem Material (1) mit Einsatz aus Metall für den Zusammenschluss
• – automatisch in Ausgangsstellung zurückkehrender Druckknopf (2) für den schnellen Anschluss an eine Elektrode des Elektrokatheters
• – Einführungsnut (4) für eine Anschlusselektrode (3)

The adapter which forms the subject of the present invention comprises the following parts:

• - block of insulating material ( 1 ) with metal insert for the merger
• - automatically return to home position push button ( 2 ) for quick connection to an electrode of the electrocatheter
• - insertion groove ( 4 ) for a connection electrode ( 3 )

The adapter can be realized for both a unipolar and a bipolar catheter electrode. In the latter case, the block 1 with two sections isolated from each other 1a and 1b be designed so as to ensure a bipolar connection in both directions. The automatically return to the initial position push button ( 2 ) acts on both isolated sections ( 1a . 1b ) of the block ( 1 ). In both embodiments, the push button is 2 equipped with a return spring M.

Of the Adapter can be delivered sterile in a separate packaging or already plugged into the PM. The length L can be different Have dimensions that are in any case between 20-80 cm, and in any case will be a low ohmic resistance guarantee that it is so that he does not do the intraoperative measurements falsified.

The connection to the implanted catheter electrode goes quickly and is done by pushing on the small lever 2 pushes the groove 4 . 5 opens and automatically closes when released and guarantees an effective electrical connection.

by virtue of the selected one Length L If the PM is in an easily accessible position for the surgeon, the measurements reliable will perform can. If it is a PM unipolar type, the back link with an additional Connection between the plate of the PM and one under the skin of the Patients inserted platelets accomplished become. The impedance of the adapter must be a maximum of 10 Ohms to have no significant impact on the measurements.

Around To achieve this result, it is expedient that the adapter either with a conductor in multi-lane design or with a multiwire Wendel is realized.

Of the inventive adapter allows a quick fusion of catheter electrode and PM, so that the intraoperative measurements are easily performed can. The measuring system is absolutely reliable as it is using the implanted PM itself and thus its sophisticated electronic Circuits is done.

The Measurements are made using an external programming device by means of a radio frequency connection or by means of a sterile device.

Claims (7)

Adapter for connection between a pacemaker (PM) and a catheter electrode, comprising: a. a block of insulating material ( 1 ) with metal insert for the merger b. a push-button that automatically returns to the initial position ( 2 ) for quick connection to an electrode of the electrocatheter and c. an introduction groove ( 4 . 5 ) for a connection electrode ( 3 ) Adapter according to claim 1, a. characterized in that the block ( 1 ) two mutually isolated sections ( 1a . 1b ) such that they ensure bipolar connection in both directions. Adapter according to claim 2, a. characterized in that the automatically return to home position push button ( 2 ) on both isolated sections ( 1a . 1b ) of the block ( 1 ) acts. Adapter according to one of the preceding claims, a. characterized in that the length (L) of the terminal electrode ( 3 ) is between 20 and 80 cm. Adapter according to one of the preceding claims, a. characterized in that the automatically return to home position push button ( 2 ) is equipped with a return spring (M). Adapter according to one of the preceding claims, a. characterized in that its impedance is at a maximum value of 10 ohms. Adapter according to one of the preceding claims, a. characterized in that it is with a multi-stranded conductor or realized a multi-wire coil.