Connecting device for intra-atrial ECG-lead

Details Connecting device for intra-atrial ECG-lead Connecting device for intra-atrial ECG-lead

1999-09-23

2001-11-27

Schaetzle, Kennedy (Department: 3762)

Surgery

Diagnostic testing

Structure of body-contacting electrode or electrode inserted...

C600S509000, C600S523000, C439S909000, C128S897000

Reexamination Certificate

active

06324416

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention refers to a connecting device for intra-atrial ECG-lead and in particular to a connecting device with which the patient cable of an ECG display may be connected to the electric conductor of a vena cava catheter.
A connecting device disclosed in EP 0 596 344 B1 comprises a connecting cable for direct connection with the electric conductor of a vena cava catheter for contacting the atrium, and an adapter to which a connector of the patent cable may be applied and which may be connected with an ECG clamp of the patient cable that is part of a display. Using the patient cable exclusively, an extracorporeal ECG lead may be performed by plugging the three ECG clamps of the patient cable onto ECG electrodes fastened on the patient's body. When the adapter is used in addition, it is possible to perform an intra-atrial ECG lead instead of or in addition to the extracorporeal ECG lead, where an electric conductor extending in a vena cava catheter is advanced into the atrium of the patient. The extracorporeal end of the electric conductor is connected to a second input of the adapter through the connecting cable. It is possible to connect either the first or the second input of the adapter through to the output of the adapter and to transfer the respective potential through the connected ECG clamp of the patient cable to the display. The presence of the adapter is imperative to performing an intra-atrial ECG lead. Without the adapter, the connecting cable is useless, since only an extracorporeal ECG can be recorded using the patient cable.
U.S. Pat. No. 5,243,995 and DE 43 19 033 C1 describe catheter guide wires adapted to be advanced up to the heart, with their tip projecting from a vena cava catheter. Further, DE 43 18 963 C1 describes a device for performing an ECG lead, where the ECG signals are transmitted using an electrolytic liquid forming an electrically conductive liquid column.
U.S. Pat. No. 5,769,786 describes a catheter set offering the possibility of performing an ECG lead, where the ECG signals are transmitted out from the body via a guide wire. To the side of the guide wire, a clamp connected with a connecting wire is applied.
It is an object of the present invention to provide a connecting device comprising a connecting cable and an adapter, which can selectively be used with or without the adapter for an intra-atrial ECG lead.
SUMMARY OF THE INVENTION
According to the invention, the second connector of the present connecting device is a dual connector providing for two possible connections. This connector includes a socket portion matching the plug portion of the adapter, and it further includes a conductive shaft portion to which the ECG clamp may be clamped fittingly. It is an essential advantage that the second connector may selectively be connected with the adapter or with an ECG clamp of the patient cable. It is assumed that the ECG clamp of the adapter is designed substantially like the ECG clamps of the patient cable or that it at least has the same clamping width. Therefore, either the ECG clamp of the patient cable or that of the adapter may engage the shaft portion of the second connector of the connecting cable.
The patient cable thus offers different possibilities for transmitting intra-atrially lead ECG signals to the patient cable. Naturally, the main possibility is to fasten the socket portion of the connector to the plug portion of the adapter. On the other hand, it is also possible to connect the patient cable directly with the second connector of the connecting cable.
The invention further refers to a connecting device for an intra-atrial ECG lead, comprising a conventional patient cable with a plurality of ECG clamps and the present connecting cable. In this case, no adapter is present, yet it may be used optionally.


REFERENCES:
patent: 3445794 (1969-05-01), O'Keefe et al.
patent: 3892456 (1975-07-01), Westmoreland
patent: 5243995 (1993-09-01), Maier
patent: 5316494 (1994-05-01), Flanagan et al.
patent: 5350318 (1994-09-01), Nees
patent: 5509822 (1996-04-01), Negus et al.
patent: 5769786 (1998-06-01), Wiegel
patent: 4318963 (1993-06-01), None
patent: 4319033 (1993-06-01), None
patent: 0596344 (1998-10-01), None

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