Cautery needle for separating and/or penetrating the pericardium

摘要

A pericardial needle that punctures a pericardial membrane with cautery to attain access into a pericardial space of a heart by positioning a cautery needle tip adjacent to or in contact with a parietal pericardium of the heart such that the puncturing does not damage the heart muscle. The pericardial needle punctures the parietal pericardium when the heart muscle moves towards the pericardial needle, away from the pericardial needle, is at rest and/or is in synchronization with the systolic contraction period of the cardiac cycle of the heart. The synchronization may be provided based on a surface electrocardiogram, an arterial pressure, or a sensing pressure at the tip of the pericardial needle when the pericardial needle is adjacent into the parietal pericardium of the heart.

主权项

1. A pericardial needle that punctures a pericardial membrane of a heart of a human patient, the pericardial needle comprising: an outer_cautery needle having a blunt cautery tip: an inner stylet having a sharp tip to puncture the pericardial membrane, the inner stylet being disposed inside the outer cautery needle; at least one of a first lumen having a wire passing through the first lumen and a second lumen having a contrast needle disposed inside the second lumen, wherein the at least one of the first lumen and the second lumen is affixed onto an inner surface of the outer cautery needle: and a controller that is configured to administer a cautery pulse to the blunt cautery tip through the outer cautery needle, wherein the controller is configured to track systole and diastole contraction phases of the heart for the administration of the cautery pulse through the outer cautery needle, and the pericardial needle is configured to advance toward the heart of the human patient to puncture, by cautery, the pericardial membrane of the heart in synchronization with a systole contraction phase of a mechanical activity of the heart of the human patient.