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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0737806 (2013-01-09) |
등록번호 | US-8774907 (2014-07-08) |
발명자 / 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 | 피인용 횟수 : 32 인용 특허 : 835 |
Methods of locating a tip of a central venous catheter (“CVC”) relative to the superior vena cava, sino-atrial node, right atrium, and/or right ventricle using electrocardiogram data. The CVC includes at least one electrode. In particular embodiments, the CVC includes two or three pairs of electrode
Methods of locating a tip of a central venous catheter (“CVC”) relative to the superior vena cava, sino-atrial node, right atrium, and/or right ventricle using electrocardiogram data. The CVC includes at least one electrode. In particular embodiments, the CVC includes two or three pairs of electrodes. Further, depending upon the embodiment implemented, one or more electrodes may be attached to the patient's skin. The voltage across the electrodes is used to generate a P wave. A reference deflection value is determined for the P wave detected when the tip is within the proximal superior vena cava. Then, the tip is advanced and a new deflection value determined. A ratio of the new and reference deflection values is used to determine a tip location. The ratio may be used to instruct a user to advance or withdraw the tip.
1. A method of determining a location of a tip of a central venous catheter having a lumen filled with an electrolytic material, a portion disposed inside the superior vena cava, a second electrode attached to the skin of a subject, and a first electrode in communication with the electrolytic materi
1. A method of determining a location of a tip of a central venous catheter having a lumen filled with an electrolytic material, a portion disposed inside the superior vena cava, a second electrode attached to the skin of a subject, and a first electrode in communication with the electrolytic material, the tip having an opening in communication with the lumen that exposes the electrolytic material inside the lumen to the electrical environment outside the tip, the method comprising: obtaining a reference electrical signal comprising the voltage difference between the first electrode and the second electrode;generating a reference P wave from the reference electrical signal;determining a reference deflection value of the reference P wave;after the tip of the central venous catheter has been moved to a new position, obtaining a new electrical signal comprising the voltage difference between the first electrode and the second electrode;generating a new P wave from the new electrical signal;determining a new deflection value of the new P wave;calculating a ratio of the new deflection value to the reference deflection value;comparing the ratio to a threshold value; andindicating the tip should be withdrawn based on the comparison of the ratio to the threshold value.
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