Transthoracic monitoring of the impedance of the right lung in patients with cardiogenic pulmonary edema

Charach, Gideon; Rabinovich, Pavel; Grosskopf, Itamar; Weintraub, Moshe

doi:10.1097/00003246-200106000-00008

Cited by 34 publications

(47 citation statements)

References 22 publications

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“…the TTI [8,15]. These results showed much higher sensitivity compared with the 1.5% changes found when using TTI methods.…”

Section: Introductionmentioning

confidence: 88%

“…The diagnosis of pleural effusion was based on clinical signs of arterial hypoxemia (<92%) and on the following symptoms and signs: progressive dyspnea at rest (>20 respirations), tachycardia (>90 beats/min), diaphoresis, cyanosis, dullness on percussion, crepitation rales, [15] and gold standard -roentgenographic evidence of fluid existence. ITI measurements were taken continuously.…”

Section: Methodsmentioning

confidence: 99%

“…The result is the value of internal thoracic electrical resistance (impedance), the ITI. These method by which ITI is estimated is described in detail elsewhere [8,15].…”

Section: Methodsmentioning

confidence: 99%

“…In previous studies we have shown the suitability of the RS-207 monitor (R. S. Medical Monitoring, Jerusalem, Israel) for measuring ITI and early diagnosis of pulmonary edema and pleural effusion from different etiologies [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. So far, not any studies have dealt with early diagnosis of pleural effusion in pure HF cohort who, most frequently, suffer from pleural effusion, by use of this noninvasive and inexpensive method.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the currently available methods for the early detection and monitoring of pulmonary edema were not studied for pleural effusion and are not sufficiently reliable and may themselves lead to complications [1][2][3][4][5][6][7][8][9][10]. The changes in the extravascular fluid content in the lungs in humans and animals can be easily monitored by a noninvasive procedure based on impedance plethysmography of right lung [8][9][10][11][12][13][14][15]. Total transthoracic impedance (TTI) consists of ITI and skin contact impedance.…”

Section: Introductionmentioning

confidence: 99%

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The Usefulness of Monitoring Pleural Effusion Treatment by the Internal Thoracic Impedance Method

2015

JCCR

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The Edema Guard Monitor (EGM) model Jerusalem, Israel [12], in contrast to the other currently available impedance monitors, measures the ITI of the right lung, which roughly equals lung impedance, by automatically calculating skin electrode impedance and subtracting it from Research Article AbstractBackground: Internal thoracic impedance (ITI) is a sensitive and reliable method used to detect pulmonary fluids accumulation as, pulmonary edema or pleural effusion. The current study deals with this noninvasive method in heart failure patients, its usefulness in detecting pleural effusion before the appearance of clinical symptoms and for demonstrating increased ITI during its resolution. Methods:A prospective controlled study performed in a single department of internal medicine belonging to a university-affiliated hospital between the years -2012-2013. Sixty two patients (ages ranging from 41 to 94) were recruited for the study, of whom 31 with bilateral or right pleural effusion of any etiology (study group) and 31without pleural effusion (control group) who were admitted because of heart failure (HF). ITI was continuously measured by the RS-207 monitor. The predictive value of ITI monitoring was determined by 8 measurements taken every 8 hours. Pleural effusion was diagnosed and followed by main clinical signs and also chest X ray as a gold standard modality before and at the end of the monitoring. Results:During the 56 hours of treatment, the median ITI of the study group increased by 21.5% -from 33.1±4.2 to 42.1±3.9 ohm (P < 0.001) as compared to the non significant changes in the control group 59.4±5.2 (P = NS). Prominent changes were observed in the respiratory rate (RR) of the study group: there was a decrease from 31.2±4.2to 19.7±2.3 (36.5%) -as compared to no changes for the controls, and a mean increase of elevation from 83.5±5.3% (9.1%) in O2 saturation to 92.4±1.5% as compared to94.3±2.1 (p-NS) for the controls. Conclusion:ITI methodology is useful for the diagnosis and monitoring of treatment of HF patients with pleural effusion as it enables diagnosis in the preclinical stage. ITI may provide early and better treatment, and can prevent complications such as respiratory distress, intubation and make hospitalization unnecessary. There were no significant ITI changes in HF patients as compared to the mixed general population.

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“…the TTI [8,15]. These results showed much higher sensitivity compared with the 1.5% changes found when using TTI methods.…”

Section: Introductionmentioning

confidence: 88%

Section: Methodsmentioning

confidence: 99%

“…The result is the value of internal thoracic electrical resistance (impedance), the ITI. These method by which ITI is estimated is described in detail elsewhere [8,15].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Usefulness of Monitoring Pleural Effusion Treatment by the Internal Thoracic Impedance Method

2015

JCCR

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Monitoring of body fluid in patients with chronic heart failure using Bioimpedance - Spectroscopy

et al. 2009

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Patients with chronic heart failure (CHF) often suffer from the formation of edema within their body. To monitor the appearance of such edema in lung and limbs as early as possible would improve the medical treatment fundamentally. Bioimpedance-Spectroscopy is a non-invasive, easyto-implement measurement method that allows determining the water content of a patient. However, stable long term measurements are difficult to perform and so the optimal measurement conditions have to be defined precisely. In the past, a lot of work was focused on the development of the optimal measurement setup that allows stable and reproducible longterm monitoring of edema. Based on these investigations, a measurement protocol was developed and within this study, case reports shall be presented in which five patients suffering from acutely decompensated CHF were monitored during their complete medical treatment in the clinic. Every day, the whole body-and thoracic impedance were measured to monitor the progress of edema in the limbs and lung, respectively.

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Prediction of cardiogenic pulmonary edema onset by monitoring right lung impedance

et al. 2006

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Transthoracic monitoring of the impedance of the right lung in patients with cardiogenic pulmonary edema

Abstract: The RS-205 is suitable for monitoring patients at high risk of CPE development. It enables detection of CPE and the monitoring of patients at all stages of CPE.

Cited by 34 publications

References 22 publications

The Usefulness of Monitoring Pleural Effusion Treatment by the Internal Thoracic Impedance Method

The Usefulness of Monitoring Pleural Effusion Treatment by the Internal Thoracic Impedance Method

Monitoring of body fluid in patients with chronic heart failure using Bioimpedance - Spectroscopy

Prediction of cardiogenic pulmonary edema onset by monitoring right lung impedance

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