A new type of syringe holder for performance of indicator-dilution curves

1964 ◽  
Vol 19 (5) ◽  
pp. 1022-1023 ◽  
Author(s):  
Robert W. Benson ◽  
L. Jerome Krovetz ◽  
Gerold L. Schiebler
Keyword(s):  
Precise Determination ◽  
Indicator Dilution ◽  
Constant Volume ◽  
Dilution Curve ◽  
Appearance Time ◽  
Time Marker ◽  
Indicator Dilution Curve ◽  
New Type ◽  
Dilution Curves

A new type of syringe holder, simple and rugged, has been designed to combine a constant volume syringe with an electrical time marker initiator. The latter allows a precise determination of the appearance time of an indicator-dilution curve. appearance time Submitted on March 2, 1964

A small, lightweight precordial counter for determination of cardiac output

1965 ◽  
Vol 20 (6) ◽  
pp. 1365-1366 ◽  
Author(s):  
Ralph J. Gorten
Keyword(s):  
Cardiac Output ◽  
Scintillation Detector ◽  
Treadmill Exercise ◽  
Bicycle Ergometer ◽  
Indicator Dilution ◽  
Energy Gamma ◽  
Lead Shielding ◽  
Thin Crystal ◽  
Dilution Curves

A compact, lightweight scintillation detector which can be firmly attached to the anterior chest was fabricated in order to better adapt the isotope-precordial counting technic for measurements of cardiac output during exercise. In this manner useful indicator-dilution curves can be obtained without arterial puncture at light-to-heavy levels of bicycle ergometer or treadmill exercise. The use of a thin crystal and the omission of lead shielding and collimation of the detector is possible with a soft-energy gamma-emitting indicator of blood flow such as iodinated (I125) albumin. cardiac output during exercise; lightweight precordial scintillation detector; iodione 125; isotope-precordial counting technic Submitted on May 28, 1965

scholarly journals Estimation of instantaneous flow from the indicator-dilution curve after bolus injection of indicator

1987 ◽  
Vol 25 (1) ◽  
pp. 51-56
Author(s):  
E. A. von Reth ◽  
M. J. F. P. Pluym ◽  
A. A. van Steenhoven ◽  
J. Poulis ◽  
A. Versprille
Keyword(s):  
Bolus Injection ◽  
Indicator Dilution ◽  
Dilution Curve ◽  
Indicator Dilution Curve ◽  
Instantaneous Flow

Evaluation of Indicator Dilution Curve Areas

1973 ◽  
Vol 78 (2) ◽  
pp. 93-97 ◽  
Author(s):  
Ebba Enghoff ◽  
Karin Sahlman ◽  
Staffan Sjögren
Keyword(s):  
Indicator Dilution ◽  
Dilution Curve ◽  
Indicator Dilution Curve

Continuously accelerating decay limbs in indicator dilution curves

1960 ◽  
Vol 15 (4) ◽  
pp. 619-623
Author(s):  
Richard A. Carleton ◽  
Walter H. Abelmann ◽  
Gilbert E. Levinson
Keyword(s):  
Small Error ◽  
Indicator Dilution ◽  
Dilution Curve ◽  
Mathematical Relationship ◽  
Pulmonic Stenosis ◽  
Unidirectional Flow ◽  
Valvular Stenosis ◽  
High Incidence ◽  
Double Chamber ◽  
Dilution Curves

Indicator dilution curves with continuously accelerating decay limbs have been produced in a model and in man by increasing flow during the dilution process. Curves of similar configuration were obtained in a model when two sequential chambers with large ratios of residual to total volume were traversed by indicator. Flow estimates computed from curves distorted by large volumes had only a small error, but those from curves distorted by increasing flow were unreliable. An analysis of 30 curves in cardiovascular normals and of 24 curves in 19 patients with mitral or pulmonic stenosis revealed continuously accelerating decay limbs in one and 13 curves, respectively. This high incidence was attributed to the large volumes occurring with valvular stenosis. A mathematical relationship is presented which defines both the contour of any dilution curve from single or double chamber unidirectional flow systems and the magnitude or the change in magnitude of the ratios of residual to total volume required to produce continuously accelerating decay limbs. Submitted on December 28, 1960

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