Renewed Interest in Gases for Contrast Roentgenography

Burko, Henry; Ec, Klatte

doi:10.2214/ajr.99.3.645

Cited by 21 publications

(2 citation statements)

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“…Initially it was used for retroperitoneal insufflation, where it was shown to be much safer than air or oxygen [3]. Its use as an intravascular agent began with intravenous injections of 50-100 cc for the detection of pericardial effusion [4].…”

Section: Discussionmentioning

confidence: 99%

Limited usefulness of carbon dioxide as a contrast agent for cholangiography

Smith

Young

Hunter

et al. 1987

Gastrointest Radiol

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Carbon dioxide (CO2) was unsuccessfully used as a biliary contrast agent in 9 of 10 patients undergoing percutaneous transhepatic cholangiography prior to biliary drainage. The technique involved hand injection of 10-20 cc CO2 through the Chiba needle in an attempt to fill preferentially the anterior biliary radicals. Although CO2 remains a useful agent in many instances, particularly for percutaneous nephrostomy, its usefulness in the biliary tract is severely limited.

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Section: Discussionmentioning

confidence: 99%

Limited usefulness of carbon dioxide as a contrast agent for cholangiography

Smith

Young

Hunter

et al. 1987

Gastrointest Radiol

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“…Zu Beginn dieses Jahrhunderts wurden als Gase in erster Linie Luft, aber auch Sauerstoff und Stickstoff eingesetzt, bis ab den fünfziger Jahren infolge seiner geringen Komplikationsrate immer mehr zum Kohlendioxid übergegangen wurde [3,6,13,14,16,18]. Daneben stehen schon seit langer Zeit auch Gase als negative Kontrastmittel zur Verfügung, die die Absorption der Röntgenstrahlung im Körper vermindern.…”

Section: Introductionunclassified

CO 2 -Angiographie: Untersuchungen zur Gasausfüllung der Gefäße und Erfassung von Einflußfaktoren auf den Injektionsvorgang am Kreislaufmodell - CO2-Angiography: Measurement of Vascular Gas-filling and Evaluation of Parameters Influencing Gas Injection using a Circulatory System Model

König

Krasny²

1991

Biomedizinische Technik/Biomedical Engineering

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Following the advent of digital subtraction angiography (DSA), carbon dioxide gas has become a useful contrast agent for arterial angiography. Former manual injection methods had precluded accurate dosing and reproducibility. An original gas injector was therefore developed and tested in a circulatory system model. This permitted an accurate evaluation of vascular gas-filling. it also proved possible to measure the injection parameters taking different influencing factors into account. It was shown that vessels up to 10 mm in diameter are virtually completely filled with gas. In vessels larger than 10 mm in diameter, a residual fluid level remains, which in turn reduces the possibility for complete vessel imaging. The injection flow is dependent primarily on the vascular circulation rate, vessel diameter and the inclination of the vessel. With respect to other factors examined, neither catheter size, number of holes nor the direction of the injection have any relevant influence.

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Effect of CO₂ and blood media on laser probe temperature

et al. 1989

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Blood may limit laser ablation of arterial plaque by decreasing thermal energy transfer from metal-capped probes to arterial occlusions. Since a gas is a good insulator of heat, CO2 may be a better medium for laser recanalization. To study this possibility, a metal-capped fiber was positioned in a segment of blood-filled polyethylene tubing and activated with an argon laser. Probe temperatures were measured in blood and as the blood was displaced by flowing CO2 gas. Probe temperatures were higher at all powers studied in CO2 gas than in blood. Maximum probe temperatures averaged 518 +/- 24 degrees C after CO2 infusion versus 320 +/- 7 degrees C in blood, (P less than 0.0001). Blood aggregate formation was noted on the probe surface in blood but not in CO2 medium. Thus CO2 gas may be a preferable medium for laser recanalization, since higher probe temperatures are achieved, and the probe surface remains free of insulating blood coagulate.

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Renewed Interest in Gases for Contrast Roentgenography

Cited by 21 publications

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Limited usefulness of carbon dioxide as a contrast agent for cholangiography

Limited usefulness of carbon dioxide as a contrast agent for cholangiography

CO 2 -Angiographie: Untersuchungen zur Gasausfüllung der Gefäße und Erfassung von Einflußfaktoren auf den Injektionsvorgang am Kreislaufmodell - CO2-Angiography: Measurement of Vascular Gas-filling and Evaluation of Parameters Influencing Gas Injection using a Circulatory System Model

Effect of CO₂ and blood media on laser probe temperature

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Renewed Interest in Gases for Contrast Roentgenography

Cited by 21 publications

References 0 publications

Limited usefulness of carbon dioxide as a contrast agent for cholangiography

Limited usefulness of carbon dioxide as a contrast agent for cholangiography

CO 2 -Angiographie: Untersuchungen zur Gasausfüllung der Gefäße und Erfassung von Einflußfaktoren auf den Injektionsvorgang am Kreislaufmodell - CO2-Angiography: Measurement of Vascular Gas-filling and Evaluation of Parameters Influencing Gas Injection using a Circulatory System Model

Effect of CO2 and blood media on laser probe temperature

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Effect of CO₂ and blood media on laser probe temperature