Laser angioplasty with a metal laser probe ('hot tip'): Probe temperature in blood

Rudolf M. Verdaasdonk; Cornelius Borst; Luc H M A Boulanger; Martin J C van Gemert

doi:10.1007/BF02594153

Laser angioplasty with a metal laser probe ('hot tip'): Probe temperature in blood

Rudolf M. Verdaasdonk^*, Cornelius Borst, Luc H M A Boulanger, Martin J C van Gemert

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

In vitro experiments to determine the physical characteristics of a metal laser probe for laser angioplasty are described. The probe was filmed in stationary saline and plasma. The temperature of the probe was measured with thermocouples in air, stationary saline, whole blood, diluted packed cells (40%) and plasma. In the latter three media an envelope of denatured blood elements was found on the probe. This envelope entrapped a vapour layer which acts as an effective insulator, allowing the probe temperature to reach 600°C within 3 s of application of 10 W from an neodymium-YAG laser. Our observations suggest that the transfer of heat from the metal to the tissue will depend both on the formation and destruction of this thermally insulating envelope, which may well protect the arterial wall from heat injury during laser angioplasty.

Original language	English
Pages (from-to)	153-158
Number of pages	6
Journal	Lasers in medical science
Volume	2
Issue number	3
DOIs	https://doi.org/10.1007/BF02594153
Publication status	Published - 1 Sept 1987
Externally published	Yes

Keywords

Hot tip
Laser angioplasty
Metal laser probe

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10.1007/BF02594153

Verdaasdonk1987_Article_LaserAngioplastyWithAMetalLaseFinal published version, 803 KB

Cite this

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title = "Laser angioplasty with a metal laser probe ('hot tip'): Probe temperature in blood",

abstract = "In vitro experiments to determine the physical characteristics of a metal laser probe for laser angioplasty are described. The probe was filmed in stationary saline and plasma. The temperature of the probe was measured with thermocouples in air, stationary saline, whole blood, diluted packed cells (40%) and plasma. In the latter three media an envelope of denatured blood elements was found on the probe. This envelope entrapped a vapour layer which acts as an effective insulator, allowing the probe temperature to reach 600°C within 3 s of application of 10 W from an neodymium-YAG laser. Our observations suggest that the transfer of heat from the metal to the tissue will depend both on the formation and destruction of this thermally insulating envelope, which may well protect the arterial wall from heat injury during laser angioplasty.",

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AU - Verdaasdonk, Rudolf M.

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AU - van Gemert, Martin J C

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AB - In vitro experiments to determine the physical characteristics of a metal laser probe for laser angioplasty are described. The probe was filmed in stationary saline and plasma. The temperature of the probe was measured with thermocouples in air, stationary saline, whole blood, diluted packed cells (40%) and plasma. In the latter three media an envelope of denatured blood elements was found on the probe. This envelope entrapped a vapour layer which acts as an effective insulator, allowing the probe temperature to reach 600°C within 3 s of application of 10 W from an neodymium-YAG laser. Our observations suggest that the transfer of heat from the metal to the tissue will depend both on the formation and destruction of this thermally insulating envelope, which may well protect the arterial wall from heat injury during laser angioplasty.

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