Transcript SELDINGERS TEKNIKK

SELDINGERS TEKNIKK
SVEN-IVAR SELDINGER (1921-1999), radiologist, was born in Mora,
Sweden. Graduating in medicine from the Karolinska Institute in 1948, he began
his training in radiology in 1950. In 1953, Dr. Seldinger published the description
of a percutaneous entry technique in the journal, Acta Radiologica. The
equipment required to perform the basic technique includes only (1) a thinwall
introducer needle, (2) a wire guide and (3) a plastic preformed catheter.
Through a simple puncture, access is gained to any part of the body via the
cardiovascular system, using a series of x-ray films as a guide.
Dr. Seldinger pioneered in applying his technique to the localization of tumors
by arteriography, selective renal angiography, percutaneous transhepatic
cholangiography, and portal venography.
The simplicity of the Seldinger technique which continues to revolutionize
cardiology and radiology has provided the catalyst for innovative application in
the areas of interventional radiology, urology, anesthesiology and critical care
medicine.
Høgskolen i Oslo
Seldingers teknikk
Miscellaneous /Atherectomy
Some catheter-based devices actually remove
the plaque itself, a process known as
atherectomy, or ablation. There are a number of
different types. One works like a shaver, cutting
the soft plaque from the obstruction site and
depositing it in a capsule which is then
withdrawn. Another model cuts the plaque and
suctions it away.
Atherocath
courtesy Guidant
Laser
Some catheters have also been fitted with
special lasers which can photo-dissolve the
tissue obstructing the arteries.
Laser catheter
courtesy Spectranetics
Rotablator
If the plaque has hardened, and become
calcified, the interventional cardiologist can
use a device, called a rotational
atherectomy catheter: an olive-shaped
diamond burr which rotates at extremely
high speed and works like a sander to
pulverize the obstruction into harmless
microscopic particles that are washed away
by the blood.
Rotablator
courtesy
Boston Scientific
Rotablator
Atherectomy
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http://www.nms.ac.jp/jnms/2000/06705335e.pdf
Bildeforsterker/DSA
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Fluoroscopic Imaging kap. 12
Digital Radiography kap. 22
Begge kapitler finner du i Christensen’s
Physics of Diagnostic Radiology. Fourth
edition