Injection preparation

Injection preparation of a bull's testicle (blood vessels filled with red gelatin)

An injection preparation represents anatomical cavity systems such as the urinary tract , airways , bile duct system and blood vessels by means of an injection in three dimensions.

Circulus arteriosus cerebri of a sheep. Corrosion preparation with a methacrylate ( Kallocryl )

For this purpose, the freshly removed organ is flushed through and then a liquid or hardening compound is injected. The liquids are such. B. Indian ink or X-ray contrast medium is used. Hardening compounds are z. B .:

• Low-melting metal alloys ( Wood's metal )
• Putty-like masses
• gelatin
• Natural rubber
• Polymerizing synthetic resins

The tissue can be subsequently dissolved with potassium hydroxide solution . What remains is the negative spout of the system, which is then referred to as the corrosion compound. This allows a cavity system to be fully demonstrated. The specimens obtained can now be examined either macroscopically or under a scanning electron microscope . To protect the fine structures, the preparation can then be poured into a transparent synthetic resin ( embedding preparation ). The same effect can be achieved by lightening the fabric like split wood .

literature

• Rudolf Piechocki, Hans-Jürgen Altner: Macroscopic preparation technique. Part 1: Vertebrates: A Guide to Collecting, Dissecting, and Preserving. 5th edition. Spectrum Academic Publishing House, 1998, ISBN 3-437-35190-7 .

Individual evidence

1. ^ Josef Hyrtl : The corrosion anatomy and its results. Vienna 1873.