Mobile Site ›

Test Catalog

Test ID: CYAN    
Cyanide, Blood

Method Description Describes how the test is performed and provides a method-specific reference

Hydrogen cyanide gas is released from blood by the addition of a strong acid in a sealed device (Conway). In the Conway cell, a separate chamber, containing a sodium hydroxide solution absorbs the released hydrogen cyanide gas. An aliquot from the sodium hydroxide absorption medium is then allowed to react in strong acid with pyridine, barbituric acid, and chloramine-T for subsequent development of a red color. The absorbance of the solution is used to quantitate cyanide ion.(Ames MM, Moyer TP, Kovach JS, et al: Pharmacology of amygdalin [laetrile] in cancer patients. Cancer Chemother Pharmacol 1981;6:51-57)

PDF Report Indicates whether the report includes an additional document with charts, images or other enriched information


Day(s) and Time(s) Test Performed Outlines the days and times the test is performed. This field reflects the day and time the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time required before the test is performed. Some tests are listed as continuously performed, which means assays are performed several times during the day.

Monday, Wednesday, Friday; 5 p.m.

Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.

Same day/1 day

Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result

4 days

Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

14 days

Performing Laboratory Location The location of the laboratory that performs the test