Reciprocal relative time (recip.rel.time)
Abbreviation 
Recip.rel.time  

Definition in words 
Time of component B in system 2 divided by time of component in system 1 Note 1: System 1 is unrelated to system 2 Note 2: System 2 can be a reference system (also called “norm”) that is defined by the laboratory 

Definition by equation 

Systematic terms

Reciprocal relative time of component B in system 1  
Ratio scale 

Numerical values from 0∞  
Unit 
10^{6}, 10^{3}, 1 (one), 10^{3}, 10^{6}, etc. The unit “1” (one) is ommited in the NPU syntax. 

Reference 
Ferard G, Dybkaer R, FuentesArderiu X. Compendium of Terminology and Nomenclature of Properties in Clinical Laboratory Sciences : Recommendations 2016. 1 ed: Royal Society of Chemistry; 2016. 182 p. Doi:10.1039/9781782622451. 
Laboratory field 
Examples 


Thrombosis and Haemostasis

Example 1  
Generic abbreviated 
NPU01680 P—Coagulation, surfaceinduced; recip.rel.time(norm/actual; proc.) = ?  
Full result  NPU01680 Plasma—Coagulation, surfaceinduced; reciprocal relative time(norm/actual; procedure) = 1.25 x one  
Abbreviated result  NPU01680 P—Coagulation, surfaceinduced; recip.rel.time(norm/actual; proc.) = 1.25  
Written expression  The reciprocal relative time of surfaceinduced Coagulation in Mr. Smith’s plasma is [1.25]. The calculation is performed by dividing the time of surfaceinduced Coagulation in a norm (reference system) with the time of surfaceinduced Coagulation in Mr. Smith’s plasma. The measurement is performed according to procedure defined by the laboratory.  
Equation



Example 2  
Generic abbreviated 
NPU27548 P—Coagulation, tissue factorinduced; recip.rel.time(norm/actual; II+V+VII+X; proc.) = ?  
Full result  NPU27548 Plasma—Coagulation, tissue factorinduced; reciprocal relative time(norm/actual; II+V+VII+X; procedure) = 1.11 x one  
Abbreviated result  NPU27548 P—Coagulation, tissue factorinduced; recip.rel.time(norm/actual; II+V+VII+X; proc.) = 1.11  
Written expression  The reciprocal relative time of tissue factorinduced Coagulation in Mr. Smith’s plasma is [1.11]. The calculation is performed by dividing the time of tissue factorinduced Coagulation in a norm (reference system) with the time of tissue factorinduced Coagulation in Mr. Smith’s plasma. The measurement is performed according to procedure defined by the laboratory.  
Equation 


Reference 
NPU database, https://www.ifcc.org/ifccscientificdivision/sdcommittees/cnpu/npusearch/ and http://www.labterm.dk/default.aspx 

Kindofproperty

Nominal kindofproperty

Kindofquantity

Unitary kindofquantity

Rational unitary kindofquantity

Reciprocal relative time




Reference 

Date  Term  Note 

19960101  Reciprocal relative time  Term established 
NPU term identifier 
QU50062 