scholarly journals Reference ranges for Doppler parameters of the fetal aortic isthmus during the second half of pregnancy

2006 ◽  
Vol 28 (1) ◽  
pp. 71-76 ◽  
Author(s):  
M. del Río ◽  
J. M. Martínez ◽  
F. Figueras ◽  
M. López ◽  
M. Palacio ◽  
...  
Keyword(s):  
Reference Ranges ◽  
Aortic Isthmus

Reference Ranges for the Pulsatility Index of the Fetal Aortic Isthmus in Singleton and Twin Pregnancies

2015 ◽  
Vol 34 (4) ◽  
pp. 577-584 ◽  
Author(s):  
Francisco Gámez ◽  
María José Rodríguez ◽  
José María Tenías ◽  
Javier García ◽  
Pilar Pintado ◽  
...  
Keyword(s):  
Pulsatility Index ◽  
Reference Ranges ◽  
Aortic Isthmus ◽  
Twin Pregnancies

scholarly journals P13.19: Reference ranges for Doppler-assessed aortic isthmus blood flow velocity and pulsatility indices in normal human fetuses

2006 ◽  
Vol 28 (4) ◽  
pp. 593-593
Author(s):  
B. Puerto ◽  
M. Del Rio ◽  
J. M. Martínez ◽  
M. Bennasar ◽  
F. Figueras ◽  
...  
Keyword(s):  
Blood Flow ◽  
Flow Velocity ◽  
Blood Flow Velocity ◽  
Reference Ranges ◽  
Human Fetuses ◽  
Aortic Isthmus ◽  
Normal Human

1073: What are Normal Reference Ranges for Testosterone in Older Men? Results from the Massachusetts Male Aging Study

2005 ◽  
Vol 173 (4S) ◽  
pp. 291-291
Author(s):  
Beth A. Mohr ◽  
Amy B. O'Donnell ◽  
Andre Guay ◽  
John B. McKinlay
Keyword(s):  
Older Men ◽  
Reference Ranges ◽  
Normal Reference ◽  
Aging Study

Effects of Age and Health on the Euthyroid Reference Ranges for Serum Free Thyroxine and Free Triiodothyronine

1985 ◽  
Vol 24 (02) ◽  
pp. 57-65 ◽  
Author(s):  
J. E. M. Midgley ◽  
K. R. Gruner
Keyword(s):  
Lower Limit ◽  
Healthy Subjects ◽  
Thyroid Dysfunction ◽  
Reference Range ◽  
Free Thyroxine ◽  
Reference Ranges ◽  
Free Triiodothyronine ◽  
Serum Free ◽  
Young Subjects ◽  
Age Range

SummaryAge-related trends in serum free thyroxine (FT4) and free triiodothyronine (FT3) concentrations were measured in 7248 euthyroid subjects (age-range 3 months to 106 years). 5700 were patients referred to hospitals for investigation of suspected thyroid dysfunction, but who were diagnosed euthyroid. 1548 were healthy blood donors (age-range 18-63 years) with no indication of thyroid dysfunction. FT4 concentrations were little affected by the age, the sex or the state of health of the subjects in either group. Serum FT3 concentrations were significantly affected by both age and health factors. The upper limit of the euthyroid reference range for young subjects up to 15 years was about 20% higher (10.4 pmol/1) than for adult subjects older than 25 years (8.8 pmol/1). The change in the upper limits typical of young subjects to that typical of adults occurred steadily over the decade 15–25 years. After this age, little further change occurred, especially in healthy subjects. Additionally, the lower limit of the euthyroid range for FT3 was extended by the inclusion in the reference group of patients referred to hospitals. Compared with the lower limit of the FT3 range for healthy subjects (5 pmol/1), the corresponding limit for referred subjects (young or adult) was 3.5–3.8 pmol/1. Broadening of the FT3 reference range was probably brought about by a significant number of patients in the hospital-referred group with the “1OW-T3 syndrome” of mild non-thyroidal illness. Accordingly, FT3 was inferior to FT4 in the discrimination of hypothyroidism, as FT4 was unaffected by this phenomenon. Effects of age and non-thyroidal illness on serum FT3 concentrations require great care when selecting subjects for a laboratory euthyroid reference range typical of the routine workload. Constraints on the choice of subjects for FT4 reference ranges are less stringent.

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