Related Experiment Video
Updated: Feb 16, 2026

07:41
Isolation and Culture of Primary Retinal Müller Cells from Sprague-Dawley (SD) Rats
Published on: June 17, 2025
940
Reference ranges for rotational thromboelastometry in male Sprague Dawley rats
Mariana Vigiola Cruz1,2,3, Jenna N Luker1, Bonnie C Carney1
1Firefighters' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC USA.
Thrombosis Journal
|January 5, 2018
Summary
This study establishes reference ranges for rat coagulation parameters using the ROTEM® delta hemostasis analyzer. These findings aid in identifying coagulopathies in future rat studies.
Area of Science:
- Veterinary Hematology
- Hemostasis Research
- Rodent Models
Background:
- Investigating the extrinsic pathway of coagulation in Sprague Dawley rats.
- Utilizing citrated whole blood samples and a mini cup and pin system for functional coagulation assays.
Purpose of the Study:
- To establish reference ranges for coagulation parameters in healthy adult male Sprague Dawley rats.
- To provide a baseline for identifying coagulopathies in rat models.
Main Methods:
- Employing the ROTEM® delta hemostasis analyzer with the EXTEM test.
- Analyzing data from forty-three healthy adult male Sprague Dawley rats.
Main Results:
- Determined reference ranges (2.5-97.5 percentiles) for key coagulation parameters.
- Established ranges include CT [18-77], CFT [20-80], α [73-86], MCF [53-70], and ML [1-22].
- Provided comprehensive coagulation profiles for the study population.
Conclusions:
- The established reference ranges are crucial for future research involving rat coagulation.
- These ranges will facilitate the accurate identification of clinically significant coagulopathies in rats.
- This study provides a valuable resource for toxicological and pharmacological research in rats.
Related Concept Videos
Variation: Normal Distribution, Range, and Standard Deviation
28.8K
In the field of psychology, there are several ways to organize measurements of a trait, feature, or characteristic (i.e., variables). Qualitative data, such as ethnicity, can be tabulated into a frequency count to provide information about the proportion, as well as the variety of groups in a sample or population. On the other hand, researchers can perform a wider set of calculations on quantitative data. The mean, mode, and median, for instance, are central tendency measures to identify a...
28.8K
Range
14.5K
The range is one of the measures of variation. It can be defined as the difference between a dataset's highest and lowest values. For example, in the study of seven 16-ounce soda cans, the filled volume of soda was measured, thus producing the following amount (in ounces) of soda:
15.9; 16.1; 15.2; 14.8; 15.8; 15.9; 16.0; 15.5
Measurements of the amount of soda in a 16-ounce can vary since different subjects record these measurements or since the exact amount - 16 ounces of liquid, was not...
15.9; 16.1; 15.2; 14.8; 15.8; 15.9; 16.0; 15.5
Measurements of the amount of soda in a 16-ounce can vary since different subjects record these measurements or since the exact amount - 16 ounces of liquid, was not...
14.5K
Inertial Frames of Reference
9.0K
Newton’s first law is usually considered to be a statement about reference frames. It provides a method for identifying a special type of reference frame: the inertial reference frame. In principle, we can make the net force on a body zero. If its velocity relative to a given frame is constant, then that frame is said to be inertial. So, by definition, an inertial reference frame is a reference frame where Newton's first law holds valid. Newton's first law applies to objects with...
9.0K
Non-inertial Frames of Reference
7.3K
A reference frame accelerating or decelerating relative to an inertial frame is a non-inertial frame. To help understand this, consider what taking off in an airplane, turning a corner in a car, riding a merry-go-round, and the circular motion of a tropical cyclone all have in common. All these systems are accelerating, decelerating, or rotating relative to the Earth; hence, they all are non-inertial frames. All these systems exhibit inertial forces, which merely seem to arise from motion,...
7.3K
Infertility in Males
584
Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...
584
¹H NMR: Long-Range Coupling
2.7K
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
2.7K

