Medical term:

strain


strain

 [strān]
1. to overexercise.
2. excessive effort or exercise.
3. an overstretching or overexertion of some part of the musculature.
4. to filter or separate.
5. a group of organisms within a species or variety, characterized by some particular quality, as rough or smooth strains of bacteria.
caregiver role strain a nursing diagnosis accepted by the North American Nursing Diagnosis Association, defined as difficulty performing the caregiver role.
risk for caregiver role strain a nursing diagnosis accepted by the North American Nursing Diagnosis Association, defined as vulnerability of a caregiver for felt difficulty performing the caregiver role.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

strain

(strān),
1. A population of homogeneous organisms possessing a set of defined characteristics; in bacteriology, the set of descendants that retains the characteristics of the ancestor; members of a strain that subsequently differ from the original isolate are regarded as belonging either to a substrain of the original strain, or to a new strain
2. Specific host cell(s) designed or selected to optimize production of recombinant products.
3. To make an effort to the limit of one's strength.
4. To injure by overuse or improper use (usually refers to a muscle tear).
5. An act of straining.
6. Injury resulting from strain or overuse.
7. The change in shape that a body undergoes when acted on by an external force.
8. To filter; to percolate.
Farlex Partner Medical Dictionary © Farlex 2012

strain 1

(strān)
v.
1. To pull, draw, or stretch tight.
2. To stretch or exert one's muscles or nerves to the utmost.
3. To injure or impair by overuse or overexertion; wrench.
4. To pass a liquid through a filtering agent.
5. To draw off or remove by filtration.
n.
1. The act of straining.
2. The state of being strained.
3. Extreme or laborious effort, exertion, or work.
4. A great or excessive pressure, demand, or stress on one's body, mind, or resources.
5. A wrench, twist, or other physical injury resulting from excessive tension, effort, or use.

strain 2

(strān)
n.
1. Biology
a. A group of bacteria or viruses that are genetically distinct from other groups of the same species.
b. A group of cultivated plants or domestic animals of the same species that have distinctive characteristics but are not considered a separate breed or variety.
2.
a. The collective descendants of a common ancestor; a race, stock, line, or breed.
b. Any of the various lines of ancestry united in an individual or a family; ancestry or lineage.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

strain

noun AIDS An HIV isolate from a person or group of persons given its own unique identifier, or strain name–eg, MN, LAI Orthopedics An overuse injury verb To injure by overuse; to wear out or stress beyond normal limits; straining may be associated with tissue microtearing Ophthalmology Overuse of eyes, resulting in transient discomfort Vox populi verb To filter; remove particles from a fluid
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

strain

(strān)
1. A population of homogeneous organisms possessing a set of defined characters. bacteriology The set of descendants that retains the characteristics of the ancestor; members of a strain that subsequently differ from the original isolate are regarded as belonging either to a substrain of the original strain, or to a new strain.
2. Specific host cell(s) designed or selected to optimize production of recombinant products.
3. To make an effort to the limit of one's strength.
4. To injure by overuse or improper use.
5. An act of straining.
6. Injury resulting from tensile force to muscle or tendon, especially skeletal muscles.
7. The change in shape that a body undergoes when acted on by an external stress.
8. To filter; to percolate.
[A.S. strēon, progeny]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

strain

Stretching or tearing of muscle fibres, usually in the course of athletic overactivity. There is swelling, pain, bruising and a tendency to muscle spasm. Treatment is by rest, STRAPPING and painkilling drugs.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

strain

a group of organisms within a species or variety, distinguished by one or more minor characteristics.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

strain 

1. Internal tension in a lens due to poor annealing, or to glass of a non-uniform coefficient of expansion, or from external pressure on the edge of a glass spectacle lens. It results in birefringence, which is observed with a polariscope.
2. To overwork a faculty (e.g. eyestrain caused by sustained vision of near point objects); or a part of the body (e.g. muscles); or a system (e.g. the effect on corneal metabolism of a closed eye wearing a PMMA lens. This is often referred to as
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann

strain

(strān)
1. Population of homogeneous organisms possessing a set of defined characteristics.
2. Specific host cell(s) designed or selected to optimize production of recombinant products.
3. To make an effort to the limit of one's strength.
4. To injure by overuse or improper use (usually refers to a muscle tear).
5. An act of straining.
6. Injury resulting from strain or overuse.
7. Change in shape that a body undergoes when acted on by an external force.
8. To filter; to percolate.
[A.S. strēon, progeny]
Medical Dictionary for the Dental Professions © Farlex 2012

Patient discussion about strain

Q. My doctor advised me not to strain much. My doctor advised me not to strain much. What if I am physically unable to exercise due to a medical condition?

A. Your doctor is more concerned about your health. So accept his advice and improve in your health. There is virtually no medical condition that will keep you from doing any type of exercise. Even people with heart failure -- who were long told not to exercise at all -- can benefit from moderate amounts of activity. And people with limited mobility can often do water exercises, or do yoga or other exercises while seated in a chair (some "chair exercise" videos are now on the market). Of course, if you have any medical condition, check with your doctor before starting any exercise program.

Q. shoulder and neck strain and pain I have a terrible shoulder and neck pain and i keep cracking my neck muscles to release pressure. I get temporary relief with tylenol but after few hrs the pain and strain starts again.Any ideas?

A. A mellow exercise and streching on a regular basis is the best way to release a sore back and muscles in general, including your neck. You should try that plus applying local warm temperature (for example a warm pillow)around your neck. If that doesn't work then other anti-inflammatory drugs that you either apply as a cream or take as a pill can help you.

Q. any tips for low back strain? I'm an athlete, been having maaaajor lower back pain lately, during sports mainly but also when I just get out of bed in the morning. I was never like this- I'm really into sports and never felt so old in my life!!! Dont think the doctors really know their way with me, was hoping for some tips from your side. thanx

A. Take Ibuprofen. I take 600mg and helps a lot. Also stretch like crazy -- three times a day if you can. Stretch you hamstring totally. You need to be very limber all the time. You should also lay off on exercising for a bit. Wait for the irritations to go down. Do tons of back and stomach exercises -- only after the irritation goes down. First thing in the morning is get out of bed, turn toward your bed,lift your leg on the bed and stretch you legs. Lots of things to do. Don't wait too long to see a doctor - it doesn't help not seeing a doc. The best a doc can do is give you an MRI. Xrays are ok but an MRI tells the story. I know, I had two back operations and have a bad back for 30 years (I am 49). Had my operations 7 months ago and now I lift almost every day (I don't lift as much -- just a lot of reps). Good luck.

More discussions about strain
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strainer

(stran'er)
1. A device for retaining solid pieces while liquid passes through. Synonym: filter
2. In river rescue, a place where water moves through grating, wire mesh, or downed trees.
Medical Dictionary, © 2009 Farlex and Partners

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