blocking

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blocking

 [blok´ing]
1. interruption of an afferent nerve pathway (see block).
2. inhibition of an intracellular biosynthetic process; metabolic block.
3. thought blocking or thought deprivation; sudden cessation of the train of thought or speech, such as may occur in a period of extreme emotion or when a repressed painful thought is approached.
4. casting of tissue blocks in an embedding medium such as paraffin wax so that sections can be cut with a microtome.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

block·ing

(blok'ing),
1. Obstructing; arresting passage, conduction, or transmission.
2. In psychoanalysis, a sudden break in free association occurring when a painful subject or repressed complex is touched.
3. Sudden cessation of thoughts and speech, which may indicate the presence of a severe thought disorder or a psychosis.
Farlex Partner Medical Dictionary © Farlex 2012

blocking

Histology
The use of a chemical—acetylation, methylation, saponification or immunologic—digestion with hyaluronidase or sialidase method to prevent nonspecific binding of unwanted substances in a reaction.
 
Immunology
The reduction or elimination of nonspecific binding of an antibody to an epitope, which is accomplished by washing a specimen with the serum of a mammal other than one used in the assay system; blocking is the first step in ELISA.

Neurology
A phenomenon seen in neuromuscular junction disease (e.g., myasthenia gravis), where in testing of 2 single muscle fibres for jitter, one may intermittently fail to fire due to a failure of impulse conduction.
 
Psychiatry
An abrupt cessation of thoughts and mental activity or spontaneous flow of thinking or speaking, perceived as an absence or deprivation of thought.
 
Conditions causing
Organic brain disease, schizophrenia.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

blocking

Clinical trials The process of establishing defined groups, as in a treatment schedule designed to ensure a specific allocation ratio
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

block·ing

(blok'ing)
1. Obstructing; arresting passage, conduction, or transmission.
2. In psychoanalysis, a sudden break in free association occurring when a painful subject or repressed complex is touched.
3. Sudden cessation of thoughts and speech, which may indicate the presence of a severe thought disorder or a psychosis.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

blocking

1. The injection of a local anaesthetic around a nerve to prevent the passage of sensory impulses.
2. Involuntary interruption of a train of thought by emotional upset or psychotic disorder.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

blocking 

The mounting of one or a number of lens blanks on a holder to form a unit (termed a 'block') ready for surfacing. The lens blanks are cemented with pitch, wax, etc. See surfacing.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann

block·ing

(blok'ing)
Obstructing; arresting passage, conduction, or transmission.
Medical Dictionary for the Dental Professions © Farlex 2012

Patient discussion about blocking

Q. what does a sun block cream do? and what are a UV rays?

A. It blocks out harmful Ultra violet rays from the skin as the previous entries have related; however it can also block your ability to produce vitamin D. If you live in a northerly area or one that receives limited sunlight, its recommended to get at least 15 minutes of sun a day (this is probably best done with minimal sunblock) and according to personnal sun sensitivity. Another thing to keep in mind is that sunblock works best if applied 20 minutes before sun exposure.

Q. my son is 5 and half yrs old.he is having veezing and 75%block in one nose because of adenod.is is curable he has taken steriods for one and half yrs but with not much relief for veezing. then we switched on to ayur medicines,where he had some pigmentation at some places in his body. so again we are back to allopathy. he has one nasal steriod spray now with few other medicines. in his last test, dr, said he has adenod about 75% blcok in one nose, he has prescribed medicines for one month. he has also said that a small surgery can be done to remove adenod. i would like to know how long this surgry wil take and how much of rest he wil have to take. and if this adenod is removed, wil his other problem like veezing be cured? indira rajesh

A. it's a pretty common surgery from what i remember. most of our family has any kind of nasal problem...sinusitis..adenoids...just name it. the surgery is entering through the mouth (under full sedation) and lasering/curetting - removed. it took about a week to recover , eating soft foods..and it worked!

More discussions about blocking
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References in periodicals archive ?
Neuromuscular blocking agents decrease inflammatory response in patients presenting with acute respiratory distress syndrome.
However, not all substrates (e.g., plastics) and applications can accommodate such high temperatures for deblocking, thus, the possibility to optimize deblocking conditions can be a valuable tool to further expand the applicability of 3-pentadeca-dienylphenol as a label-friendly polyurethane prepolymers' blocking agent.
Biodegradable neuromuscular blocking agents. Part 4: atracurium besylate and related polyalkylene diesters.
Allergy to neuromuscular blocking agents. Presse Med 2016; 45(9): 768-73.
Hypersensitive reactions to neuromuscular blocking agents may be due to nonspecific histamine release from mast cells [anaphylactoid reaction] or may be IgE mediated hypersensitive reactions [anaphylactic reaction]or may be due to high affinity to M2 muscarinic receptors leading to an augmented parasympathetic response to intubation causing severe bronchospasm mediated via M3 muscarinic receptors.
So atracurium, one special non-depolarization neuromuscular blocking agent that is metabolized and eliminated independently on hepatic and renal function1, is regarded as an optimal candidate for inducing in general anesthesia.
In a previous study, 3 different neuromuscular blocking agents were applied locally to induce mydriasis in kestrels.
In our case, treatment with a beta blocking agent might have been responsible for persistent coronary spasm.
Upper airway obstruction with respiratory compromise may be due to neuromuscular blocking agents (NMBA) alone, but various disease states, anaesthetic agents, benzodiazepines and opioid drugs may also contribute.
Especially troubling, according to ISMP, is the fact that most drugs involved in the shortages are high-alert medications that are more likely to cause serious patient harm when involved in an error (such as propofol, heparin, morphine, neuromuscular blocking agents and chemotherapy agents).
The researchers' next step will be to create a mouse model with mixed cell glioblastoma that can be used to test different therapeutics, inhibitors and blocking agents.