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a change or deviation.
antigenic shift a sudden, major change in the antigenicity of a virus, seen especially in influenza viruses, resulting from the recombination of the genomes of two different strains; it is associated with pandemics because hosts do not have immunity to the new strain. See also antigenic drift.
chloride shift the exchange of chloride and carbonate between the plasma and the erythrocytes that takes place when the blood gives up oxygen and receives carbon dioxide. It serves to maintain ionic equilibrium between the cell and surrounding fluid.
mediastinal shift a shifting to one side of the tissues and organs of the mediastinum; see also mediastinal shift.
shift to the left
1. a change in the blood picture, with a preponderance of young neutrophils.
2. an increased oxygen affinity of hemoglobin.
shift to the right
1. a preponderance of older neutrophils in the blood picture.
2. a decreased oxygen affinity of hemoglobin.
weight shift
1. the frequent movement of a paralyzed or partially paralyzed patient to redistribute the patient's weight and prevent impairment of circulation, which leads to pressure sores. One variation is the wheelchair pressure release.
2. relocation of a patient's center of mass in order to allow movement; see also gait.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


An alteration; in pathology, structural alteration of which the cause and significance is uncertain.
Synonym(s): shift
Farlex Partner Medical Dictionary © Farlex 2012


Vox populi
The change in a thing.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


1. Synonym(s): change.
2. A period of 8-12 hours during which an employee is assigned to work on a given day. Division of each 24 hours into day, evening, and night shifts is intended to maximize efficiency.
See also: deviation
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

Patient discussion about shift

Q. I started a new job a month ago – it’s night shifts as a security guard in a large office building I don’t know why, but I started feeling very down in the last week. Can it be that the change in waking hours is effecting me?

A. there are dozens of studies about night shift workers that try to connect them to all sort of things. and there is a good reason- our hormonal balance is maintained by our Hypothalamus (an area in the brain). being awake on night time changes it's function, it changes our hormonal system balance and other things around our brain. this can easily cause things like depression amongst some people.

More discussions about shift
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References in periodicals archive ?
In patients with mediastinal shift on chest radiograph due to suspected lung hypoplasia, MDCT is a non-invasive and appropriate investigation aiding in the diagnosis of congenital pulmonary venolobar syndrome and possible associated cardiac defects.
By postoperative day 9, the left side had become hyperinflated, which resulted in a right mediastinal shift (figure 1).
Konertz, "Pulmonary agenesis in a newborn: implantation of tissue expander to prevent a mediastinal shift," Thoracic and Cardiovascular Surgeon, vol.
Chest radiograph showed a massive gastrothorax on the left side with mediastinal shift to the right side and complete collapse of the left lung (Fig.
(33) Rare tumors that continue to enlarge often produce symptoms resulting from mass effect on surrounding structures, which may cause lung collapse and mediastinal shift. Commonly reported symptoms include dypnea, dysphagia, cough, orthopnea, chest pain, or arrhythmia.
Signs of tension pneumothorax and mediastinal shift, including respiratory distress, tracheal deviation, and dyspnea, should also be noted and the physician notified if any of them are present.
Chest radiograph (A) shows near complete white-out of right hemithorax causing mediastinal shift and leftward tracheal deviation.Sagittal CT images (B and C) show a huge approximately 16 x 16 x 12 cm mediastinal mass occupying the entire right hemithorax with mass effect, encasing all major vessels leading to severe compression of superior vena cava and bilateral brachiocephalic veins.
A 50-year-male patient with persistent air leakage on bronchopleural fistula on right side of chest since 3 months suffering with right chest pain, cough, sob with decreased air entry on right side with decreased respiratory movements, right mediastinal shift. Type 2 diabetes mellitus under control with insulin.
A chest X-ray revealed pneumoperitoneum, raised left diaphragm and right-sided mediastinal shift (Fig.
There is also widening of the rib spaces, flattening of the ipsilateral diaphragm, and a mediastinal shift to the contralateral side.
Extraskeletal Ewing's sarcoma presenting with multifocal intrathoracic mass lesions associated with Mediastinal Shift. Ann Thorac Surg.
Chest X-Ray revealed increased lucency over the left hemithorax with visible lung markings and fluid level, suggestive of a large cystic structure, along with mediastinal shift to the right.