vaso-occlusive crisis

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Related to vaso-occlusive crisis: sickle-cell disease, acute chest syndrome, Sickle cell crisis


 [kri´sis] (pl. cri´ses) (L.)
1. the turning point of a disease for better or worse; especially a sudden change, usually for the better, in the course of an acute disease.
2. a sudden paroxysmal intensification of symptoms in the course of a disease.
addisonian crisis (adrenal crisis) the symptoms accompanying an acute onset or worsening of addison's disease: anorexia, vomiting, abdominal pain, apathy, confusion, extreme weakness, and hypotension; if untreated these progress to shock and then death.
aplastic crisis a sickle cell crisis in which there is temporary bone marrow aplasia.
blast crisis a sudden, severe change in the course of chronic granulocytic leukemia, characterized by an increased number of blasts, i.e., myeloblasts or lymphoblasts.
catathymic crisis an isolated, nonrepetitive act of violence that develops as a result of intolerable tension.
celiac crisis an attack of severe watery diarrhea and vomiting producing dehydration and acidosis, sometimes occurring in infants with celiac disease.
developmental crisis maturational crisis.
hemolytic crisis an uncommon sickle cell crisis in which there is acute red blood cell destruction with jaundice.
hypertensive crisis dangerously high blood pressure of acute onset.
identity crisis a period in the psychosocial development of an individual, usually occurring during adolescence, manifested by a loss of the sense of the sameness and historical continuity of one's self, confusion over values, or an inability to accept the role the individual perceives as being expected by society.
life crisis a period of disorganization that occurs when a person meets an obstacle to an important life goal, such as the sudden death of a family member, a difficult family conflict, an incident of domestic violence (spouse or child abuse), a serious accident, loss of a limb, loss of a job, or rape or attempted rape.
maturational crisis a life crisis in which usual coping mechanisms are inadequate in dealing with a stress common to a particular stage in the life cycle or with stress caused by a transition from one stage to another. Called also developmental crisis.
myasthenic crisis the sudden development of dyspnea requiring respiratory support in myasthenia gravis; the crisis is usually transient, lasting several days, and accompanied by fever.
oculogyric crisis a symptom of an acute dystonic reaction in which the person demonstrates a fixed gaze, usually upward; also, the uncontrollable rolling upwards of the eye. It can be a result of encephalitis or a reaction to antipsychotic medications.
salt-losing crisis see salt-losing crisis.
sickle cell crisis see sickle cell crisis.
tabetic crisis a painful paroxysm occurring in tabes dorsalis.
thyroid crisis (thyrotoxic crisis) see thyroid crisis.
vaso-occlusive crisis a sickle cell crisis in which there is severe pain due to infarctions in the bones, joints, lungs, liver, spleen, kidney, eye, or central nervous system.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

vaso-occlusive crisis

Painful crisis Hematology A 'crisis' common in sickle cell anemia, in which 'sludged' sickled RBCs cause capillary stasis and infarction, and incapacitating musculoskeletal pain or 'referral'-type organ pain, hemoptysis, hematuria, melena, CNS Sx; VOCs occur at a rate of 0.8 episodes/yr in sickle cell disease, 1.0/yr in sickle-β-thalassemia, and 0.4/yr in HbSC-β thalassemia; this frequency is translated into a 'pain rate', a measure of disease severity that correlates with early death in Ps with sickling anemias Management High-dose methylprednisolone ↓ duration of painful crises; rebound attacks ↑ with discontinuation of steroids. See Hemolytic crisis, Sickle cell anemia.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

vaso-occlusive crisis (in sickle cell disease)

Painful occlusions of blood vessels in bones, the chest, the lungs, or the abdomen in patients with sickle cell anemia. The syndrome is caused by sickling of blood cells in small blood vessels, with resulting infarction and tissue death. Synonym: sickle cell crisis
See also: crisis
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
This study set out to evaluate the effectiveness of virtual reality in children experiencing vaso-occlusive crisis from sickle cell disease.
Frequency of Vaso-occlusive Crisis (Average Number of Episodes per Year) Frequency of VOC (Average Number Number of Cases of Episodes Per Year) (n=120) No VOC 10 (08.33%) < 1VOC (Range 0.3-1) 56 (46.67%) >1 VOC (Range 1.2-3) 54 (45%) Total 120 (100%) Table 4.
* The common mode of presentation/complication for Thalassemia major was anaemia with congestive cardiac failure; vaso-occlusive crisis for sickle cell anaemia and anaemia for sickle cell disease.
Use of ketorolac in sickle cell disease and vaso-occlusive crisis [letter].
GlycoMimetics' most advanced drug candidate, rivipansel, a pan-selectin antagonist, is currently being developed for the treatment of vaso-occlusive crisis in sickle cell disease in a Phase 3 trial being conducted by Pfizer Inc., the exclusive licensee of rivipansel for clinical development and worldwide commercialization.
In the company's EPIC study, which is a randomised, double-blind, two-arm, placebo-controlled, Phase 3 clinical trial of vepoloxamer in patients with sickle cell disease hospitalised for treatment of vaso-occlusive crisis, a total of 388 patients, ages four to 46 were enrolled.
Resultant pain crisis or vaso-occlusive crisis (VOC) is an intricate patho-physiological process, involving vaso-constriction, leucocyte adhesion & migration, platelet activation & adhesion, and coagulation.
Rivipansel is an investigational compound under evaluation by Pfizer as an intravenous formulation in a Phase 3 study for the treatment of individuals hospitalized with vaso-occlusive crisis of sickle cell disease, a genetic disease where the red blood cells of patients become sickle-shaped, inflexible and adhesive.
The company's most advanced drug candidate, rivipansel, a pan-selectin antagonist, is being developed for the treatment of vaso-occlusive crisis in sickle cell disease and is being evaluated in a Phase 3 clinical trial being conducted by its strategic collaborator, Pfizer.
Under the partnership, Pfizer dosed the first patient in the RESET (Rivipansel: Evaluating Safety, Efficacy and Time to Discharge) study, which is a Phase 3 clinical trial assessing the efficacy and safety of rivipansel for treating vaso-occlusive crisis (VOC) in patients hospitalised with sickle cell disease who are six years of age or older.
Biotechnology company GlycoMimetics Inc revealed on Friday the receipt of the European Medicines Agency's (EMA) orphan drug designation for GMI-1070 (rivipansel sodium) for the treatment of vaso-occlusive crisis (VOC) in patients with sickle cell disease.