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Cyanosis is the change of body tissue color to a bluish-purple hue, as a result of decrease in the amount of oxygen bound to the hemoglobin in the red blood cells of the capillary bed. [1] Cyanosis is apparent usually in the body tissues covered with thin skin , including the mucous membranes , lips, nail beds , and ear lobes. [ 1 ]
You can find various articles that are somewhat pertinent by googling the phrase "Mechanism of cyanosis". (rather than "cause of cyanosis, which leads to differential diagnoses). Since there are different causes of cyanosis working via different mechanisms, no explanation is going to be simple. - Nunh-huh 00:58, 11 February 2017 (UTC)
The last typically occurs through one of three mechanisms: The gas is directly released from canisters (e.g., as part of a pesticide, insecticide, or Zyklon B). It is generated on site by reacting potassium cyanide or sodium cyanide with sulfuric acid (e.g., in a modern American gas chamber).
The precise mechanism of acrocyanosis is not known. [6] The current line of thinking goes that vasospasms in the cutaneous arteries and arterioles produce cyanotic discoloration, while compensatory dilatation in the postcapillary venules causes sweating. Arteriovenous subpapillary plexus shunting also occurs.
Blue baby syndrome can refer to conditions that cause cyanosis, or blueness of the skin, in babies as a result of low oxygen levels in the blood. This term has traditionally been applied to cyanosis as a result of:. [1] Cyanotic heart disease, which is a category of congenital heart defect that results in low levels of oxygen in the blood. [2]
Histotoxic hypoxia (also called histoxic hypoxia) is the inability of cells to take up or use oxygen from the bloodstream, despite physiologically normal delivery of oxygen to such cells and tissues. [1]
Traumatic asphyxia is characterized by cyanosis in the upper extremities, neck, and head as well as petechiae in the conjunctiva. Patients can also display jugular venous distention and facial edema. [3] Associated injuries include pulmonary contusion, myocardial contusion, hemo/pneumothorax, and broken ribs. [4] [5]
Nail clubbing, also known as digital clubbing or clubbing, is a deformity of the finger or toe nails associated with a number of diseases, anomalies and defects, some congenital, mostly of the heart and lungs.