Chapter 035 Hypoxia and Cyanosis (Part 3) ppt

... Chapter 035. Hypoxia and Cyanosis (Part 3) Adaptation to Hypoxia An important component of the respiratory response to hypoxia originates in special chemosensitive ... differentiation between central and peripheral cyanosis may not always be simple, and in florid skin characteristic of polycythemia vera (Chap. 1 03) must be distinguished from the true cyanos...

Ngày tải lên: 06/07/2014, 15:21

... only in part by an FI O2 of 100%. Chapter 035. Hypoxia and Cyanosis (Part 1) Harrison's Internal Medicine > Chapter 35. Hypoxia and Cyanosis HYPOXIA The fundamental task of the ... (Chap. 33), which intensifies hypoxia and can initiate a vicious circle. Rarely, high-altitude cerebral edema (HACE) develops. This is manifest by severe headache and...

Ngày tải lên: 06/07/2014, 15:21

... tissues, directly and/ or reflexly; (3) increasing O 2 extraction from the delivered blood and widening the arteriovenous O 2 difference; and (4) reducing the pH of the tissues and capillary blood, ... different from that in other types of hypoxia; the skin is warm and flushed owing to increased cutaneous blood flow that dissipates the excessive heat produced, and cyanosi...

Ngày tải lên: 06/07/2014, 15:21

... Generally, digital clubbing does not occur with them. Chapter 035. Hypoxia and Cyanosis (Part 4) Differential Diagnosis CENTRAL CYANOSIS (Table 35-1) Decreased Sa O2 results from a marked ... at rest, and shunting of this blood intensifies the cyanosis. Secondary polycythemia occurs frequently in patients with arterial O 2 unsaturation and contributes to the c...

Ngày tải lên: 06/07/2014, 15:21

... Chapter 035. Hypoxia and Cyanosis (Part 5) PERIPHERAL CYANOSIS Probably the most common cause of peripheral cyanosis is the normal vasoconstriction ... phenomenon, Chap. 2 43), generally results in pallor and coldness, and there may be associated cyanosis. Venous obstruction, as in thrombophlebitis, dilates the subpapillary venous plexuses and thereby ... blood...

Ngày tải lên: 06/07/2014, 15:21

... junction. Chapter 023. Weakness and Paralysis (Part 3) Lower Motor Neuron Weakness This pattern results from disorders of cell bodies of lower motor neurons in the brainstem motor nuclei and ... tone and attenuates the stretch reflexes elicited on examination. An absent stretch reflex suggests involvement of spindle afferent fibers. Figure 23-2 variable in degree and...

Ngày tải lên: 06/07/2014, 13:20

... 1990. History Chapter 026. Confusion and Delirium (Part 3) Approach to the Patient: Delirium As the diagnosis of delirium is clinical and made at the bedside, a careful history and physical ... autonomic instability, and changes in affect Table 26-1 The Confusion Assessment Method (CAM) Diagnostic Algorithm The diagnosis of delirium requires the presence of features 1...

Ngày tải lên: 06/07/2014, 13:20

... after menopause. Figure 50-2 Chapter 050. Hirsutism and Virilization (Part 3) Hormonal Evaluation Androgens are secreted by the ovaries and adrenal glands in response to their respective ... (LH) and adrenocorticotropic hormone (ACTH). The principal circulating steroids involved in the etiology of hirsutism are testosterone, androstenedione, and dehydroepiandrost...

Ngày tải lên: 06/07/2014, 20:20

... form crusts and heal. Chapter 053. Eczema and Dermatitis (Part 3) Lichen Simplex Chronicus Lichen simplex chronicus may represent the end stage of a variety of pruritic and eczematous ... Dyshidrotic eczema, a variant of hand eczema, presents with multiple, intensely pruritic, small papules and vesicles occurring on the thenar and hypothenar eminences and the sid...

Ngày tải lên: 06/07/2014, 20:20

... before the clinical utility of this approach can be fully realized. Chapter 080. Cancer Cell Biology and Angiogenesis (Part 3) Figure 80-1 ... (which binds and inhibits p 53) was deleted; this virus selectively replicates in tumor cells lacking p53 function. This virus has shown efficacy in phase II clinical trials of head and neck tumors, ... deleted and the ot...

Ngày tải lên: 07/07/2014, 01:20