a LANGE medical book. CURRENT. Medical Diagnosis. & Treatment New table summarizing Revised Jones Criteria for rheumatic fever. CURRENT Medical Diagnosis and Treatment Study Guide, 2E (Lange Current): Publisher: McGraw-Hill Education / Medical; 2 edition (December 7, ). placeholder for MarKeTING paGe dancindonna.info 1 7/29/14 PM This page intentionally left blank CURRENT Medical Diagnosis.
|Language:||English, Spanish, French|
|Genre:||Business & Career|
|ePub File Size:||21.67 MB|
|PDF File Size:||18.11 MB|
|Distribution:||Free* [*Register to download]|
Current Medical Diagnosis & Treatment (CMDT ) is the 54th edition of this dancindonna.info CURRENT Medical Diagnosis & Treatment 1, Pages·· CURRENT Medical Diagnosis and Treatment 1, Pages·· placeholder for MARKETING PAGE dancindonna.info 1 7/29/14 PM This page intentionally left blank a LANGE medical book CURRENT.
Open in a separate window As every year population sizes increase, new diseases are discovered and scientists make new drugs, there is a need for an updated and concise clinical text book for medical practitioners. The Current Medical Diagnosis and Treatment CMDT authors did a very good job of this by writing a text book which can be updated annually, with a quick reference link to an online preview. This 48th edition has outstanding features which make the book easier to use. This text book in internal medicine is trusted, authoritative, and essential to daily practice. It delivers the latest insights into signs, symptoms, epidemiology, etiology, and treatment for over 1, diseases and disorders.
Regulation of water intake and homeostasis As the serum sodium concentration is determined by the amount of extracellular water relative to the amount of sodium, it can be regulated by changing intake or output of water. The major mechanisms responsible for regulating water metabolism are thirst and the pituitary secretion and renal effects of vasopressin.
Regulation of body water serves to minimise osmotically induced disruptions in cell volume with adverse effects on multiple cellular functions. Osmoreceptive neurons located in the anterior hypothalamus detect changes in cell stretch due to changes in systemic effective osmolality.
A decrease in cell stretch increases the firing rate of osmoreceptive neurons, which leads to both increased thirst and increased release of vasopressin from the pituitary gland. Vasopressin in turn increases the re-absorption of water from the primitive urine in the distal tubules of the nephron, which leads to urine that is more concentrated. To prevent persistent thirst, the threshold for releasing vasopressin is lower than that for triggering thirst Fig.
Download figure as PowerPoint slide Figure 3 Osmotic stimulation of vasopressin release.
Schematic representation of normal physiological relationships among plasma osmolality, plasma AVP concentrations, urine osmolality and urine volume in man. Note particularly the inverse nature of the relationship between urine osmolality and urine volume, resulting in disproportionate effects of small changes in plasma AVP concentrations on urine volume at lower AVP levels. Disorders of body water homeostasis. Osmoregulation and vasopressin release Under normal circumstances, osmotic regulation of the release of vasopressin from the posterior pituitary primarily depends on the effective osmolality of the serum.
Central osmoreceptors, expressing transient receptor potential vanilloid 1 TRPV1 , and peripheral osmoreceptors, expressing TRPV4, relay the information on osmolality 20 , The stretch-inactivating cationic TRPV1 and TRPV4 channels transduce osmotically evoked changes in cell volume into functionally relevant changes in membrane potential. TRPV1 is an osmotically activated channel expressed in the vasopressin producing magnocellular cells and in the circumventricular organs 22 , Recently, afferent neurons expressing the osmotically activated ion channel TRPV4 able to detect physiological hypo-osmotic shifts in blood osmolality have been identified in the thoracic dorsal root ganglia, which innervate hepatic blood vessels Baroregulation of vasopressin release Stretch-sensitive receptors in the left atrium, carotid sinus and aortic arch sense circulating volume.
When the circulating volume is increased, afferent neural impulses inhibit the secretion of vasopressin Conversely, when the volume is decreased, the discharge rate of the stretch receptors slows and vasopressin secretion increases In addition, there seems to be an exponential association between the serum vasopressin concentration and the percentage decline in mean arterial blood pressure, with faster increases as blood pressure progressively decreases.
Because osmoregulated and baroregulated vasopressin secretion are interdependent, renal water excretion can be maintained around a lower set point of osmolality under conditions of moderately decreased circulating volume As the circulatory hypovolaemia worsens, the serum vasopressin concentration dramatically increases and baroregulation overrides the osmoregulatory system.
Osmosensitive neurons are located in the subfornical organ and the organum vasculosum of the lamina terminalis. Because these neurons lie outside the blood—brain barrier, they integrate osmotic information with endocrine signals borne by circulating hormones, such as angiotensin II and atrial natriuretic peptide.
Modifications in osmoregulatory gain induced by angiotensin, together with changes in vasopressin secretion induced by baroregulation see below , may explain why the changes in the slope and threshold of the relationship between serum osmolality and vasopressin secretion are potentiated by hypovolaemia or hypotension and are attenuated by hypervolaemia or hypertension Fig.
Download figure as PowerPoint slide Figure 4 Effects of hypovolaemia on osmoreceptor gain. The interaction of blood osmolality and blood volume in regulating plasma vasopressin in man. Journal of Clinical Endocrinology and Metabolism 42 — Unregulated vasopressin release The posterior pituitary is the only organ in which regulated vasopressin release takes place.
Under pathological conditions, both pituitary and other cells may also synthesise and secrete vasopressin independent of serum osmolality or circulating volume.
We now know that both genetic and pharmacological factors can also increase water permeability in the collecting duct in the absence of vasopressin. Others have previously introduced the term syndrome of inappropriate antidiuresis SIAD to cover both situations.
We will use it throughout this text. Renal actions of vasopressin In order to re-absorb water from the collecting duct, and to concentrate the urine, the collecting duct must become permeable to water. The basolateral membrane is always permeable to water because of aquaporin-3 and aquaporin-4 water channels.
Vasopressin regulates the permeability of the apical membrane by insertion of aquaporin-2 water channels through vasopressinreceptor activation.
The high osmolality of the medulla provides the driving force needed for re-absorption of water from the collecting duct. Thanks to the counter current configuration of the loops of Henle, the kidney is able to create solute gradients from the cortex to the inner medulla.
This streamlined clinical companion is the fastest and easiest way to keep abreast of the latest diagnostic advances, prevention strategies, and cost-effective treatments.
Strong emphasis on the practical aspects of clinical diagnosis and patient management throughout the broad fields of internal medicine Full review of internal medicine and primary care topics, including gynecology and obstetrics, dermatology, neurology, ophthalmology, geriatrics, and palliative care The only text with an annual review of advances in HIV treatment Specific disease prevention information Hundreds of medication treatment tables, with indexed trade names and updated prices — plus helpful diagnostic and treatment algorithms Recent references with PMID numbers Many full-color photographs and illustrations.
Update on the evaluation of chest pain New algorithms for the treatment of heart failure and NSTEMI New sections on pulmonary hypertension; treatment of pleural mesothelioma; diagnosis and treatment of subacute, postpartum, and silent thyroiditis and amiodarone- and iodine-induced thyrotoxicosis; and treatment of cryoglobulinemic vasculitis New tables on preferred initial antiretroviral regimen and fixed dose antiretroviral combinations for HIV infection, and on medications for management of diabetes Updated tables on cancer chemotherapeutic and supportive care agents.
Jump to. Sections of this page. Accessibility Help. Email or Phone Password Forgot account? Info and Ads.
Log In. Forgot account?
Not Now. Visitor Posts. Hussaini Julde. Updated topics in this edition include topics in epidemiology, aetiology, and diagnosis and treatment recommendations; sections on asthma includes NAEPP guidelines and palpitations; more algorithms are provided throughout and there is increased coverage of Canadian and International Guidelines. The chapter on haemostasis and antithrombotic therapy has been improved.
Colour inserts have been expanded to 16 pages with the latest developments in HIV infection, including new drugs, recommended treatment regimens, and antiretroviral drug resistance.
Alternative medicine and complementary therapies are represented with sections on mind-body medicine; clinical hypnosis; biofeedback; mindfulness meditation; stress reduction and cognitive therapy and guided imagery.
CMDT Online is updated quarterly www.
Recent references are also provided, with unique identifiers PubMed, PMID numbers for rapid downloading of article abstracts and, in some instances, full-text reference articles.
As with any book there are a few points that need to be taken into consideration for future improvement. The cardiology chapter needs ECG and echocardiography pictures.