By A. Asam. Schiller International University.
Glucosamine: A major component of joint cartilage that provides building blocks for growth dapoxetine 30mg amex impotence liver disease, repair purchase dapoxetine 30 mg with visa impotence gel, and maintenance of cartilage; helps cartilage absorb water; and keeps joints lubricated. It is well tolerated; however, it may thin the blood, so use cautiously along with blood-thinning medications. Curcumin: An antioxidant that has been shown in studies to have anti-inﬂammatory effects comparable to cortisone. Essential fatty acids: Both the omega-3s (ﬁsh oil) and omega-6s (borage, primrose oil) help to reduce the pain and inﬂammation and lubricate the joints. Minimize red meat, dairy, sugar, and reﬁned/processed foods; avoid nightshade foods. Do light strength training and cardiovascular and stretching activities regularly to improve joint function and mobility and to reduce pain. Bone is living tissue that consists of a matrix of protein ﬁbres (collagen), hard- ened with calcium, phosphorus, magnesium, zinc, copper, and other minerals. An interconnecting structure gives bone its strength: on the outside there is a tough, O dense rind of cortical bone, and on the inside there is spongy-looking trabecular bone. Bone cells called osteoclasts are constantly breaking down old bone at the same time that other cells, called osteoblasts, are building new bone. The activity of these cells is regulated primarily by the hormones estrogen, testosterone, and parathyroid hormone. Until about age 24, there is a balance in activity of osteoclasts and osteoblasts. After that point, bone loss begins, and as we age more bone is broken down than is replaced. In women, the rate of loss accelerates for several years after menopause, and then slows again. The trabecular bone normally looks like a honeycomb, but in those with osteopo- rosis the spaces in that honeycomb grow larger because more bone is destroyed than replaced. There are many factors that contribute to and accelerate bone loss, and much that can be done to prevent this disease. Since bone health affects our mobility and ability to carry out daily activities, it is important to learn how to prevent osteoporosis and maintain strong, healthy bones throughout life. Once the bones have become weakened, osteoporosis may cause back pain, collapsed vertebrae, loss of height, and spinal deformities. For those with osteoporosis or osteopenia with strong risk factors for osteoporosis, drug therapy may be recommended to either slow the rate of bone loss or promote bone development. There are a variety of medications that doctors prescribe, such as hormones and bisphosphonates (such as etidronate). Examples include canned ﬁsh with bones (salmon and sardines), dark-green vegetables (kale, kelp, collards, broccoli, and Brussels sprouts), and calcium-fortiﬁed orange juice and soy milk. Some studies have shown that people who get their calcium from plant sources have lower rates of osteoporosis. Many people have difﬁculty digesting lactose, the sugar in milk, and some are allergic to the protein in milk. Another concern is that dairy cows can be injected with hormones and antibiotics, which pass into their milk. Those who can tolerate milk should choose fat-free, organic milk and cheese to avoid ingestion of these substances. Recent research suggests that polyphenols (plant pigments) in fruits, vegetables, green tea, and red wine have a positive effect on bone-building cells. Food sources include leafy green vegetables, whole grains, nuts, seeds, meat, milk, soybeans, tofu, legumes, and ﬁgs. Food sources include fortiﬁed milk products and breakfast cereals, fatty ﬁsh, and eggs. O • Soy foods such as tofu, soy milk, roasted soy beans, soy powders, and soy bars can also play a role in the prevention of osteoporosis. Soy contains isoﬂavones, which are plant- based estrogens that protect against bone loss. Foods to avoid: • Caffeine (more than three cups coffee per day) or sodium can increase calcium loss through urination, accelerating bone deterioration. Lifestyle Suggestions • Weight-bearing activities, which place stress on the bone, help to strengthen bones and improve bone density.
Since the identification of the genetic abnormality generic 60 mg dapoxetine visa erectile dysfunction surgical treatment options, trials of gene-replacement therapy have begun purchase dapoxetine 60 mg visa impotence diagnosis code. She wants to have a second course of antibiotics because an initial course of amoxicillin made no difference. She teaches games, and the cough is troublesome when going out to the playground and on jogging. She had her tonsils removed as a child and was said to have recurrent episodes of bronchitis between the ages of 3 and 6 years. Her parents are alive and well and she has two brothers, one of whom has hayfever. Her chest is clear and there are no abnormalities in the nose, pharynx, cardiovascular, respiratory or nervous systems. The mean daily variation in peak flow from the recordings is 36 L/min and the mean evening peak flow is 453 L/min, giving a mean diurnal variation of 8 per cent. There is a small diurnal variation in normals and a vari- ation of #15 per cent is diagnostic of asthma. The family history of an atopic condition (hayfever in a brother), and the triggering of the cough by exercise and going out in to the cold also sug- gest bronchial hyper-responsiveness typical of asthma. Patients with a chronic persistent cough of unexplained cause should have a chest X-ray. When the X-ray is clear the cough is likely to be produced by one of three main causes in non-smokers. Around half of such cases have asthma or will go on to develop asthma over the next few years. A small number of cases will be caused by otherwise unsuspected problems such as foreign bodies, bronchial ‘adenoma’, sarcoidosis or fibrosing alveolitis. In this patient the diagnosis of asthma was confirmed with an exercise test which was associated with a 25 per cent drop in peak flow after completion of 6 min vigorous exer- cise. Alternatives would have been another non-specific challenge such as methacholine or histamine, or a therapeutic trial of inhaled steroids. After the exercise test, an inhaled steroid was given and the cough settled after 1 week. The inhaled steroid was discontinued after 4 weeks and replaced by a $2-agonist to use before exercise. However, the cough recurred with more evident wheeze and shortness of breath, and treatment was changed back to an inhaled steroid with a $2-agonist as needed. If control was not established, the next step would be to check inhaler technique and treatment adherence and to consider adding a long-acting $2-agonist. In some cases, the persistent dry cough associated with asthma may require more vigorous treatment than this. Inhaled steroids for a month or more, or even a 2-week course of oral steroids may be needed to relieve the cough. The successful management of dry cough relies on establishing the correct diagnosis and treating it vigorously. Twenty-four hours previously she developed a continuous pain in the upper abdomen which has become progressively more severe. Her past medical history is notable for a duodenal ulcer which was successfully treated with Helicobacter eradication therapy 5 years earlier. She smokes 15 cigarettes a day, and shares a bottle of wine each evening with her husband. She is tender in the right upper quadrant and epigastrium, with guarding and rebound tenderness. Cholecystitis is most common in obese, middle-aged women, and classically is triggered by eating a fatty meal. Continued secretion by the gallbladder leads to increased pressure and inflammation of the gallbladder wall.
This chapter also describes some renal hormones (renin 90 mg dapoxetine otc erectile dysfunction devices diabetes, atrial natriuretic factor and insulin-like growth factor) and rhabdomylolysis purchase dapoxetine 30mg erectile dysfunction drugs india. Renal failure is failure of the kidneys to perform normal metabolic functions (see Table 32. Renal failure indicates widespread (about three-quarters) non-function of nephrons. Endstage renal failure occurs when 90 per cent of nephrons fail, leaving a relatively narrow margin between recoverable and terminal failure. As more patients survive primary patholo-gies, and the population becomes older, secondary renal failure is likely to increase. Provided chronic failure is prevented, recovery of renal tissue (unlike other major organs) is usually complete. Two easily measured metabolites (urea 60 kDa, creatinine 133 kDa) are useful markers of healthy renal function, but with critical illness become progressively unreliable (Stark 1998). Nitrogen balance is restored by hepatic metabolism of ammonia to urea, which is excreted renally. Glomerular filtration of urea is influenced by many factors, such as tubular reabsorption of urea, metabolic rate, diet and drugs. Creatinine, a waste product of muscle metabolism, varies with muscle mass; those with less muscle (children, older adults) usually produce less creatinine. In health, creatinine clearance reflects glomerular filtration rate, normal serum levels being 50–120 micromol/l. As creatinine clearance is highest in the afternoon (Sladen 1994), accurate measurement necessitates 24-hour urine collections. Prerenal failure Prerenal failure occurs where renal hypoperfusion causes failure of renal function. Children are especially prone to hypovolaemia from diarrhoea and vomiting (Stewart & Barnett 1997). Since prerenal failure is caused by hypovolaemia rather than tubular damage, urinary sedimentation remains normal (Joynes 1996). As aldosterone increases renal reabsorption of sodium and water, urinary sodium can fall below 20 mmol/l (McHugh 1997), while urine osmolality rises (Joynes 1996). Intensive care nursing 314 In proportion to tissue weight, renal blood flow normally exceeds all other tissues except the carotid body (Ervine & Milroy 1997); however, renal tissue is especially susceptible to ischaemia. Damage to tubular epithelium from ischaemia causes cell dysfunction, allowing diffusion of filtered solute into interstitial tissue (Ervine & Milroy 1997). Intratubular accumulation of cellular debris further impairs tubular flow (Ervine & Milroy 1997), accelerating progression to intrarenal failure. Damage from nephrotoxicity is usually confined to epithelial layers; the epithelium readily regenerates, making recovery rapid (Carlson 1995). Ischaemia or inflammation damages deeper tissue; if basement membrane damage occurs, regeneration is unlikely, leading to chronic renal failure (Carlson 1995). Acute tubular necrosis used to be attributed to death of renal tubule cells, but pathology is more complex: while the problem is ‘acute’ and affects tubules, it is caused by ischaemia, rather than (necessarily) necrosis, of tubular cells. Hypoxia disrupts cell membranes (see Chapter 23) causing intracellular oedema and releasing vasoactive chemicals. Preglomerular vasoconstriction reduces glomerular perfusion, and so glomerular filtration. Widespread tubule intracellular oedema causes physical compression of lumens, obstructing flow of any filtrate produced. Medullary damage from intrarenal failure reduces sodium reabsorption in the Loop of Henle, so that urinary sodium levels are high (above 40 mmol/litre (McHugh 1997)). Hypernatraemia in the macula densa activates the renin-angiotensin-aldosterone cascade, further reducing glomerular blood flow and filtration. Intratubular sedimentation from cells rapidly obstructs flow, and the resulting retrograde pressure impedes filtration and can cause nephritis. Tubular cells readily regenerate so that renal replacement therapy buys time until recovery. However, as with other body tissue, reperfusion injury (see Chapter 23) from calcium and oxygen radicals can reverse recovery. Glomerulonephritis, inflammation of glomerular basement membrane, causes increased glomerular permeability.
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