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Venlor By C. Tukash. Nazarene Bible College. Similarly venlor 75mg on line, if the test or treatment is very expensive generic 75mg venlor amex, the level of proof of benefit of the screeing test must be greater. During the 1950s the executive physical examination was used to screen for “all” diseases in corporate executives and other, mostly wealthy, people. It was a comprehensive set of diagnostic tests including multiple x-rays, blood tests, exercise stress tests, and others, usually administered while the patient spent a week in the hospital. It was justified by the thought that finding disease early was good and would lead to improved length and quality of life. The more dis- eases looked for, the more likely that disease would be found at an earlier phase in its course and treatment at this early stage would lead to better health out- comes. Subsequent analysis of the data from these extensive examination pro- grams revealed no change in health outcomes as a result of these examinations. There were more people incorrectly labeled with diseases that they didn’t have than there were diseases detected early enough to reduce mortality or morbidity. Ironically, most of the diseases that were identified in these programs could have been detected simply from a comprehensive history. In this case most of the positive tests are false positives and the further testing that is required to determine wether the test is a false or true positive usually requires invasive testing such as operative biopsy. Finally, 312 Essential Evidence-Based Medicine Table 28. Criteria for a valid screening test (1) Burden of suffering The disease must be relatively common. Criteria for screening There are five criteria that must be fulfilled before a test should be used as a screening test. Following these rules will prevent the abuses of screening tests that occurred in the 1950s and 1960s and which continue today. The disease must impose a significant burden of suffering on the population to be screened. This means either that the disease is common or that it results in serious or catastrophic disability. This disability may result in loss of productive employment, patient discomfort or dissatisfaction, as well as passing the disease on to others. It also means that it will cost someone a lot of money to care for persons with the disease. The hope is to reduce this cost both in human suffer- ing and in dollars by treating at an earlier stage of disease and preventing com- plications or early death. This depends on well-designed studies of harm or risk to tell which diseases are likely to be encountered in a significant portion of the population in order to decide that screening for them is needed. For example, it would be unreasonable to screen the population of all 20-year- old women for breast cancer with yearly mammography. The risk of disease is Screening tests 313 so low in this population that even a miniscule risk of increased cancer asso- ciated with the radiation from the examination may cause more cancers than the test would detect. Similarly, the prevalence of cancer in this population is so low that the likelihood a positive test would be cancer is very low and there will be many more false positives than true positives. The screening test must be a good one and must accurately detect disease in the population of people who are in the presymptomatic phase of disease. It should also reliably exclude disease in the population without disease or have high specificity. Of the two, we want the sensitivity to be perfect or almost perfect so that we can identify all patients with the disease. We’d like the specificity to be extremely high so that only a few peo- ple without disease are mislabeled leading to a high positive predictive value. This usually means that a reasonable confirmatory test must be available that will more accurately discriminate between those people with a positive screen- ing test who do and don’t have the disease. It should be relatively comfortable, not very painful, should not cause serious side effects, and also be reasonably priced. A screening test may be unacceptable if it produces too many false positives since those people will be falsely labeled as having the disease, a circumstance which could lead to psychological trauma, anxiety, insurance or employment discrimination, or social conflicts. Several studies have found significant increases in anxiety that interferes with life activities in persons who were falsely labeled as having disease on a screening test. A pilot study of early diagnosis in Malaysia engaged community nurses to hold health educational talks purchase 75mg venlor overnight delivery. Facilitate access to primary care Health education and community mobilization can ensure populations engage with the health sector venlor 75mg generic. Addressing determinants of health and obstacles to primary care 24 | Guide to cancer early diaGnosis can have additional benefcial effects in reducing cancer delays, improving equity, increasing adherence to diagnosis and treatment and improving overall health par- ticipation (35). Public awareness about cancer should not only include symptom awareness but also counselling on how and where to present for care, with consider- ation for facility capacity, accessibility and direct and indirect costs. Step 2: Clinical evaluation, diagnosis and staging Improve provider capacity at frst contact point The primary care level has an important role in cancer control that includes education and health literacy in cancer prevention, early identifcation of cancer, diagnostic tests, counselling and care after diagnosis and follow-up care after treatment, including palli- ative and supportive care (19). Additional cancer-related interven- tions include: (i) counselling on risk reduction such as behavioural modifcation (e. Improving capacity at the primary care level or frst contact point in the health system can result in more effective and timely cancer diagnosis (Table 4). Providers should receive appropriate knowledge and clinical assessment skills through pre-service education and continuing professional development. Guide to cancer early diaGnosis | 25 Table 4. Sample interventions to improve early diagnosis capacity at the primary care level Building capacity in primary care Impact develop protocols for clinical assessment (e. Factors that enable primary care providers to diagnose cancer include allowing suffcient time to assess individual patients, ensuring availability of diagnostic tools (e. Care protocols should be developed and utilized to avoid unnecessary health expen- ditures such as expensive diagnostic or staging studies for localized cancer. Strengthen diagnostic and pathology services Basic cancer diagnostic tests such as ultrasound, X-ray, cytology and biopsy capabil- ity should be available at the secondary care level, and also available at the primary care level where resources permit, to successfully implement cancer early diagnosis programmes (44). Diagnostic algorithms should be developed according to available resources and provider capacity and coordinated between facilities. Quality assurance mecha- nisms should also be developed to ensure that diagnostic and pathology services are accurate, that the appropriate standards are employed and that results are commu- nicated in a timely manner. Develop referral mechanisms and integrated care The health system architecture required to provide core cancer services varies by setting and cancer type. In some regions and for certain cancers, clinical and patho- logic diagnosis can be provided during an initial clinic visit. Other settings and some cancer types require multiple referrals to complete cancer diagnosis, staging and ini- tiate treatment. The overall goal is to minimize delays in care and provide integrated, 26 | Guide to cancer early diaGnosis people-centred care through: (i) coordinated, effcient referral systems that facilitate access, improve communication and reduce unnecessary visits; (ii) linking primary care and outpatient specialty care to advanced diagnostic and treatment services; and (iii) effective communication between patients, families and providers, encour- aging patient participation and shared decision making. The types of services provided at the secondary and tertiary care levels depend on health system organization (Figure 9). The package of services in various facilities should be documented and known to health planners and providers to enable timely referral and prompt diagnosis. Referral and counter-referral guidelines should be established to deliver time-sensitive services without fragmentation or duplication and be readily available at all levels, developed according to provider and facility capacity. A direct link should be developed between primary care facilities and higher levels of care by establishing criteria for referral and counter-referral and improving infor- mation transfer between providers (e. A medical records system should be available at all levels of care, allowing providers to properly document diagnostic and staging information, management plans and status at each follow-up visit (45). Interventions can be designed to improve coor- dination between providers and patients, such as tumour boards, multi-disciplinary review or an integrated electronic medical record system. Sample organization of cancer interventions by care level Community engagement Primary care level Secondary care level Tertiary care level and empowerment Key functions Diagnosis Diagnosis Diagnosis • cancer awareness • recognition of cancer signs • cytology, biopsy, routine • cytology, biopsy, histopa- • community leaders and symptoms histopathology thology, prognostic markers, and cancer advocates • appropriate clinical • X-ray, ultrasound, endoscopy immunochemistry engagement evaluation Treatment • X-ray, ultrasound, endoscopy, • addressing cancer stigma • early referral of suspicious • Moderately complex surgery computerized tomography • Facilitating health-seeking cases • outpatient chemotherapy Treatment behaviour Treatment • radiotherapy • identifcation of barriers to Additional functions • Basic procedures (e. Guide to cancer early diaGnosis | 27 and fragmentation of care, when possible, all staging should be done at the facility with the requisite staging and treatment capacity. Routine post-treatment follow-up after discharge from a higher level of care may be available at the primary care level (such as suture removal). Include the thumbs discount venlor 75mg visa, fnger tips discount venlor 75 mg with amex, palms and in between the fngers, rubbing backwards and forwards at every stroke (see Posters on hand washing technique in the Appendices). Drying • Good quality disposable paper towels (preferably wall mounted) should be available at or near the wash hand basins for drying hands. Alcohol based hand rubs/gels Alcohol based hand rubs/gels are not a substitute for hand washing with soap and running water and are not generally recommended for routine use in educational settings because of concerns over safety, and the fact that the rubs/gels are not effective when used on hands that are visibly dirty (a common feature among school children). Alcohol-based hand rubs and gels are a good alternative when soap and running water are not available, (e. Method • Apply the required volume of the product to the palm of one hand and rub the hands together. The amount of gel used should be enough to keep the hands wet for at least 15 seconds. Health and Safety As with any other household product or chemical, alcohol hand rubs can be hazardous if used inappropriately. If alcohol hand rubs/gels are used in the school setting, care should be taken to ensure that children do not accidentally ingest hand washing products. Hand washing and young children Good hand washing habits should be taught to young pupils as early as possible. This can be done by: • Showing children a good hand washing technique (See posters on hand washing in Appendices). Gloves Disposable gloves should be worn when dealing with blood, body fuids, broken or grazed skin, and contact with mucous membranes (e. Medical/examination gloves • Disposable, powder free gloves made of either natural rubber latex or nitrile are suitable for use in these circumstances as they have good barrier properties. Medical/examination gloves are recommended for: • Dealing with nosebleeds or cuts. Household gloves are suitable for: • Cleaning and disinfecting bathrooms or any areas contaminated with faeces, vomit or urine. General points • Single use gloves should be discarded after each use or if punctured, torn or heavily contaminated. Personal hygiene Items that may be contaminated with blood or body fuids should not be shared including: • Towels, fannels and toothbrushes. Suitable bins should be provided for female staff and pupils to dispose of sanitary protection. Respiratory hygiene and cough etiquette Respiratory hygiene and cough etiquette are effective ways to reduce the spread of germs when coughing and sneezing. In addition: • Older children should be encouraged to keep a box of disposable paper tissues in their schoolbags for use as needed. For younger children, or where this is impractical, a plentiful supply of disposable paper tissues should be available in classrooms especially during the ‘fu season’. Preventing blood and body fuid exposures It is important to avoid unnecessary direct contact with blood or bodily fuids. However, should blood come in contact with intact and undamaged skin there is no risk of transmission of blood borne viruses, e. If blood splashes into the eye or mouth, it is important to rinse with lots of water. Part 2 of Guidelines on Managing Safety and Health - Post Primary contains recommendations on the contents of frst–aid boxes and kits (Page 86), and frst-aid training requirements and number of occupational frst-aiders required (Page 228). General points • Cuts, abrasions or sores should be covered with a waterproof dressing. It is not unusual for children to cough or vomit swallowed blood after they have had a severe nose bleed. Intact skin provides a good barrier to infection, and staff should always wear waterproof dressings on any fresh cuts or abrasions on their hands. Staff should always wash their hands after dealing with other people’s blood even if they have worn gloves or they cannot see any blood on their hands. Dealing with bites Human mouths carry a wide variety of germs, some of which can be transmitted to others by bites. Antiphospholipid syndrome Definition A disorder characterised by the presence of autoantibod- Systemic sclerosis and scleroderma ies directed against phospholipids or plasma proteins bound to phospholipids order venlor 75 mg with mastercard. Definition Sclerosis (hardening due to excessive production of con- nective tissue) of collagen affecting the skin (sclero- Aetiology/pathophysiology derma) and the internal organs (systemic sclerosis) discount venlor 75 mg with amex. The condition causes a thrombotic ten- Incidence dency due to loss of phospholipid dependent coagula- Rare, 3 per million. Pro-thrombotic stimuli such as preg- nancy, surgery, cigarette smoking, hypertension and Age the use of oral contraceptives further exacerbate this Anyage, mean onset at 40 years. Antibodies include the lupus anti-coagulant (anti-coagulant in vitro but procoagulant in vivo), anti β2glycoprotein-I antibodies and anticardiolipin Sex antibodies. A scleroderma like disor- eration and thickening of the intima and fibrosis of the der is seen following exposure to silica, vinyl chlo- adventitia is seen. Morphoea are patches of sclerotic skin on the trunk r Raynaud’s phenomenon is treated by avoiding cold, andlimbs,whichmaybelocalisedormoregeneralised. Malabsorp- r Limited cutaneous systemic sclerosis begins with tion may require changes in diet. Notreatmenthasbeenshowntoalter r Overlap syndromes have combinations of the features the long-term progression of scleroderma. Diffuse dis- of systemic sclerosis, systemic lupus erythematosus, ease with severe visceral involvement carries the worst dermatomyositis or rheumatoid arthritis. Chapter 8: Connective tissue disorders 369 Nervous system: Cardiovascular system: Ischaemic changes in central and Pericarditis, myocardial fibrosis peripheral nervous system. Peripheral causing a restrictive cardiomyopathy, neuropathy may occur due to conduction tissue fibrosis causes perineural vascular sclerosis. Respiratory system: Pulmonary fibrosis especially in lower Gastrointestinal system: lobes and pulmonary hypertension. Motility disorders including gastro- oesophageal reflux with oesophagitis, ulceration and aspiration pneumonia, malabsorption secondary to bacterial Genitourinary system: overgrowth. Sjogren’s¨ syndrome Pathophysiology There is lymphocytic infiltration of salivary glands and Definition other exocrine glands in the respiratory and gastroin- Achronic inflammatory disorder of the lacrimal and testinal tract, the skin and the vagina. Sex 9F : 1M Clinical features Aetiology r Ocular manifestations: Sensation of persistent grit- Sjogren’s¨ syndrome may be primary, or secondary to tiness, photosensitivity, tiredness and an inability to rheumatoid arthritis, systemic lupus erythematosus, produce tears (keratoconjunctivitis sicca). There is r Gastrointestinal system: Lack of saliva (xerostomia) an association with non-Hogkin B cell lymphoma. There 370 Chapter 8: Musculoskeletal system may be oral ulcers, dental caries and firm non-tender age of 40 years. The skin shows collagenous thicken- phenomenon and an association with other organ ing of the dermis with chronic inflammatory cell infil- specific autoimmune disorders in primary Sjogren’s¨ trates. Occasionally there are systemic features including vasculitis and renal tubu- Clinical features lar defects. Gradual onset of non-specific systemic features followed by symmetrical, progressive, proximal muscle weakness. Occasionally there is cardiac r Schirmer’s test for keratoconjunctivitis sicca measures involvement leading to heart failure, respiratory involve- tear production. An edge of a strip of filter paper is ment, including nonspecific interstitial pneumonia, and placed in the lower eyelid and the length that becomes oesophageal involvement, which may be sufficiently se- wetismeasured. Management Sex Acute phases are treated with corticosteroids, which 2F: 1M should be reduced gradually to a low-maintenance dose. Methotrexate, azathioprine or cyclophosphamide are Aetiology/pathophysiology used in resistant cases. Dermatomyositis is associated with malignancy of variable severity, and spontaneous remissions can (e. Chapter 8: Crystal arthropathies 371 Marfan’s syndrome Management r β-blockers have been shown to slow aortic dilata- Definition tion, and lifelong therapy is recommended by the Inherited condition resulting in abnormalities of con- European Society of Cardiology. The under- r Musculokeletal: Patients have elongated and asym- lyingpathologyisanabnormalityinskin,jointandblood metrical faces with a high arched palate. Some of the reduced upper to lower body segment ratio and an subtypes have been mapped to mutations in the collagen arm span that exceeds the patient’s height. Clinical features r Cardiovascular system: There is degeneration of the There is hyperextensible skin with normal elastic recoil, media of blood vessel walls: hypermobile joints, and fragility of blood vessels causing 1 Dilation of the aortic valve ring producing regurgi- bruising and occasionally aortic dissection and rupture. Hypermobility can lead to early osteoarthritic changes 2 Mitral valve prolapse and associated mitral valve and damage to the joints. The diagnosis is clinical and can be based on clinical cri- r Calcium pyrophosphate causes pseudogout. Venlor
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