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Sedentary Work Exerting up to 10 pounds (4.5 kg) of force occasionally and/or a negligible amount of force frequently or constantly to lift, carry, push, pull, or otherwise move objects, including the human body. Sedentary work involves sitting most of the time, but may involve walking or standing for brief periods of time. Jobs are sedentary if walking and standing are required only occasionally and other sedentary criteria are met.

Light Work Exerting up to 20 pounds (9.1 kg) of force occasionally and/or up to 10 pounds (4.5 kg) of force frequently, and/or negligible amount of force constantly to move objects. Physical demand requirements are in excess of those for Sedentary Work. Light Work usually requires walking or standing to a significant degree. However, if the use of the arm and/or leg controls requires exertion of forces greater than that for Sedentary Work and the worker sits most the time, the job is rated Light Work.

Medium Work Exerting up to 50 (22.7 kg) pounds of force occasionally, and/or up to 25 pounds (11.3 kg) of force frequently, and/or up to 10 pounds (4.5 kg) of forces constantly to move objects.

Heavy Work Exerting up to 100 pounds (45.4 kg) of force occasionally, and/or up to 50 pounds (22.7 kg) of force frequently, and/or in excess of 20 pounds (9.1 kg) of force constantly to move objects.

Very Heavy Work Exerting in excess of 100 pounds (45.4 kg) of force occasionally, and/or in excess of 50 pounds (22.7 kg) of force frequently, and/or in excess of 20 pounds (9.1 kg) of force constantly to move objects.

Job Classification

In most duration tables, five job classifications are displayed. These job classifications are based on the amount of physical effort required to perform the work. The classifications correspond to the Strength Factor classifications described in the United States Department of Labor's Dictionary of Occupational Titles. The following definitions are quoted directly from that publication.

Sedentary Work Exerting up to 10 pounds (4.5 kg) of force occasionally and/or a negligible amount of force frequently or constantly to lift, carry, push, pull, or otherwise move objects, including the human body. Sedentary work involves sitting most of the time, but may involve walking or standing for brief periods of time. Jobs are sedentary if walking and standing are required only occasionally and other sedentary criteria are met.

Light Work Exerting up to 20 pounds (9.1 kg) of force occasionally and/or up to 10 pounds (4.5 kg) of force frequently, and/or negligible amount of force constantly to move objects. Physical demand requirements are in excess of those for Sedentary Work. Light Work usually requires walking or standing to a significant degree. However, if the use of the arm and/or leg controls requires exertion of forces greater than that for Sedentary Work and the worker sits most the time, the job is rated Light Work.

Medium Work Exerting up to 50 (22.7 kg) pounds of force occasionally, and/or up to 25 pounds (11.3 kg) of force frequently, and/or up to 10 pounds (4.5 kg) of forces constantly to move objects.

Heavy Work Exerting up to 100 pounds (45.4 kg) of force occasionally, and/or up to 50 pounds (22.7 kg) of force frequently, and/or in excess of 20 pounds (9.1 kg) of force constantly to move objects.

Very Heavy Work Exerting in excess of 100 pounds (45.4 kg) of force occasionally, and/or in excess of 50 pounds (22.7 kg) of force frequently, and/or in excess of 20 pounds (9.1 kg) of force constantly to move objects.

Renovascular Hypertension


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Diagnosis

History: The individual usually reports few or no symptoms. Infrequently, individuals may complain of headache, anxiety, the sensation of the heart pounding (palpitations), a rapid heartbeat (tachycardia), light-headedness, and mental sluggishness. If the onset is acute, the individual may have abdominal or flank pain, nausea, vomiting, fever, or severe headache.

Physical exam: Hypertension may be the only indication of RVHT. In up to 50% of individuals with RVHT, listening to the abdomen with a stethoscope (auscultation) may reveal an abnormal sound (abdominal bruit) (Schmidt). Changes in the retina (hypertensive retinopathy) may be seen. There may be evidence of congestive heart failure (CHF) such as swollen legs (peripheral edema), crackles or wheezing upon auscultation of the lungs (rales), and an enlarged liver.

Tests: Laboratory blood tests may be performed to evaluate renal function (metabolic panel and serum electrolyte levels); these tests may include blood urea nitrogen (BUN), serum creatinine, sodium, potassium, chloride, phosphorus, total carbon dioxide, and plasma renin activity. A urinalysis may reveal the presence of blood or protein in the urine.

The speed of blood flowing through the kidney may be measured using Duplex Doppler ultrasonography, which may help rule out renal artery stenosis. Other noninvasive procedures that allow imaging of the renal arteries include magnetic resonance angiography (MRA), in which a baseline image of the kidneys is taken, the individual is given an oral dose of the vasoconstrictive angiotensin-converting enzyme (ACE) inhibitor Captopril, and then a second image is taken to assess the amount of renal artery narrowing in response to the medication.

If MRA findings reveal a renal artery stenosis that may be successfully operated on (renal stent placement or renal angioplasty), renal angiography with dye injection into the renal artery may be performed to confirm the presence of RVHT.

In some cases, renal vein renin measurements may be performed to determine the blood levels of renin in the right and left renal veins. The measurements are compared with each other and with the renin levels in the inferior vena cava. Increased renin levels may help determine if the cause of the hypertension is kidney-related.

Source: Medical Disability Advisor