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


Related Terms

  • Chronic Renal Artery Stenosis
  • Renal High Blood Pressure
  • Renal Vascular Hypertension

Differential Diagnosis

Specialists

  • Cardiovascular Internist
  • Nephrologist
  • Physical Therapist

Comorbid Conditions

Factors Influencing Duration

Factors affecting the length of disability include the individual's age, lifestyle modifications, the extent of renovascular damage and systemic vascular disease, the presence of bilateral disease, the specific treatments instituted (medical, PTRA, or surgical), the individual's response to treatment, and the development of complications.

Medical Codes

ICD-9-CM:
405.01 - Renovascular Hypertension, Secondary, Malignant
405.11 - Renovascular Hypertension, Secondary, Benign
405.91 - Hypertension, Renovascular, Secondary, Unspecified

Overview

Renovascular hypertension (RVHT) is a potentially curable rise in blood pressure that results from narrowing (stenosis) of the main artery supplying a kidney (renal artery), or its branches. The arterial stenosis may affect one or both kidneys (unilateral or bilateral disease).

Stenosis reduces blood flow to the kidney(s), which in turn decreases the amount of oxygen within kidney tissue (renal ischemia). The decreased blood supply and decreased oxygen levels stimulate the kidney to release the hormone renin, one of several hormones that can cause peripheral blood vessels to constrict (vasoconstriction). This vasoconstriction leads to high blood pressure (hypertension).

In approximately 66% to 80% of RVHT cases, renal artery stenosis and subsequent decreased blood flow to the kidney are caused by the buildup of fatty deposits or plaque along vessel walls (atherosclerotic disease); this most commonly occurs in the larger, proximal part of the main renal artery. The remaining 20% to 33% of cases are caused by fibromuscular disease (fibromuscular dysplasia) of the renal artery wall, most typically affecting the distal parts of the main renal artery and the small arterial branches (Bakris; Schmidt).

Findings that may suggest RVHT include hypertension of sudden onset, difficult-to-control hypertension (refractory hypertension), frequent episodes of extremely elevated blood pressure (malignant hypertension), and hypertension associated with fluid in the lungs (pulmonary edema) or decreased renal function over time.

Incidence and Prevalence: RVHT that is caused by atherosclerotic disease is most common in men older than age 50, whereas RVHT caused by fibromuscular dysplasia is observed more frequently in women younger than age 40 (Bakris; Schmidt). RVHT occurs in less than 2% of all individuals with hypertension and in approximately 40% of older individuals with atherosclerotic disease (Bakris; Piecha); however, RVHT occurs in as many as 60% of all individuals older than age 70 (Schmidt). Both renal artery stenosis and RHVT are more common in white than black adults (Schmidt).

Source: Medical Disability Advisor






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