Main Menu

▼
  • Facebook Group
  • Rss Feed

11/15/15

dust diseases

The Dust diseases - Lung disorders caused by dust particles inhaled and absorbed into the lung tissues. There, they may cause fibrosis (formation of scar tissue) and progressive lung damage.

The main symptoms are a cough and breathing difficulty. It may take at least ten years of exposure to dusts containing coal, silica, talc, or asbestos before serious lung damage develops (see pneumoconiosis). Hypersensitivity to moulds on hay or grain may lead to allergic alveolitis.

Preventive measures, such as the installation of dust extraction machinery, have reduced the incidence of dust diseases, and replacements have been found for especially hazardous substances such as asbestos.
Read More

Duroziez's disease

The Duroziez's disease - A congenital (present at birth) form of mitral stenosis (a narrowing of the opening of the mitral valve, which is situated on the left side of the heart).
Read More

Dupuytren's contracture

The Dupuytren's contracture - A disorder of the hand in which one or more fingers become fixed in a bent position. In about half of the cases, both hands are affected. In most cases there is no apparent cause, but the disease may be, in part, inherited. Men over the age of 40 are most often affected.

The tissues just under the skin in the fingers or palm become thickened and shortened, which causes difficulty in straightening the fingers. Surgery can correct deformity of the fingers, but in some cases the condition recurs.
Dupuytren's contracture
Dupuytren's contracture
A band of tissue in the hand thickens and contracts, gradually pulling the fingers into a permanently bent position.
Read More

duplex kidney

The duplex kidney - Two fused kidneys on one side of the body. Another structural abnormality of the kidney is duplex renal pelvis, in which a single kidney has two renal pelvises (urine-collecting chambers).

A third possibility is duplex ureter, in which there are two ureters leading from one kidney. The ureters may open into the bladder, or, in females, one may open into the vagina. These malformations arise during formation in the embryo. Surgical correction may be necessary to prevent complications such as infections.
Read More

duodenum

LOCATION OF THE DUODENUM
The duodenum - The first part of the small intestine. The duodenum begins at the duodenal cap, just beyond the pylorus (the muscular valve at the lower end of the stomach). It extends to the ligament of Treitz, which marks the boundary with the second part of the small intestine (the jejunum). (See Location of the duodenum, opposite page.)

The duodenum is about 25 cm long and C-shaped; it forms a loop around the head of the pancreas. Ducts from the pancreas, liver, and gallbladder feed into it through a small opening. Digestive enzymes in the pancreatic secretions and chemicals in the bile are released into the duodenum through this opening.

Read More