ITP (VERLGOF DISEASE0

In many cases, ITP is self-limited, and does not require treatment. Platelet counts less than ten thousand per mm3 usually require treatment(less than fifty thousand requires treatment, less than ten thousand is a potentially dangerous situation) and patients with significant bleeding and thrombocytopenia due to ITP are also usually treated. The threshold for treating ITP has decreased since the 1990s, and hematologists recognize that patients rarely bleed with platelet counts greater than ten thousand, though there are documented exceptions to this observation. Treatments for ITP include:

• Prednisone and other corticosteroids
• Intravenous gamma globulin
• Splenectomy
• Danazol
• Rituximab

Thrombopoetin analogues have been tested extensively for the treatment of ITP. These agents had previously shown promise but had been found to stimulate antibodies against endogenous thrombopoeitin or lead to thrombosis.

A medication known as AMG 531 was found to be safe and effective for the treatment of ITP in refractory patients. ^[5] AMG 531 is a peptide that bears no sequence homology with endogenous human thrombopoeitin, so it is not as likely to lead to neutralizing antibodies as previous peptide thrombopoeitin analogues. ^[6]

Treatment

Prednisone in a dose of 1 mg/kg/d for 2 weeks and then tapered over 2 more weeks has been shown to improve gastrointestinal and joint symptoms. Although this regimen did not decrease the incidence of renal disease, it did lessen the severity of nephritis in some patients.

Other treatment regimens have included IV or oral steroids with or without any of the following: azathioprine, cyclophosphamide, cyclosporine, dipyridamole, plasmapheresis, high-dose IV immunoglobulin G (IVIg), danazol, or fish oil. A recent study of 12 patients with severe HSP nephritis indicated that patients did well with a treatment of methylprednisolone at 30 mg/kg/d for 3 days followed by oral corticosteroids at 2 mg/kg/d for 2 months, cyclophosphamide at 2 mg/kg/d for 2 months, and dipyridamole at 5 mg/kg/d for 6 months.

Lesson 11.

Date: 2015-01-12; view: 706