Handheld DAS Medical Calculator portable

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DAS (Disease Activity Score) Calculator

Has a clamshell cover Large easy to push keys Auto-off function

Calculates:

DAS--3 and 4 variable
DAS28--3 and 4 variables
DAS CRP--3 and 4 variables

Both Metric & Imperial inputs can be used
3 Position switch to switch between the 3 different calculations

List Price: $32.00
Our Price: $28.00
You save $4.00!

Availability:: Usually Ships in 24 to 48 Hours
Product Code: 2121DAS

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Description

Instructions

DAS (Disease Activity Score Calculator):

Battery powered portable electronic calculator

Calculates Disease Activity Score (DAS)

Capable of calculating the following DAS formulas:

DAS 3 and 4 variable

DAS28 3 and 4 variables

DAS28 CRP 3 and 4 variables

DAS CRP 3 and 4 variables

Has a clamshell case with hinge. Size approximately 5"x 3" x 3/8" when closed. Includes two easily available and replaceable button cells.

Price:

Item Quantity	1-10	11-20	21-50	50-100
Price based on quantity ordered	$28.00	$26.00	$25.00	$23.00

Disease Activity Score for Arthritis
Capable of doing the DAS Crp (C reactive Protein) calculation

Features

The Disease Activity Score (DAS) is a combined index that has been developed in Nijmegen, Holland by Professor Piet L.C.M. van Riel in the eighties to measure the disease activity in patients with Rheumatoid Arthritis (RA). It has been extensively validated for its use in clinical trials in combination with the EULAR response criteria. Its easy use makes it also possible to collect valuable information about the disease activity of patients in daily clinical practice.
Evaluation of response to a treatment can be made much easier and more objective using the DAS. Just assess the number of swollen and tender joints and measure the ESR. The DAS will provide you with a number between 0 and 10, indicating how active the rheumatoid arthritis is at this moment.
Recently the DAS-CRP has been developed. The C-reactive protein (CRP) may be used as an alternative to ESR in the calculation of the DAS or the DAS28.
Using the DAS, several treshholds have been developed for high disease activity, low disease activity or even remission. Also response criteria have been developed based on the DAS, so when the DAS of a patient is measured at two timepoints (e.g. before the start of a treatment and after 3 months), the patients clinical response can be assessed.

The electronic calculator we developed is capable of calculating:

1. DAS 3 and 4 variable
2. DAS 28 3 and 4 variable
3. DAS 28 CRP utilizing the C reactive protein

DAS-4(crp) = 0.54*sqrt(RAI)+ 0.065*SJC44 + 0.17*ln(CRP+1) + 0.0072*GH + 0.45
DAS-3(crp) = 0.54*sqrt(RAI)+ 0.065*SJC44 + 0.17*ln(CRP+1) + 0.65
RAI: Ritchie Articular Index; SJC44: 44 Swollen joint count; CRP:
C-reactive protein; GH: General Health on a 100mm. Visual Analogue
Scale.
DAS28 = 0.56 * sqrt(tender28) + 0.28 * sqrt(swollen28) + 0.70 * ln(ESR) + 0.014 * GH
DAS28-4(crp) = 0.56*sqrt(TJC28) + 0.28*sqrt(SJC28) + 0.36*ln(CRP+1) + 0.014*GH + 0.96
DAS28-3(crp) = [0.56*sqrt(TJC28) + 0.28*sqrt(SJC28) + 0.36*ln(CRP+1)] * 1.10 + 1.15