Capillary Resistance Test (F)

Question 1

What are the purposes of capillary resistance test?

Answer 1

1) Measures the ability of capillaries to resist pressure

2) Marker of capillary fragility or permeability

Question 2

What is the other term for CRT?

Answer 2

1) Tourniquet test
2) Rumpel-Leede test
3) Hess test

Question 3

What is the normal result for CRT?

Answer 3

1+

Question 4

What is the procedure (or steps) of CRT?

Answer 4

1) Take the pt’s bp and record the systolic and diastolic reading
2) Wrap the pressure cuff of the sphygmomanometer around the arm just above the elbow. Mark any tiny hemorrhages or petechiae already present
3) Inflate the sphygmomanometer at the required pressure within the required time. Release the pressure. Allow 2 - 5 mins to elapse
4) Ct the # of fresh petechiae below antecubital fossa

Question 5

What are the different procedures for respective methods?

Answer 5

1) Name of method: NA
Pressure and time: 100 mmHg for 5 mins
2) Name of method: NA
Pressure and time: 50 mmHg for 10 mins
3) Name of method: Gothlin's 
Pressure and time: 35 mmHg for 15 mins
4) Name of method: Quick's (CDC)
Pressure and time: midway pressure bet determined systolic pressure and diastolic pressure for 5 mins

Question 6

What are the corresponding readings, gradings, and interpretation for CRT?

Answer 6

Reading: 1 - 10
Grading: 1+
Interpretation: normal

Reading: 11 - 20
Grading: 2+
Interpretation: positive

Reading: 21 - 50
Grading: 3+
Interpretation: positive

Reading: 50+
Grading: 4+
Interpretation: positive

Question 7

What are the causes of positive CRT?

Answer 7

1) Dengue hemorrhagic fever
2) Rendu-Osler-Weber syndrome
3) Kasabach-Merritt syndrome
4) Ehlers-Danlos syndrome
5) Henoch-Schonlein purpura
6) Senile purpura
7) Vitamin C deficiency
8) Drug-induced vasculitis