23 Questions
What is the main component of lymph?
Water
Which type of oedema occurs when the amount of fluid in the interstitial spaces exceeds lymphatic transport capacity?
Dynamic Insufficiency
What are the contents of lymph?
Water, Electrolytes, White Blood Cells, Protein molecules
What causes high capillary pressure?
Right ventricular failure, Chronic venous insufficiency, Deep vein thrombosis
What causes decreased plasma oncotic pressure?
Dietary deficiencies, liver disease, kidney disease
What causes increased permeability of capillaries?
Trauma, Allergy, Acute infection, Lipoedema (increased tissue compliance), Pregnancy, Menstruation
According to Starling's principle, which of the following is true about hydrostatic pressure in the capillary bed?
It is highest at the arterial end
What is the role of oncotic pressure in the capillary bed?
It draws water towards solutes
Under normal circumstances, what happens to the excess fluid that is not reabsorbed in the capillary bed?
It is taken up by the lymphatic system
According to Starling's findings, why is there an excess of fluid in the interstitial spaces?
The lymphatic capillaries are unable to reabsorb all of the fluid
What is the pressure difference at the arteriole end of the capillary bed?
10 mmHg into the interstitial space
According to Starling's Principle, what is the net movement of fluid at the venule end of the capillary bed?
Absorption
What factors determine the movement and quantity of fluid in the capillary bed?
Fluid permeability and solute permeability
What is the approximate amount of fluid that is not reabsorbed and taken up by the lymphatic system per day?
3L
Which type of oedema occurs when there is disruption to the process of fluid uptake into the lymphatic system?
Dynamic Insufficiency
What causes decreased plasma oncotic pressure in the capillary bed?
Liver disease
What causes increased permeability of capillaries in the capillary bed?
Trauma
According to Starling's principle, what is the net movement of fluid at the arteriole end of the capillary bed?
Filtration into the interstitial space
According to Starling's Principle, what is the net movement of fluid at the venule end of the capillary bed?
Fluid is reabsorbed into the capillary bed
Under normal circumstances, what happens to the excess fluid that is not reabsorbed in the capillary bed?
It is taken up by the lymphatic system
Which of the following is NOT a cause of high capillary pressure in the capillary bed?
Liver disease
What is the normal value for capillary pressure?
32 mmHg. 14mmHg
What is the normal value for plasma oncotic pressure?
25 mmHg
Test your knowledge on lymph formation, vascular pathology, and physiotherapy in Unit 4. Learn about lymph and its contents, the process of lymph formation according to Starling's Principle, different types of edema, and causes of both mechanical and dynamic lymphedema.
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