|Symptoms & Signs|
Place 2 mls of freshly sampled venous blood in a small, new or heat cleaned,dry, glass vessel.
Leave undisturbed for 20 minutes at ambient temperature.
Tip the vessel once after 20 minutes.
The blood is still liquid (unclotted) and runs out, the patient has hypofibrinogenaemia (“incoagulable blood”) as a result of venom-induced consumption coagulopathy.
If there is any doubt, repeat the test in duplicate, including a “control” (blood from a healthy person such as a relative)