Blood tests can look for the presence of some inflammatory chemicals called tryptase and histamine, which may be elevated during anaphylaxis. But these are not required for diagnosis. If you have known allergies, it may help to see an allergist. Allergists are doctors who specialize in allergies...
These include (1) barotrauma with elevated shear stress on the alveolar lining; (2) volutrauma with large tidal volumes that can disrupt the epithelial–capillary interface; (3) atelectrauma caused by mechanical ventilation-associated stress fracture of the epithelial– capillary interface ...
Hallgren J, Spillmann D, Pejler G (2001) Structural requirements and mechanism for heparin-induced activation of a recombinant mouse mast cell tryptase, mouse mast cell protease-6: formation of active tryptase monomers in the presence of low molecular weight heparin. J Biol Chem 276: 42774–4278...