1. If necessary, the patient can remove the mouthpiece and breathe between the TGV and the SVC. Patients with severe
dyspnoea may have difficulty performing the preferred VC method (i.e. ERV immediately after TGV, followed by a slow
IVC). To overcome this, the patient can be instructed to take two or three tidal breaths after the panting manoeuvre,
prior to performing the linked ERV and IVC manoeuvres.