  High-resolution observations in the region, centered at 4400 \AA\ and those
of the lines HeII 4686, Hbeta and HeI 6678 of the spectrum of the symbiotic
binary Z And were performed during its outburst in 2006. The line Hbeta had
additional satellite high-velocity emission components situated on either side
of its central peak. The lines of neutral helium presented two components,
consisting of a nebular emission situated close to the reference wavelength and
a highly variable P Cyg absorption. Close to the optical maximum the line HeII
4686 was weak emission feature, but with the fading of the light it changed
into an intensive emission consisting of a central narrow component and a broad
component with a low intensity. The lines of NIII and CIII were very broadened.
We demonstrate that all of these groups of lines with very different profiles
can be interpreted in the light of the same model, where a disc-shaped material
surrounding the compact object collimates its stellar wind and gives rise to
bipolar outflow.
