Longitudinal heat conduction is an important parameter in the cryogenic field, especially in cryogenic heat exchangers. In the present work, the parasitic effect of tube wall longitudinal heat conduction on temperature measurement has been studied in cryogenic laminar hydrogen flow. The effects of various parameters such as wall cold end temperature, wall thermal conductivity, gas volumetric fl...

To the Editor, As discussed in our paper, positioning the VivaSight DLT 34 sec faster than positioning a conventional doublelumen tube is of marginal clinical importance. Then again, faster insertion is consistent with the fact that the tube is easy to use. Furthermore, the ability to obtain immediate assurance of at least an approximately correct position with the VivaSight camera likely facil...

The laryngeal tube has a potential role in airway management during anaesthesia or cardiopulmonary resuscitation. In patients with unstable necks, the head and neck may need to be stabilised manually (manual in-line stabilisation), but it is not known whether this procedure affects the ease of insertion of the laryngeal tube. We studied, in a cross-over study, 21 adult patients to compare the s...