Retrospective Study in Patients Who Have Had a Difficult Intubation.
Retrospective Study in Patients Who Have Had a Difficult Intubation.
The investigator wants to investigate if there is an increased risk of postoperative
 pulmonary problems in patients who have had an intubation where there was need for more than
 a laryngoscope.
A difficult intubation is defined as an intubation in which more than a laryngoscope was
 needed.

 Afterwards patient data retrieved from the Clinical Work Station: age, type of operation and
 time, date, type of anaesthesia, de tools needed for intubation, time needed for intubation
 and anaesthesia.

 In the Clinical Work Station of the Hospital the investigator will search for the following
 data in these selected patients: preoperative comorbidities, home medication, type of
 postoperative pulmonary problems and the treatment that was given, time of hospital stay and
 which department the patient stayed.

 Patients with a difficult intubation will be linked to a patient with a corresponding medical
 history and type of operation but without a difficult intubation. The investigator will look
 for the same parameters of these patients in the Clinical Work Station.

 By means of an odds-ratio the relative risk of a pulmonary complication after a difficult
 intubation in connection with an easy intubation with different variables can be calculated.
Inclusion Criteria:

 -  Every patient who had an intubation where another device than a laryngoscope was
 necessary

 Exclusion Criteria:

 -  N/A