Fig. 1Zweymuller stem (Plus Orthopaedics, Rotkreuz, Switcherland).
Fig. 2Cross section of metaphysio-diaphyseal junction of femur implanted with Zweimuller stem.
Fig. 3A 82 years old had the bipolar hemiarthroplasty with Zweymuller stem for the femur neck fracture. Radiography at post operative 4 years showed well fixation of the stem without subsidence.
Fig. 4A 86 years old patient who diagnosed pulmonary embolism after bipolar hemiarthroplasty with using cemented stem. At post op two day, the patient complained dyspnea. Pulmonary embolism was confirmed by CT and lung perfusion scan.
Table 1Patients demographics
Table 2ASA classification
Table 3Clinical results
Table 4Koval's ambulatory ability