The reservoir can be pocketed in the thoraco-abdominal area or in the thigh. In order to ensure an easy puncture of the reservoir, there must be asufficiently consistent muscular plane below the reservoir. This can be obtained by pocketing the reservoir above the fascia of the quadriceps muscle (at the level of the thigh) or above the rib cage (after a long upward tunnel). When pocketing the reservoir above the thoracic cage, an adequate fixation of the reservoir to the fascia is necessary, so to minimize the risk of displacement.
In all cases, the critical point of all groin ports will be the risk of kinking or diplacement, due to the long tunneling of the catheter, sometimes obtained by curvilinear trajectories. Crossing of flexion zones (as in the downward tunneling towards the thigh) can increase the risk of kinking and malfunction.
Although there is no evidence in this regard, it is likely that for groin ports it is preferable to use polyurethane catheters, as they are less subject to displacement.