[Cave: interscalene catheters].

Interscalene regional anesthesia is an established and highly effective procedure; however, it represents an increased level of risk due to the close proximity of anatomical structures, such as the cervical spinal cord and many vessels. Furthermore, due to inadvertent placement of a catheter close to the cervical spinal cord or into a vessel, as opposed to a single shot injection technique, it remains a latent danger until it is removed. This article describes seven  cases of misplaced catheters.

[Ultrasound-guided infraclavicular venipuncture at the junction of the axillary and subclavian veins].

Background: Compared to other access routes a central venous catheter inserted via the subclavian vein (VS) is advantageous in terms of patient comfort, care of the puncture site and the infection rate. Puncture of the VS admittedly has a higher risk of mechanical complications but ultrasound guidance can reduce this risk; however, it is technically demanding due to anatomical peculiarities and this access route is therefore used comparatively less frequently.

Aim: The aim of the study was to clarify to what extent a modified puncture technique guided by sonography can reduce the risk potential.

[Epidural malpositioning of an interscalene plexus catheter].

A patient received an interscalene plexus catheter before shoulder surgery. After induction of general anesthesia catheter placement was performed with Winnie's technique and 5 ml of ropivacaine was injected via the catheter. In the recovery room slight dyspnea without wheezing was observed which improved spontaneously.

[Repeated percutaneous chemical sympathectomy as a therapeutic option for treating PAD II].

The value of percutaneous chemical lumbar sympathectomy (LSE) for the treatment of peripheral arterial disease (PAD) is still being discussed controversially. In particular, a benefit for Fontaine stage II PAD could not yet be shown. This case report is about a patient suffering from Fontaine stage II PAD.