This study is looking at a device called the Surfacer System. It helps people who need a special tube, called a catheter, in their chest but can't get it the usual way due to blockages. The study will watch how the device works in patients in the U.S. A total of 30 patients will be part of the study, with up to 12 hospitals participating. Each patient must agree to let doctors use their health information for the study.

Key Points:

• The study involves observing patients, meaning no extra treatments are given.
• Participants must have upper body vein blockages and be able to give consent.
• Patients cannot participate if they have certain blockages in key veins or a recent clot.

If you are part of this study, remember it's about watching how well the Surfacer System works for your condition. You won't receive special treatments beyond what's described. Make sure you understand everything before signing the consent form!