Non-specific passive desensitization XX: two important technical details.

For non-specific passive desensitization to be effective two steps are necessary: (1) dialyze concentrated gamma globulin precipitated from plasma or serum by ammonium sulfate and (2) allow time for complete recovery from the initial reaction to antigen aerosols before giving the desensitizing dose of gamma globulin.     

Pseudoaneurysm: a complication of faulty technique in femoral arterial puncture

Pseudoaneurysm is a well-documented but rare complication of retrograde femoral arterial puncture. We present six patients in whom pseudoaneurysm complicated this procedure. The pseudoaneurysm arose from the superficial femoral artery in five patients and from the profunda femoris artery in one. An arteriovenous fistula also arose from the superficial femoral artery in one patient. In no patient did the pseudoaneurysm arise from the common femoral artery. Two mechanisms are postulated as to why pseudoaneurysms rarely complicate puncture of the common femoral artery.