Anaesthetic implications of 32% Dextran-70 (Hyskon) during hysteroscopy: hysteroscopy syndrome

D Mangar
Canadian Journal of Anaesthesia 1992, 39 (9): 975-9
This review describes the properties and side effects of Hyskon and the implications for the patient and anaesthetist during hysteroscopy. The amount of Hyskon absorbed is dependent on the injection pressure, the extent of tissue trauma, the seal of the hysteroscope around the cervix, and the duration of infusion. The mechanism of pulmonary oedema after absorbtion of Hyskon is fluid overload, and not injury to pulmonary capillary endothelium. The haematological effects are primarily due to haemodilution. However, case reports suggest that Dextran 70 may cause a syndrome resembling disseminated intravascular coagulation. The allergic response to Hyskon consists of both an anaphylactic and an anaphylactoid component. It is recommended that hysteroscopy with Hyskon be limited to 45 min, and that all possible measures be taken to minimize tissue trauma and bleeding. The volume of Hyskon should be limited to less than 500 ml, since pulmonary oedema and coagulopathy have been described with even lesser amounts. The cumulative volume of Hyskon should be monitored frequently and the patient should be closely monitored for signs of impending pulmonary oedema.

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