The role of hysterosalpingography in modern gynaecological practice

In the article on “The role of hysterosalpingography in modern gynaecological practice”, Messrs Rajah, McHugo and Obhrai repeat a time honoured suggestion that a relaxant such as hyoscine butylbromide or glucagon can relax supposed tubal spasm. I have considerable doubt whether these agents have such a specific action. I understand that hyoscine is an anti-cholinergic agent which may induce relaxation of various smooth muscles including that of the Fallopian tubes and also the intestine, whereas the action of glucagon is largely that of producing relaxation of the intestine itself, and it is not considered to be an anti-cholinergic agent.