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  • Title: Comparative quantitation of menstrual blood loss with the Lippes Loop, Dalkon Shield, and copper T intrauterine devices.
    Author: Israel R, Shaw ST, Martin MA.
    Journal: Contraception; 1974 Jul; 10(1):63-71. PubMed ID: 4442266.
    Abstract:
    The magnitude of menstrual blood loss and the incidence of menorrhagia associated with 2 plastic intrauterine devices (IUDs), THE Lippes loop and standard-size Dalkon shield, were compared with a copper T device (TCu 300). In order to evaluate long-term as well as short-term effects, blood loss was measured at postinsertion levels of 6, 12, and 18 months in 72 women wearing the Lippes loop, in 73 wearing the Dalkon shield, and in 82 with TCu 300. Increases in the mean blood loss over controls (35.3 ml) for the Lippes loop at 6, 12, and 18 months were 112%, 60%, and 95%, respectively. Corresponding increases for the Dalkon shield were 71%, 112%, and 86%; those for the TCu 300 were 54%, 56%, and 41%. There was significantly less bleeding with the TCu 300 than with either of the other 2 devices (p.05). The Lippes loop and the Dalkon shield were associated with fluctuating blood loss values whereas blood loss with the TCu 300 was relatively stable at all study periods.
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