Awareness and knowledge of the intrauterine device in adolescents

BackgroundThe purpose of this study was to explore intrauterine device (IUD) awareness and knowledge in a diverse, multiethnic population.MethodsWe conducted a self-administered, anonymous survey addressing awareness of the IUD as a contraceptive method and knowledge about aspects of IUD use in a group of women aged 14 to 19 years. Demographic and medical information was obtained to compare awareness and knowledge between demographic groups. Chi-square, Fisher exact test, and t tests were used for analysis. Multiple logistic regression was utilized to confirm relationships.ResultsOf the 106 respondents, 76.4% (81/106) were sexually active and 56.6% (60/106) reported a history of ever being pregnant. There were 21.1% (33/106) of respondents who had heard of the IUD as a contraceptive method. Of the subjects who had heard of the IUD, 39.4 % (13/33) were able to identify key features of the IUD. Although a history of pregnancy was predictive of having heard of the IUD, age, insurance status, education, and all other demographic factors were not associated with IUD awareness.ConclusionOver 70% of the adolescents had not heard of the IUD and less than half of adolescents who had heard of the IUD were able to identify key features about this contraceptive method. The lack of knowledge of this effective and safe contraceptive option is concerning given that most participants were at high risk for unintended pregnancy.     

Desensitization in delayed drug hypersensitivity reactions – an EAACI position paper of the Drug Allergy Interest Group

Drug hypersensitivity may deprive patients of drug therapy, and occasionally no effective alternative treatment is available. Successful desensitization has been well documented in delayed drug hypersensitivity reactions. In certain situations, such as sulfonamide hypersensitivity in HIV‐positive patients or hypersensitivity to antibiotics in patients with cystic fibrosis, published success rates reach 80%, and this procedure appears helpful for the patient management. A state of clinical tolerance may be achieved by the administration of increasing doses of the previously offending drug. However, in most cases, a pre‐existent sensitization has not been proven by positive skin tests. Successful re‐administration may have occurred in nonsensitized patients. A better understanding of the underlying mechanisms of desensitization is needed. Currently, desensitization in delayed hypersensitivity reactions is restricted to mild, uncomplicated exanthems and fixed drug eruptions. The published success rates vary depending on clinical manifestations, drugs, and applied protocols. Slower protocols tend to be more effective than rush protocols; however, underreporting of unsuccessful procedures is very probable. The decision to desensitize a patient must always be made on an individual basis, balancing risks and benefits. This paper reviews the literature and presents the expert experience of the Drug Hypersensitivity Interest Group of the European Academy of Allergy and Clinical Immunology.     

VERDICT MRI validation in fresh and fixed prostate specimens using patient‐specific moulds for histological and MR alignment

The VERDICT framework for modelling diffusion MRI data aims to relate parameters from a biophysical model to histological features used for tumour grading in prostate cancer. Validation of the VERDICT model is necessary for clinical use. This study compared VERDICT parameters obtained ex vivo with histology in five specimens from radical prostatectomy. A patient‐specific 3D‐printed mould was used to investigate the effects of fixation on VERDICT parameters and to aid registration to histology. A rich diffusion data set was acquired in each ex vivo prostate before and after fixation. At both time points, data were best described by a two‐compartment model: the model assumes that an anisotropic tensor compartment represents the extracellular space and a restricted sphere compartment models the intracellular space. The effect of fixation on model parameters associated with tissue microstructure was small. The patient‐specific mould minimized tissue deformations and co‐localized slices, so that rigid registration of MRI to histology images allowed region‐based comparison with histology. The VERDICT estimate of the intracellular volume fraction corresponded to histological indicators of cellular fraction, including high values in tumour regions. The average sphere radius from VERDICT, representing the average cell size, was relatively uniform across samples. The primary diffusion direction from the extracellular compartment of the VERDICT model aligned with collagen fibre patterns in the stroma obtained by structure tensor analysis. This confirmed the biophysical relationship between ex vivo VERDICT parameters and tissue microstructure from histology.