The psychological impact of Stevens-Johnson syndrome and toxic epidermal necrolysis on patients' lives: a Critically Appraised Topic.

CLINICAL SCENARIO: A 65-year-old man presented with a 12-h history of deteriorating rash. Two weeks previously he had completed a course of neoadjuvant chemotherapy for ductal carcinoma of the breast. On examination there were bullae, widespread atypical targetoid lesions and 15% epidermal detachment. There was no mucosal involvement on presentation, but subsequently it did evolve. Skin biopsy showed subepidermal blistering with epidermal necrosis. This confirmed our clinical diagnosis of overlap Stevens-Johnson syndrome (SJS)/toxic epidermal necrolysis (TEN). On transfer to intensive care he was anxious and fearful. MANAGEMENT QUESTION: What are the psychological impacts of SJS/TEN on this man's life? BACKGROUND: SJS and TEN have devastating outcomes for those affected. OBJECTIVES: To conduct a Critically Appraised Topic to (i) analyse existing research related to the psychological impact of SJS and TEN and (ii) apply the results to the clinical scenario. METHODS: Seven electronic databases were searched for publications focusing on the psychological impact of SJS/TEN on adults over 18 years of age. RESULTS: Six studies met the inclusion criteria. Healthcare practitioners' (HCPs') lack of information around the disorder was highlighted. Patients experienced undue stress and fear. Some patients had symptoms aligned to post-traumatic stress disorder (PTSD), anxiety and depression. DISCUSSION AND RECOMMENDATION: The evidence suggests that SJS and TEN impact psychologically on patients' lives. Education of HCPs, to address their lack of awareness and information on SJS/TEN, should facilitate their capacity to provide information and support to patients, thereby reducing patient anxiety. On discharge, a follow-up appointment with relevant HCPs to reduce the possibility of PTSD occurring should be considered.

High risk HPV testing following treatment for cervical intraepithelial neoplasia.

AIM: To determine the results of combined cytology and high-risk human papilloma virus (HR HPV) tests at 6 and 18 months postcolposcopy treatment at one Irish colposcopy centre. METHODS: All women who attended the centre's colposcopy smear clinic for a co-test 6 months (initial test) posttreatment were included in the audit (n = 251). RESULTS: The results revealed negative HR HPV for 79 % (n = 198) of women tested 6 months after treatment and positive results for 21 % (n = 53). HR HPV testing was more sensitive than cytology and led to early detection of residual disease. No women with negative HR HPV had high-grade cytology. CONCLUSION: HR HPV is more sensitive than cytology for detection of persistent CIN. However, 19 women with positive HR HPV had normal colposcopy with no persistent CIN detected. A national cost-benefit analysis is recommended to determine the value of the second co-test.

Challenges to quality testing for bovine tuberculosis in Ireland; perspectives from major stakeholders.

Within the national bovine tuberculosis (bTB) eradication programme in Ireland, concern has been expressed about the quality of testing by veterinarians. However, there is little published evidence supporting this concern, or the challenges that undermine quality testing. Qualitative research methods were used to gather the perspectives of major stakeholders in the bTB eradication (BTE) scheme on the challenges to quality testing for bovine tuberculosis in Ireland. These stakeholders included private veterinarians, government veterinarians, senior managers and herd owners, on the quality of bTB testing and the barriers to improvement. Results are grouped into challenges that exist in the testing environment (ie, at a farm level), and challenges associated with the skills environment (ie, professional skills involved with conducting the test). Challenges in the testing environment include inadequate on-farm testing conditions; lack of clarity on responsibility to ensure adequate testing environment; and the influence of the veterinarian-client relationship. Challenges in the skills environment include deficiencies in the development and supervision of testing skills among trainees and newly qualified veterinarians; and deficiencies in testing standards at a practice level. Regular supervision of testing is necessary to ensure standards. The importance of a continued understanding of the disease (and its eradication) supported by a partnership, cooperative approach between all stakeholders, is emphasised.

An automatic seed finder for brachytherapy CT postplans based on the Hough transform.

PURPOSE: The purpose of the work is to describe a new algorithm for the automatic detection of implanted radioactive seeds within the prostate. The algorithm is based on the traditional Hough transform. A method of quality assurance is described as well as a quantitative phantom study to determine the accuracy of the algorithm. METHODS AND MATERIALS: An algorithm is described which is based on the Hough transform. The Hough transform is a well known transform traditionally used to automatically segment lines and other well defined geometric objects from images. The traditional Hough transform is extended to three-dimensions and applied to CT images of seed implanted prostate glands. A method based on digitally reconstructed radiographs is described to quality assure the determined three-dimensional positions of the detected seeds. Two phantom studies utilizing eight seeds and nine seeds are described. All eight seeds form a contiguous a square while the nine seed phantom describes seeds which are placed side-by-side in groups of two and three. The algorithm is applied to the CT scans of both phantoms and the seed positions determined. RESULTS: The algorithm has been commercially developed and used to perform postsurgical dosimetric assessment on approximately 1000 patients. Using the described quality assurance tool it was determined that the algorithm accurately determined the seed positions in all 1000 patients. The algorithm was also applied to the eight seed phantom. The algorithm successfully found all eight seeds as well as their seed coordinates. The average radial error was determined to be 0.9 mm. For the nine seed phantom, the algorithm correctly identified all nine seeds, with an average radial error of 3 mm. CONCLUSIONS: The described algorithm is a robust, accurate, automatic, three-dimensional application for CT based seed determination.

Automatic detection of linear artifacts in medical images.

Our purpose in this study is to describe an algorithm for the automatic detection of linear artifacts in medical images. Linear artifacts arise as a result of many different forms of tissues and tissue boundaries within the imaging volume. Additionally, linear artifacts can arise for artificial structures such as radioactive seeds and radioactive linear sources. It is the purpose of the described algorithm to automatically detect linear artifacts of a certain length and diameter. The algorithm was written and compiled on a Pentium-4 based computer in the Microsoft Visual C/C++ language. Inert coils supplied by Radiomed Inc. were implanted into a standard prostate ultrasound phantom. Transaxial ultrasound images of the implanted phantom were obtained at 2 mm increments. The coded algorithm was then applied to the ultrasound imaging volume to automatically segment out the implanted coils. Thirteen coils were implanted in the prostate phantom. Thirteen coils were automatically identified in the imaging volume. An algorithm was developed to automatically determine the position and orientation of radioactive coils within an imaging volume. The algorithm successfully identified thirteen coils implanted in an ultrasound prostate phantom.

Intraoperative treatment planning for radioactive seed implant therapy for prostate cancer.

We describe a procedure for intraoperative treatment planning for seed implantation. One hundred seven treatment plans have been analyzed at the Beth Israel Deaconess Medical Center and affiliated hospitals. The average time for the intraoperative procedure was 1. 74 hours. No significant difference in dose coverage to the prostate or normal tissues was evident.

Analysis of prostate seed loading for permanent implants.

The goal of radioactive seed implantation in prostate cancer is to treat the tumor to the necessary dose while minimizing the dose to adjacent normal structures. The uniform and peripheral loading schemes used in the past have serious limitations. However, with the availability of three-dimensional treatment-planning systems, it has become possible to do custom volume loading based on volumetric ultrasound imaging of the gland. As a result, the dose distributions are more uniform, and the doses to the urethra and rectum are maintained in a safe range.