Determination of isotretinoin or etretinate and their major metabolites in human blood by reversed-phase high-performance liquid chromatography

A method is described for the quantitative analysis of isotretinoin and its 4-oxo metabolite, or of etretinate and its principal metabolites, in human blood in the range 10-2000 ng/ml. Following a simple one-step extraction, the compounds are determined by reversed-phase high-performance liquid chromatography (HPLC) with gradient elution and detection at 365 nm. This highly specific method separates the cis and trans isomers of the parent compounds and their metabolites. Examples are given of the application of this method to clinical studies of these two therapeutically important retinoids.     

High-dose induction chemotherapy of metastatic breast cancer in protected environment: a prospective randomized study

To test the hypothesis of whether high doses of chemotherapy in combination achieve higher response rates and longer durations of response and survival, we treated 33 pre- and perimenopausal patients with good performance status in a prospective trial with escalating doses of fluorouracil, doxorubicin and cyclophosphamide (FAC). Patients were randomly assigned to be treated within a protected environment (laminar air flow room), with prophylactic antibiotics, or in a standard hospital room. Important patient characteristics were equally distributed in the two treatment arms. A major objective response was observed in 27 of the 32 evaluable patients (84%), and 11 (34%) achieved a complete remission (CR). There was no significant difference in overall and complete response rates between the two treatment arms, nor was there a substantial difference in times to progression or survival between the groups treated in or out of the protected environment. Comparison of the results of this study with previously reported programs of FAC chemotherapy in patients with metastatic breast cancer shows that this study achieved higher overall and complete response rates. However, neither the time to progression, nor the survival of responders or the entire patient group was different from our previous experience with standard FAC chemotherapy. When the study was initiated in 1976, the proposed dose escalation represented high-dose chemotherapy. In retrospect, even the "high" doses used in this study represent only a modest increase over standard doses of chemotherapy. Much steeper dose escalations will be needed to evaluate the efficacy of high-dose chemotherapy in breast cancer, as well as the protective value of the protected environment and prophylactic antibiotics in metastatic breast cancer.     

Esophageal electrocardiography: a new technology revives an old technique

This study evaluates the clinical use of an easily swallowed bipolar electrode for recording an esophageal electrocardiogram (ECG). Fourteen patients were selected for bedside diagnosis (ECG group) because of arrhythmias difficult to evaluate using a standard 12-lead ECG. A second group of 27 non-selected patients scheduled for routine 24-hour ambulatory electrocardiographic recordings (ambulatory ECG group) had an esophageal ECG recorded as the "third channel." All 14 patients (100%) in the ECG group had excellent-quality tracings, and the esophageal ECG was diagnostic in 12 cases (86%). Of 27 patients in the ambulatory ECG group, 19 (70%) had fairly good to excellent-quality 24-hour esophageal pill tracings, with the esophageal ECG contributing to correct arrhythmia diagnosis in 11 patients (41%). It is concluded that this easily swallowed esophageal electrode provides an excellent-quality short-term ECG and often permits proper arrhythmia diagnosis in selected patients with arrhythmias. Good-quality 24-hour esophageal ambulatory electrocardiographic recordings can also be obtained that contribute to arrhythmia diagnosis in a limited number of unselected patients, and should be even more clinically useful in carefully selected patients.     

HPLC analysis of valepotriates in the north american genera plectritis and valeriana

Reversed phase HPLC has been applied to the isolation and quantitative distribution of valepotriates in roots and aerial parts of species and subspecies of the North American Genus PLECTRITIS (Valerianaceae) and in VALERIANA SITCHENSIS ssp. SCOULERI (Valerianaceae). A semipreparative Ultrasphere ODS column was used for separation and detection of small quantities of valepotriates in crude plant extracts.     

Rapid,Full-Scale Change to Virtual PCIT During the COVID-19 Pandemic: Implementation and Clinical Implications

Health agencies call for the immediate mobilization of existing interventions in response to numerous child and family mental health concerns that have arisen as result of the COVID-19 pandemic. Answering this call, this pilot study describes the rapid, full-scale change from a primarily clinic-based Parent–Child Interaction Therapy (PCIT) model to a virtual service model (i.e., I-PCIT) in an academic and community-based program in Miami, Florida. First, we describe the virtual service training model our program developed and its implementation with 17 therapists (M_Age?=?32.35, 88.2% female, 47.1% Hispanic) to enable our clinic to shift from providing virtual services to a small portion of the families served (29.1%) to all of the families served. Second, we examine the effect of I-PCIT on child and caregiver outcomes during the 2-month stay-at-home period between March 16, 2020, and May 16, 2020, in 86 families (M_ChildAge?=?4.75, 71% Hispanic). Due to the rapid nature of the current study, all active participants were transferred to virtual services, and therefore there was no comparison or control group, and outcomes represent the most recently available scores and not treatment completion. Results reveal that I-PCIT reduced child externalizing and internalizing problems and caregiver stress, and increased parenting skills and child compliance with medium to large effects even in the midst of the COVID-19 pandemic. Finally, the study examined components of our virtual service training model associated with the greatest improvements in child and caregiver outcomes. Preliminary findings revealed that locally and collaboratively developed strategies (e.g., online communities of practice, training videos and guides) had the strongest association with child and caregiver outcomes. Implications for virtual service delivery, implementation, and practice in the midst of the COVID-19 pandemic are discussed.

     

Correction to: Health Literacy Within a Diverse Community-Based Cohort: The Multi-Ethnic Study of Atherosclerosis

Journal of Immigrant and Minority Health - The original version of this article unfortunately contained a typo in co-author name.     

Surgical synovectomy in haemophilic arthropathy of the knee

Summary Twenty seven patients with haemophilia who had repeated haemarthroses affecting the knee joint, despite appropriate substitution therapy, were treated by surgical synovectomy. Open operations were carried out on 18 and 9 had an arthroscopic procedure. The average age at the time of synovectomy was 13 years for both the open and arthroscopic groups. The open group was followed up for an average of 15.2 years and the closed for 5.4 years. Operation took 70 minutes on average in the arthroscopic group and 50 minutes in the open. Patients who had an arthroscopy were in hospital for an average of 5 days and those with an open operation for 10. Synovectomy by both methods significantly reduced bleeding episodes. The results were assessed according to the classification recommended by the Orthopaedic Advisory Committee of the World Federation of Haemophilia. In the open group 2 patients had a good result, 10 were fair and 6 poor; in the arthroscopic group 3 had a good result, 5 were fair and 1 poor. Both operations appeared to slow, but did not halt, the radiographic deterioration of the joints.

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Résumé Vingt-sept hémophiles qui présentaient des hémarthroses récidivantes du genou en dépit d'une thérapeutique substitutive appropriée ont été traités par synovectomie chirurgicale, 18 à ciel ouvert et 9 par arthroscopie. L'âge moyen des malades au moment de l'opération était de 13 ans dans les deux groupes, le recul moyen des observations est de 15,2 ans dans le groupe opéré à ciel ouvert et de 5,4 ans dans l'autre, la durée de l'opération a été de 70 minutes dans le groupe arthroscopique et de 50 minutes dans l'autre, l'hospitalisation a été de 5 jours dans le groupe arthroscopique et de dix jours dans l'autre. Les deux techniques ont obtenu la diminution des épisodes hémorragiques. Les résultats ont été évalués selon la cotation du «Comité orthopédique consultatif de la Fédération mondiale de l'Hémophilie»: 2 sont bons, 10 médiocres et 6 mauvais dans le groupe opéré à ciel ouvert et 3 bons, 5 médiocres et 1 mauvais dans le groupe arthroscopique. Ces résultats montrent que les deux techniques peuvent ralentir la détérioration du genou, mais non l'interrompre.

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Deceased     

Injuries of the distal radioulnar joint

Injuries of the distal radioulnar (DRU) joint are common. If the joint is unstable or discongruous, attempts should be made to restore anatomic alignment and stability. Although most acute injuries of the DRU joint are easily treated, they are often overlooked or misdiagnosed because they usually occur in association with other major injuries of the upper limb. Acute and chronic abnormalities are described briefly and the treatment for each is discussed. Appropriate diagnosis and management of the acute injury will yield a much higher success rate than reconstructive procedures to correct a chronic disorder. A differentiation should be made between DRU joint dysfunction and ulnar impingement against the carpus; ulnar shortening is the most commonly used technique to treat the latter condition. In an elderly patient, a Darrach procedure is the preferred treatment for a DRU joint dysfunction; in younger patients, the treatment of choice appears to be resection arthroplasty of the DRU joint with preservation of the ulnar length, the ulnar styloid, and the triangular fibrocartilage complex (TFCC). In cases of malunion of the distal radius with involvement of the DRU joint, the recommended treatment is corrective osteotomy and soft tissue reconstruction of the ligamentous support of the joint.