Multidisciplinary care model for HIV improves treatment outcome: a single-centre experience from the Middle East.

Multidisciplinary team (MDT) care models have been shown to improve clinical outcomes among HIV patients. We aim to assess the impact of adopting MDT approach in a tertiary HIV clinic in Muscat, Sultanate of Oman. We introduced MDT approach in our HIV centre in January 2016 where existing team members (counsellors, nurses, social workers, pharmacists and doctors) worked together, through care pathways, to support patients as they go through the HIV care continuum from diagnosis to viral suppression. Notes were reviewed for demographics and clinical data. The primary outcome was HIV viral load (VL) suppression (<20, < 200 and < 1000 copies/ml) in measurements by December 2015 and June 2017. In December 2015, 253 patients were in care; 98.4% (249/253) were on antiretroviral therapy (ART). Median age was 41 years and 70% were males. Median baseline CD4 was 204. In June 2017, 294 were in care with similar patient characteristics to those in care in 2015. The majority, 95.9% (282/294), were on ART; 8 of whom started ART within 3 months, hence excluded from the VL analysis. Overall, VL < 200 and < 1000 rates increased from 71.9% and 78.7% in 2015 to 90.5% and 95.6% in 2017, with relative risk (RR) (95% CI) of 1.26 (1.15-1.37) and 1.21 (1.13-1.30), respectively; p value < 0.0001 for both. In a sub-analysis of 214 patients who were in care in 2015 and remained in care in 2017, VL < 200 and < 1000 rates increased from 78.5% and 85% in 2015 to 90.2% and 94.4% in 2016, with RR (95% CI) of 1.15 (1.06 to 1.25) and 1.11 (1.04-1.18), respectively; p values of 0.0010 for both. MDT approach has significantly improved treatment outcome for existing patients and those who have attended our services since the introduction of the MDT model.

Structural forces from directed self-assembly.

We investigate a candidate structure for the bottom-up design of nanocomposite materials. At a pair of crossing carbon nanotubes, surfactants self-assemble into a micelle-like aggregate incorporating the two tubes. The aggregate forms as long as the gap between the tubes is smaller than the core diameter of a bulk micelle. Moreover, the absorbed surfactant aggregate generates an effective force between the tubes. The dependence of this force on the distance between the tubes is complex and includes structural components, such as layering, and a large attractive region at larger distances. This attraction appears to be entropic in nature and to originate from confinement of the surfactant head groups.

Comparison of pheochromocytomas and abdominal and pelvic paragangliomas with head and neck paragangliomas.

OBJECTIVE: To compare clinical, radiologic, and pathologic characteristics, as well as management and outcomes, in a series of pheochromocytomas, abdominal and pelvic paragangliomas, and pelvic paragangliomas with head and neck paragangliomas. METHODS: In this retrospective study, we reviewed charts of all patients seen at our institution between January 1995 and December 2006. We searched pathology and medical record databases under the terms pheochromocytoma, paraganglioma, head and neck tumors, carotid body tumors, glomus jugulare, and neuroendocrine tumors. We compared clinical, radiologic, and pathologic characteristics, as well as management and outcomes, between patients with pheochromocytoma, abdominal and pelvic paraganglioma, and head and neck paraganglioma. RESULTS: Eighty-six patients were included (46 with head and neck paraganglioma, 23 with pheochromocytoma, and 17 with abdominal or pelvic paraganglioma). Compared with patients with head and neck paraganglioma, patients with pheochromocytoma or abdominal and pelvic paraganglioma were younger (35.7 +/- 16 years vs 43 +/- 17 years, P = .042) and were more likely to have the classic triad associated with catecholamine hypersecretion of palpitation, excessive sweating, and headache (40% vs 0%, P<.001); hypertension (70% vs 37%, P = .005); and benign tumors (65% vs 43%, P = .03). Patients with head and neck paraganglioma and patients with pheochromocytoma/abdominal and pelvic paraganglioma were not different in female to male ratios (27:19 vs 29:11, respectively, P = .18), tumor size (5.8 +/- 2.7 cm vs 5.7 +/- 3 cm, respectively; P = .85), or remission rate (43% vs 60%, respectively, P = .13). CONCLUSIONS: Head and neck paraganglioma are similar to pheochromocytoma and abdominal and pelvic paraganglioma in size and outcome, but occur at an older age, lack hyperadrenergic manifestations, and are more likely to have local pressure effects and result in persistent disease.