heeding these recommendations for use to ensure patient safety.In spite of the overwhelming evidence that highlights the effectiveness of routine vaccination, an increasing number of people are refusing to follow recommended vaccination schedules. While the majority of research in this area has focussed on vaccine hesitancy in parents, there is little research on the factors that promote vaccine hesitancy in health care providers (HCPs). Identifying factors that promote vaccine hesitancy in HCPs is essential because it may help broaden our understanding of vaccine hesitancy in patients. Therefore, the goal of this investigation was to review 21 studies and examine how professional autonomy and risk perception may promote vaccine acceptance, rejection and delay in physicians and nurses. We found that vaccine hesitant nurses and physicians shared similar views towards vaccines; both groups believed that their decision to vaccinate was separate from their role as an HCP. This belief comprised of three themes decisional autonomy, personal risk perception and alternatives to vaccination. Both groups believed that mandatory vaccine policies reduced their ability to decide whether vaccination was in their best interests. We argue that decisional autonomy may weaken risk perception of disease, which in turn may encourage beliefs and behaviours that reinforce a ‘hero persona’ that reduces appropriate preventive and hygiene measures. We employ the Health Belief Model to discuss the crucial role that risk perceptions may play in reinforcing autonomy in vaccine hesitant physician and nurses. We conclude this paper by providing a set of recommendations that aim to improve the decision-making process surrounding mandatory vaccinations for HCPs.Nestled in the parasellar region, surrounded by critical neurovascular structures, diaphragm sellae meningiomas although rare present distinct clinical, radiological, and surgical considerations.1-3 Consequently, they present surgical challenges that could be overcome with technical nuances. Epigenetic inhibitor chemical structure The origin of this meningioma on the diaphragm creates a distorted anatomy, which must be comprehended for the safe approach and resection.  Three distinct subtypes of diaphragm sellae meningiomas are described, each with distinctive clinical presentations and surgical treatment implications.2 Type A originates from the upper leaf of diaphragm sellae pushing the stalk posteriorly. It usually presents with unilateral visual loss. Type B originates from the upper leaf of the diaphragm sellae pushing the stalk anteriorly. It presents with few visual symptoms, but memory disturbance and hypopituitarism are common. Type C originates from the inferior leaf of the diaphragm sellae (intrasellar meningioma) presenting with bitemporal hemianopsia and hypopituitarism. Recognizing these variations in this rare tumor subtype is critical to minimizing potential adverse outcomes associated with operative treatment. The cranial approach has been the recommended route for these lesions with an exception of the intrasellar type.1,3  In this article, we depict the pathological anatomy and demonstrate the surgical nuances in handling diaphragm sellae meningioma resection through a cranio-orbital approach4 in a patient who had an unsuccessful trans-sphenoidal resection attempt. The patient consented for the procedure.  Image at 138 from Al-Mefty O, Operative Atlas of Meningiomas, © LWW, 1997, with permission. Image at 856 from Kinjo et al,2 Diaphragma sellae meningiomas, case reports, Neurosurgery, 1995, 36(6), 1082-1092, by permission of the Congress of Neurological Surgeons.

The relationship between trans-stenotic blood flow velocity differences and the cerebral venous pressure gradient (CVPG) in transverse sinus (TS) stenosis (TSS) has not been studied.

To evaluate the hemodynamic manifestations of TSS and the relationship between trans-stenotic blood flow velocity differences and the CVPG.

Thirty-three patients with idiopathic intracranial hypertension (IIH) or pulsatile tinnitus (PT) and TSS who had undergone diagnostic venography using venous manometry were included in the patient group. Thirty-three volunteers with no stenosis and symptoms were included in the control group. All the 2 groups underwent prospective venous sinus 4-dimensional (4D) flow magnetic resonance imaging (MRI). The average velocity (Vavg) difference and maximum velocity (Vmax) difference between downstream and upstream of the TS in 2 groups were measured and compared. Correlations between the CVPG and trans-stenotic Vavg difference/Vmax difference/index of transverse sinus stenosis (ITSS) were assessed in the patient group.

The differences in Vavg difference and Vmax difference between the patient and control groups showed a statistical significance (P<.001). The Vavg difference and Vmax difference had a strong correlation with CVPG (R=0.675 and 0.701, respectively, P<.001) in the patient group. Multivariate linear regression using the stepwise method showed that the Vmax difference and ITSS were correlated with the CVPG (R=0.752 and R2=0.537, respectively; P<.001).

The trans-stenotic blood flow velocity difference significantly correlates with the CVPG in TSS. As a noninvasive imaging modality, 4D flow MRI may be a suitable screening or complimentary tool to decide which TSS may benefit from invasive venous manometry.

The trans-stenotic blood flow velocity difference significantly correlates with the CVPG in TSS. As a noninvasive imaging modality, 4D flow MRI may be a suitable screening or complimentary tool to decide which TSS may benefit from invasive venous manometry.

Debate continues on whether a bilateral (BLT) or a single lung transplantation (SLT) is preferred for patients with end-stage chronic obstructive pulmonary disease (COPD). The purpose of this study is to examine the interplay between patient age and transplant type on survival outcomes.

We performed a retrospective study of lung transplants for COPD at our centre from February 2012 to March 2020 (n = 186). Demographics and clinical parameters were compared between patients based on their age (≤65 vs >65 years old) and type of transplant (single vs bilateral). Cox proportional hazards regression was also performed. P-values <0.05 were considered significant.

Of the 186 patients with COPD who received lung transplants, 71 (38.2%) received BLTs and 115 (61.8%) received SLTs. There was no significant difference in survival outcomes when looking at patients with single versus BLTs (P = 0.870). There was also no difference in survival between the 2 age groups ≤65 versus > 65 years (P = 0.723). The Cox model itself also did not show a statistically significant improvement in survival outcomes (P = 0.