Dennis Parhar's research while affiliated with University of British Columbia and other places
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Publications (9)
Purpose
To determine whether hepatic hilar nerve block techniques reduce analgesic and sedation requirements during percutaneous image-guided thermal ablation of hepatic tumors.
Materials and Methods
A single-center retrospective cohort analysis was performed of 177 patients (median age 67; range 33 – 86) who underwent percutaneous image-guided th...
Introduction
A number of initiatives have been introduced to address the issue of gender disparity within radiology. It remains to be seen whether these endeavors have resulted in any significant improvement, particularly within the subspecialties of radiology. We aimed to assess the trends in gender distribution of radiology subspecialty training...
Introduction:
Since their introduction to the International Neuroblastoma Risk Group (INRG) staging system in 2009, the role of Image-Defined Risk Factors (IDRFs) in predicting outcomes has been studied in heterogeneous populations with varying results. We conducted a systematic review and meta-analysis in order to determine quantitative measures...
Purpose
Owing to the increasing average age of first-time mothers, as well as advances in assistive reproductive technology, the number of hysterosalpingography (HSG) requests has continued to rise. This increases the likelihood of patients presenting with unsuspected early pregnancies prior to HSG. Currently, there is no standard of practice for t...
Ascending aortic pseudoaneurysms are a rare but potentially life-threatening complication of aortic root or cardiac surgery. Surgical repair is established as first-line treatment; however, patient comorbidities, technical considerations, and anatomic limitations often preclude patients from repeat surgery, thus necessitating alternative approaches...
Purpose:
To retrospectively compare the image noise, signal-to-noise ratio (SNR), and subjective image quality between CT images acquired with a dual-source, split-dose imaging protocol reconstructed at full and half doses with weighted filtered back projection (wFBP) and an improved sinogram-affirmed iterative reconstruction algorithm (SAFIRE*)....
Citations
... In the 8 to 24 h post-procedure, those patients who underwent the block had significantly less use of intravenous morphine compared to those patients without the nerve block [22]. Another study of thermal ablation of hepatic tumors found that HHNBs significantly decreased the postoperative use of fentanyl and midazolam without impacting procedural success or adverse event rates [26]. These similarities in clinical outcomes in both referenced studies suggest that hepatic plexus nerve blocks can decrease utilization of postoperative opioid utilization in patients undergoing liver directed therapy. ...
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... Even if over the years pediatric surgeons developed techniques and implemented radiology tool to minimize mutilating surgery (18)(19)(20), the risk to develop long-term sequelae still exists. ...
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... These have not been proven safer compared to traditional open surgical repair, and complications such as aneurysm recurrence (Hibino et al. 2018), aorto-pulmonary fistula (Alameddine and Alimov 2016), as well as transient ischemic attack (in the case of thrombin injection (Lin et al. 2001)) have been reported. Direct percutaneous puncture as well as transapical approaches have also been described (Hadjivassiliou et al. 2017;Parhar et al. 2019); however this was felt to not be appropriate in our patient due to the position and orientation of the pseudoaneurysm. Transarterial coil embolization of aortic root pseudoaneurysms has not been previously described in patients with LDS. ...
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... This blended image ensures acceptable image quality and preserves low-contrast detectability, which improves the contrast-to-noise ratio (CNR) and aids in detecting and characterizing lesions [17,18]. Moreover, IR can enable the use of reduced-dose CT, decrease noise and increase contrast in CT images [19][20][21]. ...
