1.Imaging small animal models of epileptogenesis
Bianca Jupp ; John Williams ; David Binns ; Rodney Hicks ; Terence O’Brien
Neurology Asia 2007;12(Supplement 1):51-54
In-vivo neuroimaging of small animal models of epilepsy offers the ability to serially examine the
progressive structural and functional changes that occur during the development of chronic epilepsy
(i.e. epileptogenesis). Such approaches allow the correlation of imaging findings to the etiology,
development, progression, treatment and prognosis of epilepsy in animal models, associations that are
poorly understood clinically. MRI and PET imaging of the kindling and kainic acid models of TLE
have begun to piece together the relationship of structural and functional changes in the brain during
epileptogenesis and their relationship to seizure and histological outcomes.
2.Liquid Levodopa/Carbidopa: Old Solution, Forgotten Complication.
Nirosen VIJIARATNAM ; Shuli CHENG ; Kelly Lucinda BERTRAM ; David Richard WILLIAMS
Journal of Movement Disorders 2017;10(3):164-165
No abstract available.
Carbidopa
;
Levodopa
;
Memory Disorders
;
Chromatography, High Pressure Liquid
3.Placement of Peripherally Inserted Central Catheters (PICC): The Upper Arm Approach.
Jae Hoon LIM ; Jung Hwan YOON ; Sung Wook CHOO ; In Wook CHOO ; Dong II CHOI ; Jae Woong HWANG ; James C ANDREWS ; David M WILLIAMS ; Kyung J CHO
Journal of the Korean Radiological Society 1995;33(6):861-864
PURPOSE: To evaluate a recently developed technique to place a medium-duration(weeks to months) central venous access. MATERIALS AND METHODS: Within three-year period, 635 patients were referred to interventional radiology suite for placement of peripherally inserted central catheter(PlCC). Contrast medium was injected into the peripheral intravenous line and a puncture was made into the opacified vein near the junction of the middle and upper thirds of the upper arm, either the brachial or basilic vein under fluoroscopic guidance. A 5.5-French peel-away sheath was inserted into the vein and a 5- French silicone catheter was introduced with its distal tip to the junction of the right atrium and superior vena cava. RESULTS: Catheter placement was successful in all patients unless there was a central venous obstruction. Catheters were maintained from 2 days to 5 months with a mean of 3 weeks. Complications included infection requiring removal of the PICC in 16 patients(2.5%), acute thrombosis of the subclavian vein in 3(0.5%). Occluded catheters in 4 patients were easily cleared with urokinase in place. CONCLUSION: The PICC system is an excellent option for medium-duration cen- tral venous access. Patients were able to carry on normal activities with the catheters in place.
Arm*
;
Catheters*
;
Heart Atria
;
Humans
;
Ocimum basilicum
;
Punctures
;
Radiology, Interventional
;
Silicones
;
Subclavian Vein
;
Thrombosis
;
Urokinase-Type Plasminogen Activator
;
Veins
;
Vena Cava, Superior
4.Placement of Peripherally Inserted Central Catheters (PICC): The Upper Arm Approach.
Jae Hoon LIM ; Jung Hwan YOON ; Sung Wook CHOO ; In Wook CHOO ; Dong II CHOI ; Jae Woong HWANG ; James C ANDREWS ; David M WILLIAMS ; Kyung J CHO
Journal of the Korean Radiological Society 1995;33(6):861-864
PURPOSE: To evaluate a recently developed technique to place a medium-duration(weeks to months) central venous access. MATERIALS AND METHODS: Within three-year period, 635 patients were referred to interventional radiology suite for placement of peripherally inserted central catheter(PlCC). Contrast medium was injected into the peripheral intravenous line and a puncture was made into the opacified vein near the junction of the middle and upper thirds of the upper arm, either the brachial or basilic vein under fluoroscopic guidance. A 5.5-French peel-away sheath was inserted into the vein and a 5- French silicone catheter was introduced with its distal tip to the junction of the right atrium and superior vena cava. RESULTS: Catheter placement was successful in all patients unless there was a central venous obstruction. Catheters were maintained from 2 days to 5 months with a mean of 3 weeks. Complications included infection requiring removal of the PICC in 16 patients(2.5%), acute thrombosis of the subclavian vein in 3(0.5%). Occluded catheters in 4 patients were easily cleared with urokinase in place. CONCLUSION: The PICC system is an excellent option for medium-duration cen- tral venous access. Patients were able to carry on normal activities with the catheters in place.
Arm*
;
Catheters*
;
Heart Atria
;
Humans
;
Ocimum basilicum
;
Punctures
;
Radiology, Interventional
;
Silicones
;
Subclavian Vein
;
Thrombosis
;
Urokinase-Type Plasminogen Activator
;
Veins
;
Vena Cava, Superior
5.Diagnostic and Prognostic Circulating MicroRNA in Acute Stroke: A Systematic and Bioinformatic Analysis of Current Evidence
Jorin BEJLERI ; Elisabeth JIRSTRÖM ; Paul DONOVAN ; David J. WILLIAMS ; Shona PFEIFFER
Journal of Stroke 2021;23(2):162-182
Background:
and Purpose Stroke is the second leading cause of death and disability worldwide and its diagnosis, and assessment of prognosis, remains challenging. There is a need for improved diagnostic and prognostic biomarkers. MicroRNAs (miRNAs) play important roles in the post-transcriptional regulation of gene expression and their secretion and remarkable stability in biofluids highlights their potential as sensitive biomarkers in the diagnosis and prognosis of acute stroke.
Methods:
We carried out a systematic review to assess current evidence supporting the potential of miRNAs to act as unique diagnostic and prognostic biomarkers in blood samples collected from patients suffering acute stroke within 24 hours of symptoms onset.
Results:
We identified 22 studies eligible for inclusion with 33 dysregulated miRNAs having diagnostic potential in the acute phase of the disease. We identified miR-16, miR-126, and miR-335 as having the highest sensitivity as diagnostic and prognostic biomarkers in acute ischaemic stroke and present original bioinformatic and pathway enrichment analysis of putative miRNA–target interactions.
Conclusions
miRNAs represent unique biomarkers which have a promising future in stroke diagnosis and prognosis. However, there is a need for more standardized and consistent methodology for the accurate interpretation and translation of miRNAs as novel specific and sensitive biomarkers into clinical practice.
6.Prospective Characterization of Cognitive Function in Typical and ‘Brainstem Predominant'Progressive Supranuclear Palsy Phenotypes
Young Eun C LEE ; David R WILLIAMS ; Jacqueline F I ANDERSON
Journal of Movement Disorders 2018;11(2):72-77
OBJECTIVE: Clinicopathological studies over the last decade have broadened the clinical spectrum of progressive supranuclear palsy (PSP) to include several distinct clinical syndromes. We examined the cognitive profiles of patients with PSP-Richardson's syndrome (PSP-RS) and two atypical ‘brainstem predominant' PSP phenotypes (PSP-parkinsonism, PSP-P; and PSP-pure akinesia with gait freezing, PSP-PAGF) using a comprehensive neuropsychological battery. METHODS: Fourteen patients diagnosed as PSP-RS, three patients with PSP-P and four patients with PSP-PAGF were assessed using a comprehensive battery of neuropsychological tests.
Cognition
;
Executive Function
;
Freezing
;
Gait
;
Humans
;
Neuropsychological Tests
;
Neuropsychology
;
Paralysis
;
Phenotype
;
Prospective Studies
;
Supranuclear Palsy, Progressive
7.Diagnostic and Prognostic Circulating MicroRNA in Acute Stroke: A Systematic and Bioinformatic Analysis of Current Evidence
Jorin BEJLERI ; Elisabeth JIRSTRÖM ; Paul DONOVAN ; David J. WILLIAMS ; Shona PFEIFFER
Journal of Stroke 2021;23(2):162-182
Background:
and Purpose Stroke is the second leading cause of death and disability worldwide and its diagnosis, and assessment of prognosis, remains challenging. There is a need for improved diagnostic and prognostic biomarkers. MicroRNAs (miRNAs) play important roles in the post-transcriptional regulation of gene expression and their secretion and remarkable stability in biofluids highlights their potential as sensitive biomarkers in the diagnosis and prognosis of acute stroke.
Methods:
We carried out a systematic review to assess current evidence supporting the potential of miRNAs to act as unique diagnostic and prognostic biomarkers in blood samples collected from patients suffering acute stroke within 24 hours of symptoms onset.
Results:
We identified 22 studies eligible for inclusion with 33 dysregulated miRNAs having diagnostic potential in the acute phase of the disease. We identified miR-16, miR-126, and miR-335 as having the highest sensitivity as diagnostic and prognostic biomarkers in acute ischaemic stroke and present original bioinformatic and pathway enrichment analysis of putative miRNA–target interactions.
Conclusions
miRNAs represent unique biomarkers which have a promising future in stroke diagnosis and prognosis. However, there is a need for more standardized and consistent methodology for the accurate interpretation and translation of miRNAs as novel specific and sensitive biomarkers into clinical practice.
8.Frequency and Outcome of Neuroleptic Rotation in the Management of Delirium in Patients with Advanced Cancer.
Seong Hoon SHIN ; David HUI ; Gary CHISHOLM ; Jung Hun KANG ; Julio ALLO ; Janet WILLIAMS ; Eduardo BRUERA
Cancer Research and Treatment 2015;47(3):399-405
PURPOSE: The response to haloperidol as a first-line neuroleptic and the pattern of neuroleptic rotation after haloperidol failure have not been well defined in palliative care. The purpose of this study was to determine the efficacy of haloperidol as a first-line neuroleptic and the predictors associated with the need to rotate to a second neuroleptic. MATERIALS AND METHODS: We conducted a retrospective review of the charts of advanced cancer patients admitted to our acute palliative care unit between January 2012 and March 2013. Inclusion criteria were a diagnosis of delirium and first-line treatment with haloperidol. RESULTS: Among 167 patients with delirium, 128 (77%) received only haloperidol and 39 (23%) received a second neuroleptic. Ninety-one patients (71%) who received haloperidol alone improved and were discharged alive. The median initial haloperidol dose was 5 mg (interquartile ranges [IQR], 3 to 7 mg) and the median duration was 5 days (IQR, 3 to 7 days). The median final haloperidol dose was 6 mg (IQR, 5 to 7 mg). A lack of treatment efficacy was the most common reason for neuroleptic rotation (87%). Significant factors associated with neuroleptic rotation were inpatient mortality (59% vs. 29%, p=0.001), and being Caucasian (87% vs. 62%, p=0.014). Chlorpromazine was administered to 37 patients (95%) who were not treated successfully by haloperidol. The median initial chlorpromazine dose was 150 mg (IQR, 100 to 150 mg) and the median duration was 3 days (IQR, 2 to 6 days). Thirteen patients (33%) showed reduced symptoms after the second neuroleptic. CONCLUSION: Neuroleptic rotation from haloperidol was only required in 23% of patients with delirium and was associated with inpatient mortality and white race.
Chlorpromazine
;
Continental Population Groups
;
Delirium*
;
Diagnosis
;
Haloperidol
;
Humans
;
Inpatients
;
Mortality
;
Palliative Care
;
Retrospective Studies
;
Treatment Outcome
9.Outcomes of Bilateral Shoulder Arthroplasties: A Comparison of Bilateral Total Shoulder Arthroplasties and Bilateral Reverse Shoulder Arthroplasties
Ryan Matthew COX ; Tyler James BROLIN ; Eric Michael PADEGIMAS ; Mark David LAZARUS ; Charles Lonnie GETZ ; Matthew Lee RAMSEY ; Gerald Ross WILLIAMS ; Joseph Albert ABBOUD
Clinics in Orthopedic Surgery 2019;11(3):316-324
BACKGROUND: The purpose of this study was to compare outcomes of patients who underwent bilateral total shoulder arthroplasties (TSAs) for osteoarthritis (OA) versus bilateral reverse shoulder arthroplasties (RSAs) for cuff tear arthropathy (CTA). METHODS: Inclusion criteria were patients who underwent bilateral TSAs for OA or bilateral RSAs for CTA with at least 2 years of follow-up. Twenty-six TSA patients (52 shoulders) were matched 2 to 1 with 13 RSA patients (26 shoulders) by sex, age at first surgery, and time between surgeries. Outcomes measured were shoulder range of motion (ROM), complications, and patient-reported scores. RESULTS: Preoperatively, TSA patients had significantly better forward elevation (FE) of both shoulders than RSA patients (dominant side [Dom]: 103° ± 32° vs. 81° ± 31°, p = 0.047; nondominant side [non-Dom]: 111° ± 28° vs. 70° ± 42°, p = 0.005) without significant differences in external (ER) or internal rotation (IR). Postoperatively, TSA patients had significantly better FE (Dom and non-Dom: 156° ± 12°, 156° ± 14° vs. 134° ± 24°, 137° ± 23°; p = 0.006, p = 0.019) and ER (42° ± 11°, 43° ± 10° vs. 24° ± 12°, 25° ± 10°; p < 0.001, p < 0.001) bilaterally and IR of their dominant arm (L1 vs. L4, p = 0.045). TSA patients had significantly better activities of daily living external and internal rotations (ADLEIR) scores (Dom and non-Dom: 35.3 ± 1.0, 35.5 ± 0.9 vs. 32.1 ± 2.4, 32.5 ± 2.2; p = 0.001, p = 0.001), American Shoulder and Elbow Surgeons scores (94.2 ± 8.4, 94.2 ± 8.2 vs. 84.7 ± 10.0, 84.5 ± 8.0; p = 0.015, p = 0.004), and Single Assessment Numerical Evaluation (SANE) scores (93.5 ± 7.6, 93.8 ± 11.8 vs. 80.5 ± 14.2, 82.3 ± 13.1; p = 0.014, p = 0.025), with no significant difference in visual analog scale pain scores (0.4 ± 1.0, 0.3 ± 1.0 vs. 0.7 ± 1.3, 0.8 ± 1.2) bilaterally. CONCLUSIONS: Overall, patients with bilateral TSAs and RSAs exhibited improved ROM and patient-reported outcomes. Those with bilateral TSAs had better functional outcomes than those with bilateral RSAs.
Activities of Daily Living
;
Arm
;
Arthroplasty
;
Elbow
;
Follow-Up Studies
;
Humans
;
Osteoarthritis
;
Range of Motion, Articular
;
Shoulder
;
Surgeons
;
Tears
;
Visual Analog Scale
10.The First Meeting of the National Control Laboratories for Vaccines and Biologicals in the Western Pacific in 2016.
Hokyung OH ; Jinho SHIN ; Manabu ATO ; Xiao MA ; David WILLIAMS ; Kiwon HAN ; Yang Jin KIM ; Hyunggoo KANG ; Kikyung JUNG ; Kentaro HANADA ; Masaki OCHIAI ; Pham VAN HUNG ; Sangmi PARK ; Chiyoung AHN
Osong Public Health and Research Perspectives 2017;8(1):91-103
The first meeting of the National Control Laboratories for Vaccines and Biologicals in the Western Pacific Region was held on September 1–2, 2016 in Seoul, the Republic of Korea. The meeting objectives were to share results of current research and to promote collaboration between the National Control Laboratories. To this end, we first discussed each country’s current status of research on quality control of biologicals. Next, we reviewed quality control of snake venom and antivenom production and the progress of a collaborative study on the Korean reference standard candidate for snake venom. We also discussed the establishment of the second regional reference standard antivenom and the characterization of the Vero cell genome landscape and its application to quality control. Moreover, we also reflected on the importance of collaboration among interested parties participating in this meeting. In conclusion, the meeting initiated networking between the national control laboratories in the Western Pacific region and paved the way to continue collaboration, which will eventually improve the region’s capacity for quality control of biologicals.
Cooperative Behavior
;
Genome
;
Quality Control
;
Republic of Korea
;
Seoul
;
Snake Venoms
;
Vaccines*
;
Vero Cells