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https://www.readbyqxmd.com/read/28108262/deceased-organ-donor-management-does-hospital-volume-matter
#1
Madhukar S Patel, Jahan Mohebali, Mitchell Sally, Tahnee Groat, Parsia A Vagefi, David C Chang, Darren J Malinoski
BACKGROUND: Identification of strategies to improve organ donor utilization remains imperative. Despite the association between hospital volume and outcomes for many common disease processes, there have been no studies to assess the impact of organ donor hospital volume on organ yield. STUDY DESIGN: A prospective observational study of all deceased organ donors managed by ten OPOs across UNOS Regions 4, 5, and 6 was conducted from February 2012-June 2015. In order to study the impact of hospital volume on organ yield, each donor was placed into a hospital volume quartile based on the number of donors managed by their hospital...
December 16, 2016: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/28072757/organ-procurement-organization-survey-of-practices-and-beliefs-regarding-prerecovery-percutaneous-liver-biopsy-in-donation-after-neurologic-determination-of-death
#2
Joseph Benton Oliver, Andrea Fleisch Marcus, Mark Paster, Joseph Nespral, Advaith Bongu, George Dikdan, Lloyd Brown, Nikole Neidlinger, Baburao Koneru
BACKGROUND: Prerecovery liver biopsy (PLB) allows histological evaluation of the organ prior to procurement. The opinions and what factors might influence PLB use within Organ Procurement Organizations (OPOs) are unknown. METHODS: A survey instrument was distributed by the Association of OPOs to the clinical directors of all 58 OPOs. Descriptive statistics were calculated. Results were also stratified based on OPO characteristics. RESULTS: 84...
January 9, 2017: Transplantation
https://www.readbyqxmd.com/read/28059367/harmonically-pumped-femtosecond-optical-parametric-oscillator-with-multi-gigahertz-repetition-rate
#3
Wenlong Tian, Zhaohua Wang, Jiangfeng Zhu, Zhiyi Wei
We report a multi-gigahertz (GHz) repetition-rate femtosecond MgO:PPLN optical parametric oscillator (OPO) harmonically pumped by a 75.6 MHz Kerr-lens mode-locked Yb:KGW laser. By fractionally increasing the OPO cavity length, we obtained OPO operation up to the 493rd harmonic of the pump laser repetition rate, corresponding to a repetition rate as high as 37.3 GHz. Using a 1.5% output coupler, we are able to extract signal pulses with up to 260 mW average power at the 102nd harmonic (7.7 GHz) and 90 mW at the 493rd harmonic (37...
December 26, 2016: Optics Express
https://www.readbyqxmd.com/read/28059345/spectrum-regulation-for-mid-infrared-ultrafast-pulses-via-a-time-synchronization-aperiodically-poled-linbo-sub-3-sub
#4
Haizhe Zhong, Fen Qin, Jianlong Yang, Lifu Zhang, Changwen Xu, Ying Li, Dianyuan Fan
Restricted to temporal separation during the coupled-waves interaction, aperiodically quasi-phase-matching (QPM) nonlinear crystals are primarily implemented for prechirped pulses, showing limited applications in ultrafast temporal scale. Under the proposed time-synchronization framework, pump and signal waves travel with identical group-velocity, which permits sustaining energy transfer in long aperiodically poled LiNbO<sub>3</sub> crystals (APPLN) even with ultrafast pulse duration. With the help of this structure, adiabatic frequency conversion shows extra advantages compared with the common cases, which enables lower stretching ratio and smoother gain spectrum...
December 26, 2016: Optics Express
https://www.readbyqxmd.com/read/28042747/csm-2017-orthopaedic-section-poster-presentations-abstracts-opo1-opo243
#5
(no author information available yet)
These abstracts are presented here as prepared by the authors. The accuracy and content of each abstract remain the responsibility of the authors. In the identification number above each abstract, OPO designates an Orthopaedic Section poster presentation. J Orthop Sports Phys Ther 2017;47(1):A58-A161. doi:10.2519/jospt.2017.47.1.A58.
January 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28018761/improving-donor-conversion-rates-at-a-level-one-trauma-center-impact-of-best-practice-guidelines
#6
Rodrigo F Alban, Bobby L Gibbons, Vanessa L Bershad
BACKGROUND: Organ availability is a consistently limiting factor in transplant surgery. A primary driver of this limitation is donor conversion rate, which is defined as the percentage of eligible donors for whom procurement is actually performed. An alternative way to increase organ availability is through improved utilization of organs from donors after cardiac death (DCD). Recently, a concerted, multidisciplinary effort has been made within our system to improve conversion rates and DCD utilization, thus increasing organ availability...
November 22, 2016: Curēus
https://www.readbyqxmd.com/read/28005896/fiber-laser-based-high-repetition-rate-picosecond-ultraviolet-source-tunable-across-329-348%C3%A2-%C3%A2-nm
#7
Kavita Devi, S Chaitanya Kumar, M Ebrahim-Zadeh
We report a compact, fiber-laser-based, high-repetition-rate picosecond source for the ultraviolet (UV), providing multi-tens of milliwatt of average power across 329-348 nm. The source is based on internal sum-frequency-generation (SFG) in a singly resonant optical parametric oscillator (OPO), synchronously pumped at 532 nm by the second harmonic of a picosecond Yb-fiber laser at 80 MHz repetition rate. Using a 30-mm-long single-grating MgO:sPPLT crystal for the OPO and a 5-mm-long BiB<sub>3</sub>O<sub>6</sub> crystal for intracavity SFG, we generate up to 115 mW of average UV power at 339...
October 15, 2016: Optics Letters
https://www.readbyqxmd.com/read/28003943/envisioning-and-leading-organizational-transformation-one-organ-procurement-organization-s-journey
#8
Jeffrey P Orlowski
BACKGROUND:  In 2012, one organ procurement organization (OPO) welcomed a new President and Chief Executive Officer (CEO). This OPO, LifeShare Transplant Donor Services of Oklahoma (LifeShare), had just celebrated its 25th anniversary in 2011. While LifeShare was well-established chronologically, growth in organ donors and organs transplanted from these donors had occurred at a much slower rate during the collaborative era and afterward (2003-2011) than the donor/transplant growth the United States (US), as a whole, had experienced...
November 15, 2016: Curēus
https://www.readbyqxmd.com/read/27984519/the-importance-and-utility-of-hemoglobin-a1c-levels-in-the-assessment-of-donor-pancreas-allografts
#9
Emre Arpali, Joseph R Scalea, Robert R Redfield, Lynn Berg, Dixon Kaufman, Hans W Sollinger, Bridget Welch, Glen Leverson, Jon S Odorico
BACKGROUND: Hemoglobin A1C (HbA1c) levels are often obtained in potential pancreas graft donors to assess the overall long-term functional glycemic control or the possibility of unrecognized diabetes. Although routinely measured, the impact of donor HbA1c levels on pancreas graft outcomes has not been reported. Here, we researched the relationship between donor HbA1c levels and postoperative pancreas graft survival. METHODS: Data from 266 pancreas transplant patients including 182 simultaneous kidney-pancreas and 84 pancreas alone transplants were reviewed for the study...
December 14, 2016: Transplantation
https://www.readbyqxmd.com/read/27982508/regional-differences-in-communication-process-and-outcomes-of-requests-for-solid-organ-donation
#10
H M Traino, A J Molisani, L A Siminoff
Although federal mandate prohibits the allocation of solid organs for transplantation based on "accidents of geography," geographic variation of transplantable organs is well documented. This study explores regional differences in communication in requests for organ donation. Administrative data from 9 partnering Organ Procurement Organizations and interview data from 1,339 family decision makers (FDMs) were compared across 8 geographically distinct US donor service areas (DSA). Authorization to organ donation ranged from 60...
December 16, 2016: American Journal of Transplantation
https://www.readbyqxmd.com/read/27977900/non-eligible-donors-as-a-strategy-to-decrease-the-organ-shortage
#11
Kristopher P Croome, David D Lee, Andrew P Keaveny, Burcin C Taner
OPO performance is generally evaluated by the number of organ procurement procedures divided by the number of eligible deaths (brain dead donors under age 70), while the number of non-eligible deaths (including: donation after cardiac death donors and brain dead donors over the age of 70) is not tracked. The present study aimed to investigate the variability in the proportion of non-eligible liver donors by the 58 DSAs. Patients undergoing LT between 2011-2015 were obtained from the UNOS STAR file. LT were compared between those coming from non-eligible and eligible donors...
December 15, 2016: American Journal of Transplantation
https://www.readbyqxmd.com/read/27958555/electro-optically-spectrum-narrowed-multiline-intracavity-optical-parametric-oscillators
#12
W K Chang, H P Chung, Y Y Chou, R Geiss, S D Yang, T Pertsch, Y H Chen
We report on the first building of an active spectral narrowing mechanism in a pulsed, multiline optical parametric oscillator (OPO) based on a novel aperiodically poled lithium niobate (APPLN) device constructed using the aperiodic optical superlattice technique. The APPLN device functions simultaneously in the system as a multi-channel optical parametric down converter (OPDC) and an electro-optic (EO) gain spectral filter working on the corresponding (multiple) signal bands. When the APPLN OPO was installed in a diode pumped Nd:YVO<sub>4</sub> laser system, highly narrowed dual-wavelength signal lines (at 1540 and 1550 nm) were observed at the output of the system through EO control of the APPLN...
December 12, 2016: Optics Express
https://www.readbyqxmd.com/read/27958548/creation-and-measurement-of-broadband-squeezed-vacuum-from-a-ring-optical-parametric-oscillator
#13
Takahiro Serikawa, Jun-Ichi Yoshikawa, Kenzo Makino, Akira Frusawa
We report a 65 MHz-bandwidth triangular-shaped optical parametric oscillator (OPO) for squeezed vacuum generation at 860 nm. The triangle structure of our OPO enables the round-trip length to reach 45 mm as a ring cavity, which provides a counter circulating optical path available for introducing a probe beam or generating another squeezed vacuum. Hence our OPO is suitable for the applications in high-speed quantum information processing where two or more squeezed vacua form a complicated interferometer, like continuous-variable quantum teleportation...
December 12, 2016: Optics Express
https://www.readbyqxmd.com/read/27956257/a-report-on-extensive-lateral-genetic-reciprocation-between-arsenic-resistant-bacillus-subtilis-and-bacillus-pumilus-strains-analyzed-using-rapd-pcr
#14
Sapna Khowal, Md Zulquarnain Siddiqui, Shadab Ali, Mohd Taha Khan, Mather Ali Khan, Samar Husain Naqvi, Saima Wajid
The study involves isolation of arsenic resistant bacteria from soil samples. The characterization of bacteria isolates was based on 16S rRNA gene sequences. The phylogenetic consanguinity among isolates was studied employing rpoB and gltX gene sequence. RAPD-PCR technique was used to analyze genetic similarity between arsenic resistant isolates. In accordance with the results Bacillus subtilis and Bacillus pumilus strains may exhibit extensive horizontal gene transfer. Arsenic resistant potency in Bacillus sonorensis and high arsenite tolerance in Bacillus pumilus strains was identified...
December 10, 2016: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/27906775/improving-liver-allocation-using-optimized-neighborhoods
#15
Vikram Kilambi, Sanjay Mehrotra
BACKGROUND: Geographic disparities persist in access to liver transplantation. Candidates with similar urgency experience varying opportunities for transplants across the US. Policymakers are poised to act and 1 proposal entails reorganizing the current OPTN of 11 regions into 8 districts. However, redistricting has the shortcomings that OPOs are disconnected from their immediate neighbors by district borders and that it is not easily responsive to uncertainty resulting from variability in donor and listing rates...
October 7, 2016: Transplantation
https://www.readbyqxmd.com/read/27906530/medicare-program-hospital-outpatient-prospective-payment-and-ambulatory-surgical-center-payment-systems-and-quality-reporting-programs-organ-procurement-organization-reporting-and-communication-transplant-outcome-measures-and-documentation-requirements-electronic
#16
(no author information available yet)
This final rule with comment period revises the Medicare hospital outpatient prospective payment system (OPPS) and the Medicare ambulatory surgical center (ASC) payment system for CY 2017 to implement applicable statutory requirements and changes arising from our continuing experience with these systems. In this final rule with comment period, we describe the changes to the amounts and factors used to determine the payment rates for Medicare services paid under the OPPS and those paid under the ASC payment system...
November 14, 2016: Federal Register
https://www.readbyqxmd.com/read/27864444/simultaneous-burst-imaging-of-dual-species-using-planar-laser-induced-fluorescence-at-50%C3%A2-khz-in-turbulent-premixed-flames
#17
Zheming Li, Joakim Rosell, Marcus Aldén, Mattias Richter
Spatially and temporally resolved measurements are of great importance in turbulent premixed flame studies, especially when investigating rapid processes such as when flame local extinction, re-ignition, or flashback occur in a reacting flow. Here, an experimental approach for simultaneously probing two different species at high frame rates (50 kHz) is presented by employing a multi-YAG laser system. The laser radiation at 355 nm generated by a multi-YAG laser system was split into two beam paths: one beam for exciting formaldehyde and the other for pumping an optical parametric oscillator (OPO)...
November 18, 2016: Applied Spectroscopy
https://www.readbyqxmd.com/read/27857386/compact-self-cascaded-kta-opo-for-2-6-%C3%AE-m-laser-generation
#18
Yanmin Duan, Haiyong Zhu, Changwen Xu, Xiukai Ruan, Guihua Cui, Yaoju Zhang, Dingyuan Tang, Dianyuan Fan
We reported a compact self-cascaded KTA-OPO source for 2.6 μm coherent light generation. The OPO is driven in a diode end-pumped and Q-switched Nd:YVO<sub>4</sub> laser cavity. Two OPO processes occurred in the same KTA crystal with non-critical phase matching. At an incident diode pump power of 8.7 W and a pulse repetition frequency of 60 kHz, the OPO can generate a maximum average output power of 445 mW at 2.59 μm. The slope efficiency was about 12.7%, and the power fluctuation was less than 8%...
November 14, 2016: Optics Express
https://www.readbyqxmd.com/read/27829613/quantification-of-triacylglycerol-positional-isomers-in-rat-milk
#19
Natsuko Watanabe, Toshiharu Nagai, Hoyo Mizobe, Kazuaki Yoshinaga, Akihiko Yoshida, Yohei Kitamura, Takashi Shimizu, Fumiaki Beppu, Naohiro Gotoh
The absolute amount of triacylglycerol (TAG) positional isomers was analyzed in rat milk fat, a representative of non-ruminant milk fat, using a HPLC-UV-atmospheric pressure chemical ionization-MS/MS system equipped with an octacosyl silylation column or polymeric ODS column. TAGs consisting of two oleic acids (O) and one palmitic acid (P) were the most abundant. In particular, β-OPO, a TAG binding P at the β-position (sn-2) and two Os at the α-positions (sn-1/3), was prominent. The β-OPO content decreased over time, while a TAG consisting of two Ps and one capric acid, a medium-chain fatty acid, increased...
December 1, 2016: Journal of Oleo Science
https://www.readbyqxmd.com/read/27828399/widely-tunable-high-repetition-rate-terahertz-generation-in-gase-with-a-compact-dual-wavelength-ktp-opo-around-2-%C3%AE-m
#20
Jialin Mei, Kai Zhong, Maorong Wang, Yang Liu, Degang Xu, Wei Shi, Yuye Wang, Jianquan Yao, Robert A Norwood, Nasser Peyghambarian
A compact efficient high-repetition-rate doubly-resonant dual-wavelength KTP optical parametric oscillator (OPO), with output power up to 3.65 W and tuning ranges of 2.088-2.133 μm/2.171-2.122 μm for signal/idler waves, was deployed for terahertz (THz) generation in a GaSe crystal. Based on difference frequency generation (DFG), the THz wave was continuously tunable from 730.9 μm (0.41 THz) to 80.8 μm (3.71 THz), believed to be the first report of a compact high-repetition-rate widely-tunable THz source...
October 3, 2016: Optics Express
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