Publications by authors named "Kristina Kramer"

Background: Metastatic prostate cancer remains a therapeutic challenge. Based on data of the STAMPEDE trial, patients with a low metastatic burden showed prolonged failure-free and overall survival when treated with prostate radio therapy (RT) in addition to standard of care (SOC). The objective of this study was to determine the cost-effectiveness of additional prostate RT compared to SOC alone for following subgroups: non-regional lymph node (NRLN) metastases, up to three bone metastases and four or more bone metastases.

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Purpose: The proPSMA trial at ten Australian centers demonstrated increased sensitivity and specificity for PSMA PET/CT compared to conventional imaging regarding metastatic status in primary high-risk prostate cancer patients. A cost-effectiveness analysis showed benefits of PSMA PET/CT over conventional imaging for the Australian setting. However, comparable data for other countries are lacking.

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Introduction: There are currently no reports on whether telementoring for extended focused assessment with sonography for trauma (eFAST) improves critical care transport providers' performance in prehospital settings. Our objective was to determine the impact of teleguidance on eFAST performance and quantify workload experience.

Methods: Eight trauma injury modules were selected on simulated patients.

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Background: Metastatic castration-resistant prostate cancer poses a therapeutic challenge with poor prognosis. The VISION trial showed prolonged progression-free and overall survival in patients treated with lutetium Lu 177 vipivotide tetraxetan (177Lu-PSMA-617) radioligand therapy compared with using the standard of care (SoC) alone. The objective of this study was to determine the cost-effectiveness of 177Lu-PSMA-617 treatment compared with SoC therapy.

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Article Synopsis
  • - PsiD is an enzyme that starts the process of making psilocybin, a key ingredient in magic mushrooms, and is being explored as a treatment for depression.
  • - Unlike other similar enzymes that require vitamin B6 (PLP) to function, PsiD operates without it and is similar to another enzyme involved in breaking down phosphatidylserine.
  • - The study provided detailed lab results on PsiD from the Psilocybe cubensis mushroom and used computer modeling to understand its structure, confirming a unique mechanism for activating the enzyme.
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On space missions one must consider the operating cost of the medical system on crew time. Medical Officer Occupied Time (MOOT) may vary significantly depending on provider skill. This pilot study assessed the MOOT Skill Effect (MOOTSkE).

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With the increase in crewed commercial spaceflight and expeditions to the Moon and Mars, the risk of critical surgical problems and need for procedures increases. Appendicitis and appendectomy are the most common surgical pathology and procedure performed, respectively. The habitable volume of current spacecraft ranges from 4 m³ (Soyuz) to 425 m³ (International Space Station).

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Background: Many trauma patients currently transferred from rural and community hospitals (RCH) to Level I trauma centers (LITC) for trauma surgery evaluation may instead be appropriate for immediate discharge or admission to the local facility after evaluation by a trauma and acute care surgery (TACS) surgeon. Unnecessary use of resources occurs with current practice. We aimed to demonstrate the feasibility and acceptance of a teletrauma surgery consultation service between LITC and RCH.

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Pore-spanning membranes (PSMs) are a versatile tool to investigate membrane-confined processes in a bottom-up approach. Pore sizes in the micrometer range are most suited to visualize PSMs using fluorescence microscopy. However, the preparation of these PSMs relies on the spreading of giant unilamellar vesicles (GUVs).

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Background Laparoscopic cholecystectomy performed less than 72 hours from hospital admission for acute cholecystitis has shown to decrease hospital cost without an increase in length of stay (LOS). Very few studies have examined clinical and cost outcomes of performing cholecystectomy less than 24 hours from hospital admission. The aim of this study was to examine the cost and LOS of laparoscopic cholecystectomy performed on an early (less than 24 hours from admission) and late (more than 24 hours from hospital admission) basis.

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Objective: Previous studies on helicopter emergency medical service (HEMS) pilots found a positive correlation among fatigue, nodding off in flight, and accidents. We sought to quantify the amount of sleepiness in HEMS pilots using the Epworth Sleepiness Scale (ESS).

Methods: An anonymous survey was sent via the National EMS Pilots Association emergency medical services listserv including demographics, the ESS, and subjective effects of fatigue on flying.

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Objective: The objective of this paper was to outline a novel model created for the management of the critical care surge due to coronavirus disease 2019 (COVID-19) in a Western Massachusetts hospital.

Setting: This model was created and implemented at a Western Massachusetts Level 1 Trauma and tertiary referral center.

Conclusions: This article outlines a model devised by an interdisciplinary team for rapid expansion of critical care services by increasing allocated space, staffing, and supplies via modifications of existing systems of care to accommodate a predicted large critical care patient surge due to the COVID-19 pandemic.

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Introduction: The endpoint of resuscitative interventions after traumatic injury resulting in cardiopulmonary arrest varies across institutions and even among providers. The purpose of this study was to examine survival characteristics in patients suffering torso trauma with no recorded vital signs (VS) in the emergency department (ED).

Methods: The National Trauma Data Bank was analyzed from 2007 to 2015.

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Background: The recognition of the relationship between volume and outcomes led to the regionalization of trauma care. The relationship between trauma mechanism-subtype and outcomes has yet to be explored. We hypothesized that trauma centers with a high volume of penetrating trauma patients might be associated with a higher survival rate for penetrating trauma patients.

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Passive proton translocation across membranes through proton channels is generally measured with assays that allow a qualitative detection of the H-transfer. However, if a quantitative and time-resolved analysis is required, new methods have to be developed. Here, we report on the quantification of pH changes induced by the voltage-dependent proton channel Hv1 using the commercially available pH-sensitive fluorophore Oregon Green 488-DHPE (OG488-DHPE).

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Background: Screening for blunt cerebrovascular injuries (BCVIs) in asymptomatic high-risk patients has become routine. To date, the length of this asymptomatic period has not been defined. Determining the time to stroke could impact therapy including earlier initiation of antithrombotics in multiply injured patients.

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Extracellular ATP, adenosine (Ado), and adenosine plus homocysteine (Ado/HC) cause apoptosis of cultured pulmonary artery endothelial cells through the enhanced formation of intracellular S-adenosylhomocysteine and disruption of focal adhesion complexes. Because an increased intracellular ratio of S-adenosylhomocysteine/S-adenosylmethionine favors inhibition of methylation, we hypothesized that Ado/HC might act by inhibition of isoprenylcysteine-O-carboxyl methyltransferase (ICMT). We found that N-acetyl-S-geranylgeranyl-L-cysteine (AGGC) and N-acetyl-S-farnesyl-L-cysteine (AFC), which inhibit ICMT by competing with endogenous substrates for methylation, caused apoptosis.

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