bluuebunny/crossref_metadata_2025_split huggingface dataset:
Iatrogenic esophageal perforation with mediastinitis, multidisciplinary management: a case report
Authors: Mancera Juliana , Ariza Anibal M. , Pelaez Mauricio , Benavides Sebastian , Márquez Alfonso C. 
Published: October 2021

Acute mediastinitis is a low incidence pathology, but it is associated with a high mortality rate. Iatrogenic lesions are the most common cause of mediastinitis secondary to esophageal perforation. Early diagnosis and surgical treatment are the most important factors in the treatment of patients with this condition. 83-year-old female patient, with a history of left saphenectomy due to venous insufficiency with difficult intubation two days prior to the emergency consultation. She was admitted to the emergency room due to dyspnea, hemoptysis, chest pain, and right hemifacial edema. A chest tomography was performed with findings suggestive of esophageal perforation or airway injury. Later, in an upper digestive tract study, extravasation of the contrast medium was documented in the right posterolateral wall of the cervical esophagus with a collection in the middle mediastinum. The patient was taken for drainage of mediastinitis by right thoracoscopy and the presence of a perforation in the cervical esophagus was confirmed with an intraoperative endoscopy. Esophageal repair was performed, with drainage of the prevertebral space and the superior mediastinum by a left longitudinal cervicotomy. Postoperatively, she received antibiotic and enteral nutritional support by a nasojejunal tube. Low output fistula of the cervical esophagus, organized by a drain, was documented, which closed after 4 weeks of conservative management. Iatrogenic esophageal perforation with mediastinitis is a very rare entity with a high mortality. Early surgical treatment is the most important prognostic factor in patients with mediastinitis due to esophageal perforation.
In ferrets with hyperadrenocorticism, does use of deslorelin acetate implants compared to adrenalectomy result in a superior prognosis?
Authors: Ballman Megan 
Published: October 2021

PICO question
In ferrets with hyperadrenocorticism, does use of deslorelin acetate implants compared to adrenalectomy result in a superior prognosis?

Clinical bottom line
Category of research question
Treatment
The number and type of study designs reviewed
One study was reviewed, a retrospective cohort study that directly compared the outcomes of these treatments
Strength of evidence
Weak
Outcomes reported
The study found that in ferrets with hyperadrenocorticism, use of deslorelin acetate implants resulted in a longer average time to recurrence of clinical signs and a lower mortality rate than adrenalectomy. However, the strength of evidence for this study is weak and it has several design limitations
Conclusion
In view of the evidence, both deslorelin acetate implants and adrenalectomy are valid treatments for a ferret with hyperadrenocorticism, but it cannot be concluded based on the current literature that deslorelin acetate implants result in a superior prognosis

How to apply this evidence in practice
The application of evidence into practice should take into account multiple factors, not limited to: individual clinical expertise, patient’s circumstances and owners’ values, country, location or clinic where you work, the individual case in front of you, the availability of therapies and resources.
Knowledge Summaries are a resource to help reinforce or inform decision making. They do not override the responsibility or judgement of the practitioner to do what is best for the animal in their care.
PENGARUH STRATEGI PEMBELAJARAN BERBASIS PROYEK TERHADAP HASIL BELAJAR MATA PELAJARAN PEMROGRAMAN DASAR DI SMK TAMANSISWA 2 JAKARTA
Authors: Annisa Aprilianti  , Prasetyo W. Yunanto  , Bambang P. Adhi  
Published: October 2021

Penelitian dilakukan dengan tujuan mengetahui pengaruh strategi pembelajaran berbasis proyek dalam meningkatkan hasil belajar mata pelajaran Pemrograman Dasar peserta didik kelas X jurusan RPL SMK Tamansiswa 2 Jakarta. Penelitian dilakukan menggunakan metode Quasi-Experiment dengan model one group pretest-posttest dengan strategi Project-Based Learning sebagai variabel perlakukan dan hasil belajar kognitif mata pelajaran Pemrograman Dasar sebagai variabel terikat dengan sampel peneltian sebanyak 39 peserta didik kelas X jurusan RPL yang dilakukan pada bulan Maret sampai dengan Mei 2019. Pembelajaran untuk 4 pokok bahasan telah diterapkan menggunakan strategi PjBL di kelas eksperimen sebanyak 8 kali tatap-muka dengan menggunakan lembar kerja siswa (LKS) dan lembar observasi untuk memastikan semua peserta didik telah melaksanakan 6 langkah strategi Project-Based Learning dengan benar. Teknik pengumpulan data menggunakan instrumen tes pilihan ganda yang telah diuji validitas dan reliabilitasnya. Berdasarkan hasil perhitungan diperoleh data bahwa terjadi peningkatan skor rata-rata hasil belajar dari 30,79 (pretest) menjadi 36,95 (posttest) atau rata-rata kenaikan sebesar 6,16. Berdasarkan Paired sample t-test (uji kanan) diperoleh tHitung= 7,8224 dan dengan nilai t(Tabel(0,05;38)one-tail) sebesar 1,6860, sehingga tHitung>tTabel(α;df), maka H0 ditolak sehingga dapat disimpulkan bahwa strategi Project-Based Learning secara signifikan dapat meningkatkan hasil belajar mata pelajaran Pemrograman Dasar.
Anomalous Flexor Digitorum Profundus Muscle Bellies as a Cause of Snapping Wrist and Carpal Tunnel Syndrome
Authors: Falcon Spencer , Everist Brian , Brubacher Jacob 
Published: October 2021

Case:
A 20-year-old right hand dominant woman presented with an audible and painful snapping wrist occurring with finger flexion. This bothersome mechanical finding and concomitant carpal tunnel syndrome (CTS) did not resolve with conservative measures. Dynamic magnetic resonance imaging revealed anomalous flexor digitorum profundus (FDP) muscle bellies as the cause of the mechanical snapping and irritation of the median nerve. Carpal tunnel release and excision of anomalous muscle within the carpal tunnel and distal forearm provided complete resolution of symptoms.

Conclusion:
Anomalous muscle bellies of the FDP is a rare cause of a volar snapping wrist and CTS.
Paleozoic (Pre-Khuff Hydrocarbon Geology of the Ghawar Area, Eastern Saudi Arabia
Authors: Wender Lawrence E. , Bryant Jeffrey W. , Dickens Martin F. , Neville Allen S. , Al-Moqbel Abdulrahman M. 
Published: October 2021

ABSTRACT
Saudi Aramco is conducting an exploration program to discover additional non-associated gas reserves in the Ghawar Area. The program has successfully discovered significant sweet gas and condensate reserves in the pre-Khuff siliciclastics and has further increased our understanding of the Paleozoic petroleum system.
The Lower Permian Unayzah Formation is the principal pre-Khuff hydrocarbon reservoir in the Southern Ghawar Area, where it contains both oil and gas. The Unayzah consists of fluvial to marginal marine sandstones. The Devonian Jauf Formation is the principal pre-Khuff reservoir in the Northern Ghawar Area, where it hosts the recently discovered giant Hawiyah gas-condensate field. The Jauf consists of shallow marine sandstones that exhibit unusually high porosities considering the burial depths. The primary source rock for pre-Khuff hydrocarbons is the basal “hot shale” of the Lower Silurian Qalibah Formation. Maturation modeling of these shales indicates hydrocarbon generation began in the Middle Triassic (oil) and continues to the present (dry gas).
Pre-Khuff hydrocarbon traps are found in simple four-way closures as well as more complex structural-stratigraphic traps on the flanks of Hercynian structures. Trap formation and modification occurred in four main phases: (1) Carboniferous (Hercynian Orogeny); (2) Early Triassic (Zagros Rifting); (3) Late Cretaceous (First or Early Alpine Orogeny); and (4) Tertiary (Second or Late Alpine Orogeny). Structures in the Ghawar Area show differences in growth histories, which have impacted the amount and type of hydrocarbons contained.
Paleozoic Petroleum System of Central Saudi Arabia
Authors: Abu-Ali Mahdi A. , Rudkiewicz Jean-Luc L. , McGillivray Jim G. , Behar Françoise 
Published: October 2021

ABSTRACT
An integrated geochemical model was developed to reconstruct the history of expulsion, migration and entrapment of Paleozoic oil and gas in the main regional Permian Unayzah Sandstone Reservoir in Central Saudi Arabia. The model indicates that by the Late Jurassic, approximately 140 million years ago (Ma), the principal Paleozoic source rock, the Lower Silurian Qusaiba “hot” shale, was mature in the deepest hydrocarbon “kitchens”. Hydrocarbon expulsion started during the Aptian and Albian (late Early to early Middle Cretaceous, 100 to 120 Ma).
Expulsion of oil and gas is linked to three geochemical events. Primary kerogen cracking led to a first episode of expulsion about 120 Ma. Secondary heavy component and oil cracking resulted in a second episode of expulsion at approximately 100 Ma. Between 20 to 10 Ma, later uplift, and the resulting pressure drop in the source rock, led to a third expulsion phase. The first two expulsion episodes were gradual, whereas the third was more rapid and related to uplift of the Arabian Arch, opening of the Red Sea and the Zagros Orogeny during the Miocene. Expulsion of oil nearly terminated after the Late Cretaceous, while gas continued to be expelled, though at a lower rate, in the Tertiary. Peak gas expulsion occurred post Early Eocene with significant gas generation from secondary cracking of oil retained in the source rock.
Gas was sourced either directly from kerogen, or from secondary cracking of heavy absorbed components or non-migrated oils. The expulsion of gas coincides with oil expulsion for the first two episodes because the gas and oil formed as a single phase. As a result of Tertiary Uplift, gas separated from the oil and re-migrated in the final episode (20 to 10 Ma).
Geology and Production Significance of Dolomite, Arab-D Reservoir, Ghawar Field, Saudi Arabia
Authors: Cantrell David L. , Swart Peter K. , Handford Robertson C. , Kendall Christopher G. , Westphal Hildegard 
Published: October 2021

ABSTRACT
At least five distinct types of dolomite occur in the Arab-D Reservoir in Ghawar field, Saudi Arabia – one of which appears to be responsible for high flow or ‘super-k’. These dolomite types are distinct petrographically, geochemically and stratigraphically: a finely-crystalline non-fabric-preserving (NFP) variety of dolomite in the lower Arab-D (Zone 3) with low oxygen isotope values and generally poor reservoir quality;a medium-crystalline NFP dolomite with high oxygen isotope values and very poor reservoir quality in the upper Arab-D (Zone 2);a medium to coarsely-crystalline NFP dolomite with low oxygen isotopic values and very good reservoir quality (‘super-k’) occurring in Zone 2; anda finely-crystalline fabric-preserving (FP) dolomite in the uppermost Arab-D (Zone 1) that contains high oxygen isotope values and has generally fair to poor reservoir quality.
Previous studies have documented a rare fifth type of dolomite, baroque or ‘saddle’ dolomite, that occurs locally in the reservoir as well.
This study also quantified and mapped the abundance and distribution of dolomite across the field, using all available core and log data. Analysis of dolomite distribution map patterns reveals that dolomite occurs in Ghawar as a series of linear trends extending for tens’s of kilometers. These map pattern trends are best-developed in Zone 2B, but are also visible in Zones 2A and 3A as well. Baroque dolomite appears to be limited to a few areas of vertically pervasive dolomite occurring on the same trends of high dolomite content. The linearity of these dolomite trends strongly suggests that some structural element is responsible for controlling their orientation. We interpret these linear patterns to have formed in response to a series of fracturing and/or faulting events that allowed dolomitizing fluids to move up into the reservoir from below, and preferentially dolomitize there.
Both a qualitative and a quantitative analysis of performance data (flowmeters) in southern Ghawar (Haradh) indicate that these trends of high dolomite have a profound influence on fluid flow in the reservoir. A qualitative analysis of occurrences of ‘super-k’ in the Arab-D in Haradh suggests that most ‘super-k’ zones (seen as ‘spikes’ or step profiles on the flowmeter) occur in the high dolomite trend in Haradh. A quantitative analysis of flowmeter data and a comparison of this analysis with dolomite map patterns indicate that most reservoir flow occurs where dolomite is abundant, and suggests that there is a direct relationship between patterns of high flow and high dolomite.
Egypt in the Twenty-First Century: Petroleum Potential in Offshore Trends
Authors: Dolson John C. , Shann Mark V. , Matbouly Sayed I. , Hammouda Hussein , Rashed Rashed M. 
Published: October 2021

ABSTRACT
Since the onshore discovery of oil in the Eastern Desert in 1886, the petroleum industry in Egypt has accumulated reserves of more than 15.5 billion barrels of oil equivalent. An understanding of the tectono-stratigraphic history of each major basin, combined with drilling history and field-size distributions, justifies the realization of the complete replacement of these reserves in the coming decades. Most of the increase in reserves will be the result of offshore exploration.
In addition to the 25 trillion cubic feet already discovered, the offshore Mediterranean may hold 64 to 84 trillion cubic feet and the onshore Western Desert may contribute 15 to 30 trillion cubic feet in new gas resources. Many of the new fields are expected to be in the giant-field class that contains greater than 100 million barrels of oil equivalent. Challenges include sub-salt imaging, market constraints for predominantly gas resources and economic constraints imposed by the high cost of development of the current deep-water gas discoveries that are probably unique worldwide. The offshore Gulf of Suez may yield an additional 1.5 to 3.3 billion barrels of oil equivalent, but it continues to be technologically constrained by poor-quality seismic data. Advances in multiple suppression and development of new ‘off-structure’ play concepts with higher quality seismic data should result in continual new pool discoveries. Offshore frontier exploration includes the Red Sea rift (currently under reassessment with area-wide 3-D surveys) and the Gulf of Aqaba. Deep-water and sub-salt imaging remain significant challenges to be overcome.
Despite a relatively complex history, the Phanerozoic geological framework of Egypt is extremely prospective for oil and gas. Eight major tectono-stratigraphic events are: (1) Paleozoic craton; (2) Jurassic rifting; (3) Cretaceous passive margin; (4) Cretaceous Syrian Arc deformation and foreland transgressions; (5) Oligocene-Miocene Gulf of Suez rifting; (6) Miocene Red Sea opening; (7) the Messinian salinity crisis; and (8) Pliocene-Pleistocene delta progradation. Each of these events has created multiple reservoir and seal combinations. Source rocks occur from the Paleozoic through to the Pliocene and petroleum is produced from reservoirs that range in age from Precambrian to Pleistocene. The offshore Mediterranean, Gulf of Suez and Red Sea/Gulf of Aqaba contain significant exploration potential and will provide substantial reserve replacements in the coming decades.
Paleozoic Stratigraphy and Hydrocarbon Habitat of the Arabian Plate
Authors: Geert Konert , Afifi Abdulkader M. , Al-Hajri Sa’id A. , Droste Henk J. 
Published: October 2021

ABSTRACTThe Paleozoic section became prospective during the early 1970s when the enormous gas reserves in the Permian Khuff reservoirs were delineated in the Gulf and Zagros regions, and oil was discovered in Oman. Since then, frontier exploration has targeted the Paleozoic System throughout the Middle East, driven by various economic considerations. The Paleozoic sequences were essentially deposited in continental to deep marine clastic environments at the Gondwana continental margin. Carbonates only became dominant in the Late Permian. The sediments were deposited in arid to glacial settings, reflecting the drift of the region from equatorial to high southern latitudes and back. Following late Precambrian rifting that formed salt basins in Oman and the Arabian Gulf region, the Cambrian-Devonian sequences were deposited on a peneplained continental platform. The entire region was affected by the Hercynian Orogeny, which climaxed during the Carboniferous. The orogeny manifested itself in a change in basin geometry, inversion tectonics, regional uplift and tectonism along the Zagros fault zone. This deformation caused widespread erosion of the Devonian-Carboniferous and older sections, and was probably caused by collision along the northern margin of Gondwana. The Paleozoic tectonic super cycle ended with the onset of break-up tectonics in the Permian, and the deposition of Khuff carbonates over the newly formed eastern passive margin. A major Paleozoic petroleum system embraces reservoir seal pairs spanning the Silurian to Permian sequences. Hydrocarbons occur in a variety of traps, and are sourced by the Silurian ‘hot shale’. A second petroleum system occurs in areas charged from upper Precambrian source rocks in the salt basins. Hydrocarbon expulsion estimates, taking into account secondary migration losses, suggest that some one trillion barrels of oil equivalent (BOE) may have been trapped from the Silurian ‘hot shale’ alone. However, the long and complex hydrocarbon geological evolution of the basin, combined with low acoustic contrasts between target rock units, difficult surface conditions, tight reservoirs, and deep subsurface environments, posed significant challenges to exploration and development. The critical success factor is the continuous innovative effort of earth scientists and subsurface engineers to find integrated technology solutions, that will render the Paleozoic plays economically viable.
Exploration Strategy Development and Performance Management: a Portfolio-based Approach
Authors: Naylor Michael A. , Spring Laurent Y. 
Published: October 2021

ABSTRACT
In Petroleum Development Oman (PDO), the exploration opportunity portfolio is managed by a dedicated team responsible for its integrity and analysis. The team uses a customized suite of tools for volumetric and economic assessment that has been developed since 1997. In addition to their application in quality control, regular performance monitoring and reporting, the tools are used to determine annual finding targets and formulate exploration strategies.
The portfolio management process in PDO has made a major contribution to the quality of prospects that are selected for drilling. Thanks to new evaluation processes and a robust suite of tools, the company has a better understanding of the composition and quality of the prospect portfolio, and is explicitly aware of the challenges and issues facing exploration. Portfolio management tools enable objective target setting and communication, thereby achieving shared ownership. The clarity brought by portfolio analyses provides a powerful focus to the asset teams’ efforts to improve prospect quality.
PDO is also able to quantify the consequences of changing activity levels and balance in the program, and of the limitations imposed by the portfolio. These provide the basis for ongoing dialogue with shareholders and justify the strategy shift towards frontier exploration enacted since 1998. Exploration in PDO has shifted from being opportunity-driven to being led by a portfolio-based strategy. A similar approach may be suited to other exploration ventures with sizeable portfolios.
Sequence stratigraphy of Oxfordian and Kimmeridgian shelf carbonate reservoirs, offshore Abu Dhabi
Authors: Al-Suwaidi Ahmed S. , Aziz Sabah K. 
Published: October 2021

ABSTRACT
Carbonate reservoirs on the eastern flank of the Oxfordian-Kimmeridgian intrashelf basin in offshore Abu Dhabi had received little attention until commercial oil accumulations in structural traps were discovered in the late 1980s and early 1990s. In order to clarify the geometric and chronostratigraphic relationships of the Oxfordian-Kimmeridgian reservoirs, a multidisciplinary study (seismic, lithobiofacies, geochemistry, strontium isotope dating, and well-log data) was used to develop a sequence stratigraphic model.
After deposition of the Callovian upper Araej Formation, a differentiated carbonate platform was established in the early Oxfordian in offshore and western onshore Abu Dhabi. Tectonic subsidence coupled with sea-level fluctuations controlled the geometry, deposition, and distribution of the lithofacies. These ranged from organic-rich, limy mudstones in the basinal area, to porous and permeable bioclastic packstones, grainstones, and dolomites in shallow waters on the eastern flank of the intrashelf basin. The upper Kimmeridgian Arab-D Member of the Arab Formation overlies the basinal deposits.
Three third-order Depositional Sequences were identified in the offshore area. They are named according to their contained Maximum Flooding Surface; a fourth sequence is an intermediate unnamed Depositional Wedge. Depositional Sequence Jurassic 50 is of Oxfordian age and was deposited during transgressive and highstand periods. The lower Kimmeridgian Depositional Sequence Jurassic 60 is a well-defined lowstand system tract overlain by short-lived transgressive and highstand system tracts. Overlying Depositional Sequence Jurassic 60 is the Depositional Wedge. Finally, Depositional Sequence Jurassic 70 consists of transgressive and highstand system tracts developed on an undifferentiated platform that had localized depressions in the west. The best reservoir developments are in highstand bioclastic packstones and grainstones below the type-1 sequence boundaries that cap Depositional Sequences Jurassic 50 and Jurassic 60. The reservoir units have porosities greater than 20 percent and permeabilities of more than 1,000 milliDarcies. The basinal facies of Depositional Sequence Jurassic 50 have the best source-rock potential in the intrashelf basin.
Sequence stratigraphy, biostratigraphy and paleontology of the Maastrichtian-Paleocene Aruma Formation in outcrop in Saudi Arabia
Authors: Philip Jean M. , Roger Jack , Vaslet Denis , Cecca Fabrizio , Gardin Silvia , Memesh Abdullah M.S. 
Published: October 2021

ABSTRACT
The Aruma Formation is a predominantly carbonate lithostratigraphic unit of Late Cretaceous age that crops out in Saudi Arabia. It consists of three members: from base to top they are Khanasir Limestone Member, Hajajah Limestone Member, and Lina Shale Member. In order to establish a stratigraphic revision of the Formation, a reference section near Al Kharj, southeast of Riyadh in central Saudi Arabia, was logged and a hierarchical organization of the depositional sequences established. The Aruma corresponds to four third-order cycles bounded by erosional unconformities. Integrated biostratigraphical data mainly based on ammonites, nannoflora, rudists, and larger foraminifera point to a Maastrichtian age for the Khanasir and Hajajah members, and a Paleocene age for the Lina Member. Regional stratigraphic correlations were established within the outcropping Aruma Formation in Saudi Arabia. Biostratigraphy and sequence stratigraphy allowed a correlation framework to be proposed between the Aruma and the Qahlah and Simsima formations of the United Arab Emirates and the Oman Mountains, and with the Sharwayn Formation of the Hadramawt and Dhofar. The high-resolution stratigraphic scheme established for the Aruma Formation in Saudi Arabia is expected to be useful for subsurface correlations and in petroleum exploration.