bluuebunny/crossref_metadata_2025_split huggingface dataset:
Experience with echoendoscopy-guided drainage of post-surgical collections in a tertiary hospital
Authors: Martínez Burgos M , Angulo Mcgrath I , Pinto García I , Duran Campos A , Bracho Gonzalez M 
Published: August 2022

Resumen

El drenaje de colecciones intraabdominales postquirúrgicas guiado por ecoendoscopia es una técnica cada vez más utilizada en la práctica clínica. El objetivo de nuestro estudio es describir nuestra experiencia en el drenaje guiado por ecoendoscopia de colecciones postoperatorias intraabdominales. Para ello, se evaluó retrospectivamente los pacientes con colecciones postoperatorias sintomáticas que fueron sometidos a un drenaje guiado por ecoendoscopia en nuestro centro entre los años 2017 y 2022. Se realizaron 10 drenajes ecoguiados de colecciones postquirúrgicas en 9 pacientes. El éxito técnico fue del 100% y el éxito clínico del 80%. Ocurrieron complicaciones en el 20% de los casos, que se pudieron resolver eficazmente mediante endoscopia. En nuestra experiencia, el drenaje guiado por ecoendoscopia es una opción segura y eficaz en el drenaje de colecciones postoperatorias intraabdominales, con alta tasa de éxito técnico y clínico y un reducido porcentaje de complicaciones.
When ERCP is not possible: ultrasound endoscopy guided biliary drainage
Authors: Rosa Sánchez C , Lecuona Muñoz M , Redondo Cerezo E 
Published: August 2022

Resumen

La Colangiopancreatografía Retrógrada Endoscópica (CPRE) constituye la técnica de elección para el drenaje de la vía biliar, ya sea en casos de obstrucción biliar benigna o maligna. Sin embargo, una vez esta técnica no resulta eficaz o factible, tenemos a nuestra disposición varias alternativas, siendo la más utilizada hasta ahora la colangiografía transhepática percutánea (CTPH). Sin embargo, a día de hoy el drenaje biliar guiado por ecoendoscopia (USE-BD) constituye una alternativa cada vez más factible a la radiología intervencionista o la cirugía. En esta revisión se abordarán los resultados de este tipo de drenaje en comparación con los demás, así como los diferentes tipos de técnicas disponibles y sus resultados en la práctica clínica.
Jejunal angiodysplasia as a rare cause of gastrointestinal bleeding
Authors: Pérez Naranjo P , Cabrera Peña Á , Briones Bajaña F 
Published: August 2022

Resumen

La angiodisplasia del tracto gastrointestinal es una patología vascular rara que en ocasiones provoca una hemorragia masiva. Las angiodisplasias son particularmente difíciles de localizar en el intestino delgado debido a la dificultad de evaluarlo integralmente por razones anatómicas, lo que a menudo dificulta su diagnóstico y tratamiento. La localización de la lesión es un desafío importante en los casos de hemorragia del intestino delgado que suelen requieren intervención quirúrgica.

Describimos el caso de un paciente con angiodisplasia yeyunal tratado de manera exitosa mediante la combinación de embolización arterial selectiva previa a cirugía laparoscópica.
Cardiac invasian and massive thrombosis due to unknown hepatic mass
Authors: Pérez Naranjo P , Miras Ventura JA , Garrido Márquez I 
Published: August 2022

Resumen

Presentamos el caso de un varón de 74 años sin antecedentes de enfermedad hepática conocida que acudió a Urgencias por edematización progresiva de ambos miembros inferiores y distensión abdominal. Ante los datos analíticos de fallo hepático se realizó una tomografía computarizada (TC) abdominopélvica con contraste, evidenciando una gran masa hepática que invadía la vena cava inferior extendiéndose cranealmente hasta la aurícula derecha, formando un voluminoso trombo intracavitario. El paciente falleció por probable tromboembolismo pulmonar masivo tras tres días desde su ingreso hospitalario sin oportunidad de llegar al diagnóstico anatomopatológico definitivo del mismo.
3D Hydrodynamics of Pre-supernova Outbursts in Convective Red Supergiant Envelopes
Authors: Tsang Benny T.-H. , Kasen Daniel , Bildsten Lars 
Published: August 2022

Abstract
Eruptive mass loss likely produces the energetic outbursts observed from some massive stars before they become core-collapse supernovae (SNe). The resulting dense circumstellar medium may also cause the subsequent SNe to be observed as Type IIn events. The leading hypothesis of the cause of these outbursts is the response of the envelope of the red supergiant (RSG) progenitor to energy deposition in the months to years prior to collapse. Early theoretical studies of this phenomenon were limited to 1D, leaving the 3D convective RSG structure unaddressed. Using FLASH's hydrodynamic capabilities, we explore the 3D outcomes by constructing convective RSG envelope models and depositing energies less than the envelope binding energies on timescales shorter than the envelope dynamical time deep within them. We confirm the 1D prediction of an outward-moving acoustic pulse steepening into a shock, unbinding the outermost parts of the envelope. However, we find that the initial 2–4 km s−1 convective motions seed the intrinsic convective instability associated with the high-entropy material deep in the envelope, enabling gas from deep within the envelope to escape and increasing the amount of ejected mass compared to an initially “quiescent” envelope. The 3D models reveal a rich density structure, with column densities varying by ≈10× along different lines of sight. Our work highlights that the 3D convective nature of RSG envelopes impacts our ability to reliably predict the outburst dynamics, the amount, and the spatial distribution of the ejected mass associated with deep energy deposition.
Distributed YSOs in the Perseus Molecular Cloud from the Gaia and LAMOST Surveys
Authors: Wang Xiao-Long , Fang Min , Gao Yu , Zhang Hong-Xin , Herczeg Gregory J. , Ma Hong-Jun , Chen En , Zhou Xing-Yu 
Published: August 2022

Abstract
Identifying the young optically visible population in a star-forming region is essential for fully understanding the star formation event. In this paper, we identify 211 candidate members of the Perseus molecular cloud based on Gaia astrometry. We use LAMOST spectra to confirm that 51 of these candidates are new members, bringing the total census of known members to 856. The newly confirmed members are less extincted than previously known members. Two new stellar aggregates are identified in our updated census. With the updated member list, we obtain a statistically significant distance gradient of 4.84 pc deg−1 from west to east. Distances and extinction corrected color–magnitude diagrams indicate that NGC 1333 is significantly younger than IC 348 and the remaining cloud regions. The disk fraction in NGC 1333 is higher than elsewhere, consistent with its youngest age. The star formation scenario in the Perseus molecular cloud is investigated and the bulk motion of the distributed population is consistent with the cloud being swept away by the Per-Tau Shell.
3D Selection of 167 Substellar Companions to Nearby Stars
Authors: Feng Fabo , Butler R. Paul , Vogt Steven S. , Clement Matthew S. , Tinney C. G. , Cui Kaiming , Aizawa Masataka , Jones Hugh R. A. , Bailey J. , Burt Jennifer , Carter B. D. , Crane Jeffrey D. , Dotti Francesco Flammini , Holden Bradford , Ma Bo , Ogihara Masahiro , Oppenheimer Rebecca , O’Toole S. J. , Shectman Stephen A. , Wittenmyer Robert A. , Wang Sharon X. , Wright D. J. , Xuan Yifan 
Published: August 2022

Abstract
We analyze 5108 AFGKM stars with at least five high-precision radial velocity points, as well as Gaia and Hipparcos astrometric data, utilizing a novel pipeline developed in previous work. We find 914 radial velocity signals with periods longer than 1000 days. Around these signals, 167 cold giants and 68 other types of companions are identified, through combined analyses of radial velocity, astrometry, and imaging data. Without correcting for detection bias, we estimate the minimum occurrence rate of the wide-orbit brown dwarfs to be 1.3%, and find a significant brown-dwarf valley around 40 M
Jup. We also find a power-law distribution in the host binary fraction beyond 3 au, similar to that found for single stars, indicating no preference of multiplicity for brown dwarfs. Our work also reveals nine substellar systems (GJ 234 B, GJ 494 B, HD 13724 b, HD 182488 b, HD 39060 b and c, HD 4113 C, HD 42581 d, HD 7449 B, and HD 984 b) that have previously been directly imaged, and many others that are observable at existing facilities. Depending on their ages, we estimate that an additional 10–57 substellar objects within our sample can be detected with current imaging facilities, extending the imaged cold (or old) giants by an order of magnitude.
The Effect of Vitamin B6 in the Prevention of Hematological Adverse Effects of Linezolid in Patients with Chronic Osteomyelitis
Authors: Shirani Kiana , Khorvash Farzin , Soltani Rasool , Ataie Behrooz , Tarrahi Mohammad Javad , Fallah Farideh 
Published: August 2022

Background:
Due to the contradictory results of the effects of Vitamin B6 in reducing the hematotoxic effects of linezolid, the present study aimed to investigate the possible role of Vitamin B6 administration in reducing linezolid-related hematological toxicities in patients with chronic osteomyelitis.

Materials and Methods:
In a randomized double-blind placebo-controlled clinical trial, patients with chronic osteomyelitis were randomly divided into two groups (n = 40 each): the intervention group received Vitamin B640 mg twice daily from the beginning of treatment with linezolid and the control group received placebo with linezolid, both for 21 days. Blood variables including hemoglobin (Hb), white blood cells (WBC), and platelets (PLT) were measured at baseline and at the end of the 1st, 2nd, and 3rd weeks (days 7, 14, and 21) of the intervention.

Results:
There was no significant difference between the groups regarding the count of WBC and PLT and level of Hb at evaluated time points. Furthermore, there was a significant decreasing trend in all parameters within both groups; however, the decreasing trend of both PLT and WBC was slower in the intervention (Vitamin B6) group compared to the placebo group.

Conclusion:
Vitamin B6 has no significant effect in the reduction of hematological adverse effects of linezolid in chronic osteomyelitis patients. However, it could retard the decreasing trend of WBC and PLT counts.
Infected Nonunion of the Humerus Treated by the Compression Distraction Ilizarov Technique Without Radical Debridement or Bone Excision
Authors: Meselhy Mohammed Anter , Elhammady Adel Samy , Hosny Gamal Ahmed 
Published: August 2022

Background:
External fixators have been proved to be effective in the treatment of infected nonunion fracture humerus. The current study presents the outcome of treatment of infected nonunion of the humerus by a cyclic compression distraction technique using Ilizarov without radical debridement.

Materials and Methods:
32 patients, 19 males and 13 females. The mean age of the patients was 39.72 years (range, 27–54); patients were presented by infected nonunited fracture humerus after an average of 1.9 surgeries (range, 1–4). All patients were treated by removal of the hardware if present without radical debridement or bone resection to avoid bone shortening and to preserve the blood supply of the bone and soft tissue, Ilizarov application with cyclic compression distraction.

Results:
The mean time of the external fixator application was 179.06 days, and the mean follow-up time was 32.8 months. All patients were united, According to the association for the study and application of the method of the ilizarov scoring system, the functional results were excellent in 8 patients, good in 16, fair in 7, and poor in only 1 patient. The bone results were excellent in 9 patients, good in 16, fair in 5, and poor in 2 patients. The mean post-operative DASH score was 32.43 (range, 10–63), the mean visual analog scale (VAS) score for pain was 3.71 (range: 2–5), while the mean VAS score for satisfaction was 7.41 (range: 6–9).

Conclusion:
Cyclic compression distraction by Ilizarov without radical debridement had shown a satisfactory outcome in the treatment of infected nonunion humerus.

Level of Evidence:
IV, A retrospective study.
Residual Amputee Limb Segment Lengthening
Authors: Chavan Anuj Sharad , Al Muderis Munjed , Tetsworth Kevin , Rustamov Ilkhomjon D , Hoellwarth Jason Shih 
Published: August 2022

Aims:
This study aimed to systematically review the indications, techniques, complications, and insights identified for lower extremity residual amputee limb segment lengthening.

Methods:
Searches in PubMed, Google Scholar, Ovid Medline, Ovid Embase, and the Journal of Limb Lengthening and Reconstruction were performed using terms including “amputee,” “residual limb,” and “stump” combined with “lengthening,” “distraction,” “histogenesis,” “osteogenesis,” and “Callotasis.” Included articles described lengthening amputated tibias or femurs (other segments excluded). The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were utilized. Descriptive statistics were performed.

Results:
Twenty-two studies reported lengthening 32 femurs and 31 tibias (63 total segments). Fifteen articles described a single segment, five described two to four (15 total segments), and two described five or more (31 total segments). Lengthening was performed to improve prosthesis fit (21/22 studies, 54/63 segments) or to optimize osseointegration (1/22 studies, 9/63 segments) and utilized an external fixator (52/63) or a motorized intramedullary nail (11/63). Femurs were lengthened an average of 7.7 ± 2.5 cm (60% ± 23%) and tibias 5.8 ± 1.8 cm (97% ± 53%) from a starting length of 12.5 ± 4.6 cm for femurs and 6.7 ± 2.3 cm for tibias. The most common minor problem was pin site infection. The most common major problem was over-lengthening bone beyond the soft tissue envelope, requiring flap coverage, bone excision, or knee disarticulation.

Conclusions:
Amputee lengthening can achieve measurable gains to improve prosthesis use. Over-lengthening can be difficult to manage, if not catastrophic. Osseointegration may be a further rehabilitation solution for amputees struggling with prosthesis problems and willing to consider surgical options.
Focal Dome Condylar Osteotomy
Authors: Bhadiyadra Ravi , Apte Aditya P. , Chaudhary Milind 
Published: August 2022

Background and Aims:
Extra-articular high tibial osteotomies reliably treat varus deformities seen in medial compartment osteoarthritis of knee (MCOA). Recently, attention has turned to the detection and treatment of intra-articular knee deformity to treat MCOA. Tibial condylar valgus osteotomy (TCVO) is an intra-articular osteotomy (IAO) that corrects the varus by elevating the medial tibial condyle and is fixed with a plate. TCVO improves joint line convergence angle (JLCA), spine edge angle (SEA), and spine vertical distance (SVD), which measure intra-articular deformity. It may undercorrect the mechanical axis to <50%. Focal dome condylar osteotomy (FDCO) is recently described and claims to correct both the intra- and extra-articular deformities in MCOA. We aimed to study the immediate results of FDCO and compare its efficacy with TCVO.

Patients and Methods:
We performed ten FDCO procedures on ten patients over the last year. The mean age was 57 years. We compared the results with a similar retrospective cohort of ten TCVO patients.

Results:
The mean preoperative (bo) mechanical axis deviation (MAD) in FDCO was −13.8% and improved to 51.6%. TCVO group had a similar mean postoperative (po) MAD of 43.5% (P = 0.38). Although 6 of 10 FDCOs had MAD >50%, only two of TCVOs crossed the midline. The mean bo medial proximal tibial angle in FDCO was 85.9° and improved significantly po to 93°. Hip knee ankle angle, ankle joint line orientation, and knee joint line orientation improved significantly as did JLCA, SEA, and SVD. Condylar plateau angle did not change.

Conclusion:
FDCO is an IAO with a vertical limb that passes through the lateral tibial spine and a medial curved limb. This single osteotomy can correct the intra-articular and extra-articular varus deformity. Although there was no significant difference in the correction of intra- and extra-articular deformity parameters between FDCO and TCVO, we feel that it was part of our learning curve. FDCO has the potential for better correction of the mechanical axis along with intra-articular deformities.
Intramedullary Limb Lengthening
Authors: Maai Nader , Bernstorff Maria Alexandra , Koenigshausen Matthias , Schildhauer Thomas Armin , Ferreira Nando 
Published: August 2022

Background:
Intramedullary limb lengthening has become more popular in the past two decades. This study aimed to investigate the mechanical properties of the various intramedullary lengthening devices currently available to orthopedic surgeons.

Materials and Methods:
A load cell connected to an electromechanical tensile testing machine was used to apply a bending force to nine intramedullary lengthening nails: Albizzia Ø 11 mm, intramedullary skeletal kinetic distractor Ø 10.7 mm, Precice Ø 10.7 mm, G-Nail Ø 13 mm, and Betzbone Ø 9 mm to Ø 13 mm. The force needed to deform each nail by 0.01 mm, 0.05 mm, 1 mm, and 3 mm was measured and compared.

Results:
The nail with the smallest diameter (Betzbone Ø 9 mm) needed the least force to deform. The nails with the biggest diameter (G-Nail Ø 13 mm and Betzbone Ø 13 mm) needed the most force to deform. Comparing similar-sized implants, nails manufactured from surgical steel or cobalt-chrome were more resistant to plastic deformation than titanium nails.

Conclusion:
Intramedullary lengthening device's ability to resist bending deformation depends on the diameter and material of the nail. Surgical steel and cobalt-chrome alloy nails showed higher resistant to plastic deformation when compared to titanium nails.
A Linear Regression Model Using Computed Tomography of Forearm Osteology to Predict Radius and Ulna Characteristics for Surgical Planning
Authors: Pretorius Henry Sean , Ferreira Nando , Burger Marilize Cornelle 
Published: August 2022

Introduction:
The radius and ulna are commonly fractured bones. The restoration of the native anatomy is the primary surgical objective but can be difficult due to a mismatch between the bones' shape and available implants. A thorough understanding of the underlying anatomical relationships between the radius and ulna could allow for a more accurate prediction of variables, thus enabling the surgeon to treat patients more effectively.

Methods:
A cross-sectional investigation of forearm computed tomography scans and measurements were conducted on 97 forearms. Pearson's correlations were used to evaluate relationships between variables, and those with a coefficient of r > 0.4 and P < 0.001, as well as those considered clinically relevant, were carried forward into a multiple linear regression for each outcome variable, namely: (i) radius length, (ii) radius of curvature, (iii) the minimum diameter of the radial canal, (iv) ulna length, and (v) the minimum diameter of the ulna canal. A stepwise approach was used for the multiple linear regression analysis, with a significance level of 0.05 for predictor variables.

Results:
Radius length: in the multiple linear regression model, only ulna length remained in the model (adjusted R
2 = 0.85). The radius of curvature: the final model only included ulna length (adjusted R
2 = 0.30). Radius canal minimum width: three measurements were included in the final model (adjusted R
2 = 0.82). Ulna Length: six independent correlations between individual measurements and the ulna length were observed, with radius length and the radial neck length being included in the final model (adjusted R
2 = 0.86). Ulna canal minimum width: the final regression model included four variables: the maximum diameter of the distal third of the radial canal, the minimum diameter of the radial canal, and the minimum diameter of the proximal and middle third aspects of the ulna canal (adjusted R
2 = 0.80).

Conclusion:
The results of this investigation illustrate that anatomical predictions for bone size can be made using other anatomical landmarks except for the radius of curvature. The clinical application and implementation of this statistical model need further research.
Hydrosurgical Debridement of Grade VI External Fixator Pin Site Infection
Authors: Saini Aaron Kumar , Grey J. P. , Venter Rudolph , Ferreira Nando 
Published: August 2022

Background:
Pin site infection is a common complication with external fixation, with a reported incidence of 26%–71% in the context of limb reconstruction. The Checketts and Otterburn (C&O) classification is frequently used, with minor infections (C&O I–III) treated with pin site care and enteral antibiotics. Major infections (C&O IV–VI) require removal of the infected pin or fine wire. Surgical debridement is indicated where the infection persists following pin removal (C&O grade VI). The Versajet hydrosurgery system (Smith & Nephew, Memphis, Tennessee) utilizes a saline jet to debride biological tissue.

Methods:
A retrospective review was conducted on all patients who underwent Versajet hydrosurgery debridement with C&O grade VI pin site infections between January 2011 and January 2021. Data regarding patient demographics, fixator type, indication for the initial surgery, and treatment outcome were recorded.

Results:
The cohort comprised seven males (87.5%) and one female (12.5%) with a mean age of 41.4 years ± 17.74 (range 16–61). Mean follow-up was 11.8 months ± 6.2 (range 7–25). The mean time in external fixator was 155 days ± 85.19 (range 83–354), and the mean time between fixator removal and Versajet debridement was 46 days ± 33.83 (range 3–116). No perioperative complications were experienced, and all patients (n = 8, 100%) were found to be infection-free at the last clinical review, with healed overlying soft tissue.

Conclusion:
The Versajet hydrosurgical debridement system is effective in managing C&O grade VI pin site infections. The method is reproducible and provides long-term clearance of infection, allowing subsequent soft tissue healing.