In situ femorodistal bypass: Novel technique for angioscope-assisted intraluminal side-branch occlusion and valvulotomy. A preliminary report

1991 ◽  
Vol 78 (11) ◽  
pp. 1376-1378 ◽  
Author(s):  
P. Stierli ◽  
P. Aeberhard
Keyword(s):  
Preliminary Report ◽  
Side Branch ◽  
Novel Technique

scholarly journals A Penetrometer for Quantifying the Surface Stiffness of Sport Sand Surfaces

Proceedings ◽  
2020 ◽  
Vol 49 (1) ◽  
pp. 64 ◽  
Author(s):  
David V. Thiel ◽  
Matthew T. O. Worsey ◽  
Florian Klodzinski ◽  
Nicholas Emerson ◽  
Hugo G. Espinosa
Keyword(s):  
Soft Tissue Injuries ◽  
Beach Sand ◽  
Depth Of Penetration ◽  
Future Studies ◽  
Novel Technique ◽  
Sand Box ◽  
Surface Stiffness ◽  
Fitness Training ◽  
The Relationship

Sand sports include running, volleyball, soccer, beach flags, ironman, and fitness training. An increased amount of soft tissue injuries have been widely reported. A novel technique of determining the surface stiffness of beach sand in-situ used a simple drop-test penetrometer. The relationship between drop height and the depth of penetration squared was linear (Pearson’s correlation coefficient r2 > 0.92). The stiffness ratio between the soft dry sand and ocean-saturated wet sand compacted by eight hours of coastal water exposure was approximately seven, which was similar to previously reported stiffness measurements in a sand box. However, the absolute stiffness values were much smaller. While this technique was manually operated, an automatic system is postulated for future studies.

Formation of Sub-100 NM GE Wires on Si by E-Beam Evaporation/Lithography

1995 ◽  
Vol 380 ◽  
Author(s):  
C. Deng ◽  
J. C. Wu ◽  
C. J. Barbero ◽  
T. W. Sigmon ◽  
M. N. Wybourne
Keyword(s):  
Cross Section ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Si Substrates ◽  
Novel Technique ◽  
Atomic Force ◽  
Transmission Electron ◽  
First Time ◽  
Scanning Electron

ABSTRACTA fabrication process for sub-100 nm Ge wires on Si substrates is reported for the first time. Wires with a cross section of 6 × 57 nm2 are demonstrated. The wire structures are analyzed by atomic force (AFM), scanning electron (SEM), and transmission electron microscopy (TEM). Sample preparation for TEM is performed using a novel technique using both pre and in situ deposition of multiple protection layers using a Focused Ion Beam (FIB) micromachining system.

Excavation of the Lower Palaeolithic Site at Amey's Eartham Pit, Boxgrove, West Sussex: A Preliminary Report.

1986 ◽  
Vol 52 ◽  
pp. 215-245 ◽  
Author(s):  
M. B. Roberts ◽  
M. R. Bates ◽  
C. Bergman ◽  
A. P. Currant ◽  
J. R. Haynes ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Preliminary Report ◽  
Site Formation ◽  
Middle Pleistocene ◽  
Site Formation Processes ◽  
Formation Processes ◽  
Environmental Reconstruction ◽  
Multidisciplinary Research ◽  
Lower Palaeolithic

The acheulian site at Boxgrove contains one of the most extensive areas of in situ fauna and flintwork yet discovered in Britain. This material is found in a complex sequence of sediments which represent depositional conditions from a 42 m sea level rise to the onset of a full periglacial climate. Excavation of the archaeological horizon has been accompanied by a programme of multidisciplinary research examining site formation processes, palaeolandscape and palaeoecological development, using sedimentological and environmental reconstruction techniques. Dating of the site is tentative as no absolute dates are available at present. However, comparative analysis with other British sites would suggest a position for the Boxgrove sequence within the Middle Pleistocene. The archaeological horizon is interpreted as being deposited towards the latter part of an interglacial or an interstadial period.

scholarly journals Endovascular assisted in situ bypass grafting: a simplified technique for saphenous vein side branch occlusion

2003 ◽  
Vol 38 (4) ◽  
pp. 856-858 ◽  
Author(s):  
Sean D O'Donnell ◽  
David L Gillespie ◽  
Benjamin W Starnes ◽  
Mary V Parker ◽  
Chatt A Johnson ◽  
...  
Keyword(s):  
Saphenous Vein ◽  
Side Branch ◽  
Bypass Grafting ◽  
In Situ Bypass

A Novel Technique for Measuring Pedicle Screw Forces In Situ

2008 ◽  
Author(s):  
Samuel Q. Tia ◽  
Jennifer M. Buckley ◽  
Thuc-Quyen Nguyen ◽  
Jeffrey C. Lotz ◽  
Shane Burch
Keyword(s):  
Pedicle Screw ◽  
Pedicle Screws ◽  
Clinical Failure ◽  
Strain Gages ◽  
Destructive Testing ◽  
Novel Technique ◽  
Pull Out ◽  
Pull Out Strength

Long posterior fusion constructs in the lumbar spine cause substantial posteriorly directed loading of the supporting pedicle screws, particularly during patient bending activities. Although there are numerous documented accounts of clinical failure at the pedicle screw-bone interface [1,2], the in situ pull-out strength of pedicle screws in long surgical constructs has not been characterized. Previous biomechanical studies have quantified pedicle screw pull-out force in cadaveric models through destructive testing or in nondestructive cases, through the use of custom-machined pedicle screws instrumented with strain gages [3–6]. However, these techniques involve altering screw geometry and may fail to properly simulate in vivo mechanical loading conditions. The goal of this study was to develop and validate a sensor system for measuring pedicle screw pull-out forces in long posterior constructs in situ during multi-segmental cadaveric testing.

A novel servo-control system that imposes desired aortic input impedance on in situ rat heart

2000 ◽  
Vol 278 (3) ◽  
pp. H998-H1007 ◽  
Author(s):  
Hiroshi Miyashita ◽  
Masaru Sugimachi ◽  
Takayuki Sato ◽  
Toru Kawada ◽  
Toshiaki Shishido ◽  
...  
Keyword(s):  
Control System ◽  
Characteristic Impedance ◽  
Aortic Pressure ◽  
Side Branch ◽  
Aortic Flow ◽  
Aortic Input Impedance ◽  
Aortic Impedance ◽  
The Difference ◽  
Flow Waveforms

To clarify the pathophysiological role of dynamic arterial properties in cardiovascular diseases, we attempted to develop a new control system that imposes desired aortic impedance on in situ rat left ventricle. In 38 anesthetized open-chest rats, ascending aortic pressure and flow waveforms were continuously sampled (1,000 Hz). Desired flow waveforms were calculated from measured aortic pressure waveforms and target impedance. To minimize the difference between measured and desired aortic flow waveforms, the computer generated commands to the servo-pump, connected to a side branch of the aorta. By iterating the process, we could successfully control aortic impedance in such a way as to manipulate compliance and characteristic impedance between 60 and 160% of their respective native values. The error between desired and measured aortic flow waveforms was 70 ± 34 μl/s (root mean square; 4.4 ± 1.4% of peak flow), indicating reasonable accuracy in controlling aortic impedance. This system enables us to examine the importance of dynamic arterial properties independently of other hemodynamic and neurohumoral factors in physiological and clinical settings.

PRAISOS V: A PRELIMINARY REPORT ON THE 2007 EXCAVATION SEASON

2011 ◽  
Vol 106 ◽  
pp. 3-45
Author(s):  
James Whitley
Keyword(s):  
Preliminary Report ◽  
Floor Level ◽  
Almond Tree ◽  
Terminus Post Quem ◽  
The City

This is a report on the excavations undertaken in 2007 at the site of Praisos in eastern Crete. Three trenches were opened just next to the so-called Andreion or Almond Tree House on the NW slopes of the First Acropolis, excavated by R.C. Bosanquet in 1901. The upper layers of two of these trenches (A-200 and A-300) consisted of re-deposited material of Classical and Hellenistic date, which we infer came from Bosanquet's dump. Material from these upper layers comprised tile, pottery (including numerous examples of Cretan necked cups), loomweights and terracotta plaques with a distinct masculine iconography. Excavation also reached lower Late-Classical–Hellenistic floor levels, on which a number of pithoi survived in situ. Some of these pithoi are considerably older than the floor level, a terminus post quem for which is provided by a bronze coin. The abandonment of these houses must be dated to the final phases of Praisos' occupation, before 146 bc. There is however nothing to suggest that the city itself was subject to a fire destruction. Rather, the city seems to have undergone a forced abandonment followed by deliberate demolition.

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