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Reducing the unexpectedly high rate of injuries caused by NOTES gastrotomy creation.
Sohn, Dae Kyung,Turner, Brian G,Gee, Denise W,Willingham, Field F,Sylla, Patricia,Cizginer, Sevdenur,Konuk, Yusuf,Brugge, William R,Rattner, David W Springer International 2010 Surgical endoscopy Vol.24 No.2
<P>Despite the wide range of natural orifice transluminal endoscopic surgery (NOTES) procedures reported to date using a transgastric endoscopic approach, complications associated with gastrotomy creation have not been described. This study was conducted to identify the incidence and types of complications related to gastrotomy creation with the needle knife puncture and balloon dilatation technique for NOTES access to the peritoneal cavity.</P>
Bernardo de Andrada Pereira,Anna G.U. Sawa,Jakub Godzik,Jennifer N. Lehrman,Juan S. Uribe,Jay D. Turner,Brian P. Kelly 대한척추신경외과학회 2021 Neurospine Vol.18 No.3
Objective: The lordotic shape of the lumbar spine differs substantially between individuals. Measuring and recording strain during spinal biomechanical tests is an effective method to infer stresses on spinal implants and predict failure mechanisms. The geometry of the spine may have a significant effect on the resultant force distribution, thereby directly affecting rod strain. Methods: Seven fresh-frozen cadaveric specimens (T12-sacrum) underwent standard (7.5 Nm) nondestructive sagittal plane tests: flexion and extension. The conditions tested were intact and pedicle screws and rods (PSR) at L1-sacrum. The posterior right rod was instrumented with strain gauges between L3–4 (index level) and the L5–S1 pedicle screw. All specimens underwent lateral radiographs before testing. Lordotic angles encompassing different levels (L5–S1, L4–S1, L3–S1, L2–S1, and L1–S1) were measured and compared with rod strain. Data were analyzed using Pearson correlation analyses. Results: Strong positive correlations were observed between lordosis and posterior rod strain across different conditions. The L3–S1 lordotic angle in the unloaded intact condition correlated with peak rod strain at L3–4 with PSR during flexion (R=0.76, p=0.04). The same angle in the unloaded PSR condition correlated with peak strain in the PSR condition during extension (R=-0.79, p=0.04). The unloaded intact L2–S1 lordotic angle was significantly correlated with rod strain at L3–4 in the PSR condition during flexion (R=0.85, p=0.02) and extension (R=-0.85, p=0.02) and with rod strain at L5–S1 in the PSR condition during flexion (R=0.84, p=0.04). Conclusion: Lordosis measured on intact and instrumented conditions has strong positive correlations with posterior rod strain in cadaveric testing.
Sylla, Patricia,Sohn, Dae Kyung,Cizginer, Sevdenur,Konuk, Yusuf,Turner, Brian G,Gee, Denise W,Willingham, Field F,Hsu, Maylee,Mino-Kenudson, Mari,Brugge, William R,Rattner, David W Springer International 2010 Surgical endoscopy Vol.24 No.8
<P>The feasibility of transanal rectosigmoid resection with transanal endoscopic microsurgery (TEM) was previously demonstrated in a swine nonsurvival model in which transgastric endoscopic assistance also was shown to extend the length of colon mobilized transanally.</P>
Bernardo de Andrada Pereira,Jennifer N. Lehrman,Anna G.U. Sawa,Piyanat Wangsawatwong,Jakub Godzik,David S. Xu,Jay D. Turner,Brian P. Kelly,Juan S. Uribe 대한척추신경외과학회 2022 Neurospine Vol.19 No.3
Objective: The high mechanical stress zone at the sudden transition from a rigid to flexible region is involved in proximal junctional kyphosis (PJK) physiopathology. We evaluated the biomechanical performance of polyetheretherketone (PEEK) rods used as a nontraditional long semirigid transition phase from a long-segment metallic rod construct to the nonfused thoracic spine. Methods: Pure moment range of motion (ROM) tests (7.5 Nm) were performed on 7 cadaveric spine segments followed by compression (200 N). Specimens were tested in the following conditions: (1) intact; (2) T10-pelvis pedicle screws and rods (PSRs); and (3) extending the proximal construct to T6 using PEEK rods (PSR+PEEK). T10–11 rod strain, T9 anterolateral bone strain, and T10 screw bending moments were analyzed. Results: At the upper instrumented vertebra (UIV)+1, PSR+PEEK versus PSR significantly decreased ROM in flexion (115%, p = 0.02), extension (104%, p = 0.003), left lateral bending (46%, p = 0.02), and right lateral bending (63%, p = 0.008). Also, at UIV+1, PSR+PEEK versus intact significantly decreased ROM in flexion (111%, p = 0.01) and extension (105%, p = 0.003). The UIV+1 anterior column bone strain was significantly reduced with PSR+ PEEK versus PSR during right lateral bending (p = 0.02). Rod strain polarities reversed with PEEK rods in all loading directions except compression. Conclusion: Extending a long-segment construct using PEEK rods caused a decrease in adjacent-level hypermobility as a consequence of long-segment immobilization and also redistributed the strain on the UIV and adjacent levels, which might contribute to PJK physiopathology. Further studies are necessary to observe the clinical outcomes of this technique.
Endoscopic Gallbladder Drainage for Acute Cholecystitis
Jessica Widmer,Paloma Alvarez,Reem Z. Sharaiha,Sonia Gossain,Prashant Kedia,Savreet Sarkaria,Amrita Sethi,Brian G. Turner,Jennifer Millman,Michael Lieberman,Govind Nandakumar,Hiren Umrania,Monica Gaid 대한소화기내시경학회 2015 Clinical Endoscopy Vol.48 No.5
Background/Aims: Surgery is the mainstay of treatment for cholecystitis. However, gallbladder stenting (GBS) has shown promise in debilitated or high-risk patients. Endoscopic transpapillary GBS and endoscopic ultrasound-guided GBS (EUS-GBS) have been proposed as safe and effective modalities for gallbladder drainage. Methods: Data from patients with cholecystitis were prospectively collected from August 2004 to May 2013 from two United States academic university hospitals and analyzed retrospectively. The following treatment algorithm was adopted. Endoscopic retrograde cholangiopancreatography (ERCP) with sphincterotomy and cystic duct stenting was initially attempted. If deemed feasible by the endoscopist, EUS-GBS was then pursued. Results: During the study period, 139 patients underwent endoscopic gallbladder drainage. Among these, drainage was performed in 94 and 45 cases for benign and malignant indications, respectively. Successful endoscopic gallbladder drainage was defined as decompression of the gallbladder without incidence of cholecystitis, and was achieved with ERCP and cystic duct stenting in 117 of 128 cases (91%). Successful endoscopic gallbladder drainage was also achieved with EUS-guided gallbladder drainage using transmural stent placement in 11 of 11 cases (100%). Complications occurred in 11 cases (8%). Conclusions: Endoscopic gallbladder drainage techniques are safe and efficacious methods for gallbladder decompression in non-surgical patients with comorbidities.