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Article ; Online: Applying Tumescent solution for preserving the facial nerve in parotidectomy.

Duc, Nguyen Quang / Tien, Nguyen Phuong / Tu, Nguyen Thanh / Lam, Vu Ngoc

2022 Volume 46, Issue 2, Page(s) 801–806

Abstract: Background: Facial nerve palsy is one of the most common complications in parotid gland surgery. This report evaluates the effectiveness of applying Tumescent solution for preserving the facial nerve in parotidectomy.: Material and methods: ... ...

Abstract	Background: Facial nerve palsy is one of the most common complications in parotid gland surgery. This report evaluates the effectiveness of applying Tumescent solution for preserving the facial nerve in parotidectomy. Material and methods: Prospective and descriptive clinical study on 34 patients undergoing parotidectomy with facial nerve preservation. Before skin incision, 5-10 min, we injected 100-200 ml of the Tumescent solution into the surgical area. We recorded the surgical method, tumor size, length of surgery, pathological results and facial nerve dysfunction. All patients were followed for a period ranging from 6 to 24 months. Results: There were 14 patients with malignant tumors and 20 patients with benign tumors. The length of surgery lasted from 90 to 180 min, with an average of 126.8 min. The number of patients having temporary facial paralysis was 22 cases (64.7%), recovery time ranged from 1 week to 6 months, and no permanent facial paralysis cases were recorded. The clinical occurrence of Frey's syndrome was five cases (14.7%). Conclusions: The application of Tumescent solution for preserving facial nerves in parotidectomy could minimize nerve injury and shorten the length of surgery.
MeSH term(s)	Humans ; Facial Nerve/pathology ; Facial Paralysis/prevention & control ; Parotid Neoplasms/surgery ; Parotid Neoplasms/complications ; Parotid Neoplasms/pathology ; Prospective Studies ; Postoperative Complications/epidemiology ; Retrospective Studies
Language	English
Publishing date	2022-08-11
Publishing country	China
Document type	Journal Article
ZDB-ID	1068461-x
ISSN	0219-3108 ; 1015-9584
ISSN (online)	0219-3108
ISSN	1015-9584
DOI	10.1016/j.asjsur.2022.07.155
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Article: Association Between Tunnel Position, Tunnel Angle, Graft Signal Intensity, and Graft Thickness in the Reconstructed Posterior Cruciate Ligament.

Park, Seong Yun / Nam, Hee Seung / Ho, Jade Pei Yuik / Tu, Nguyen Thanh / Lee, Yong Seuk

Orthopaedic journal of sports medicine

2023 Volume 11, Issue 7, Page(s) 23259671231168893

Abstract: Background: An appropriate tunnel position, tunnel angle, and tunnel-graft angle are important factors for maintaining the stability and mechanical properties of a posterior cruciate ligament (PCL) graft.: Purpose: To evaluate the association between ...

Abstract	Background: An appropriate tunnel position, tunnel angle, and tunnel-graft angle are important factors for maintaining the stability and mechanical properties of a posterior cruciate ligament (PCL) graft. Purpose: To evaluate the association between tunnel position, tunnel angle, graft signal intensity ratio (SIR), and graft thickness after remnant-preserving PCL reconstruction. Study design: Cross-sectional study; Level of evidence, 3. Methods: Included were patients who had undergone remnant-preserving single-bundle PCL reconstruction using a tibialis anterior allograft between March 2014 and September 2020 and who had minimum 12-month postoperative magnetic resonance imaging scans. Tunnel position and angle were evaluated via 3-dimensional computed tomography, and their association with graft SIR on both the femoral and the tibial sides was determined. Graft thickness and SIR at 3 areas of the graft were evaluated and compared, and their association with tunnel-graft angle was also determined. Results: Overall, 50 knees (50 patients; 43 male, 7 female) were included. The mean time to postoperative magnetic resonance imaging was 25.8 ± 15.8 months. The mean SIR of the graft's midportion was higher compared with that of the proximal and distal portions ( Conclusion: The SIR of the proximal portion of the graft around the femoral tunnel was higher than that of the distal portion around the tibial tunnel. An anteriorly and distally positioned femoral tunnel and a laterally positioned tibial tunnel resulted in less acute tunnel-graft angles that were associated with decreased signal intensity.
Language	English
Publishing date	2023-07-05
Publishing country	United States
Document type	Journal Article
ZDB-ID	2706251-X
ISSN	2325-9671
ISSN	2325-9671
DOI	10.1177/23259671231168893
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Article: Lipectomy for madelung disease using tumescent technique: a cross-sectional study.

Duc, Nguyen Quang / Tien, Nguyen Phuong / Tu, Nguyen Thanh / Huynh, Hoang Ngoc / Linh, Le Diep

Annals of medicine and surgery (2012)

2023 Volume 85, Issue 6, Page(s) 2550–2558

Abstract: Madelung's disease is a rare disfiguring disorder that affects both function and esthetic appearance in the head and/or shoulder, neck, and arms regions. Lipectomy is typically necessary but such treatment can encounter difficulties due to the large ... ...

Abstract	Madelung's disease is a rare disfiguring disorder that affects both function and esthetic appearance in the head and/or shoulder, neck, and arms regions. Lipectomy is typically necessary but such treatment can encounter difficulties due to the large sizes of the tumors, interspersed with important organs in the surrounding region. In this report, the authors evaluate the effectiveness of using tumescent solution in lipectomy to provide a dual treatment of tissue removal for Madelung disease in the head-and-neck region. Methods: A prospective study and clinical descriptions were conducted on 17 patients undergoing 26 head-and-neck lipectomies. A tumescent solution was injected into the surgical region with a blunt-tip cannula 5-10 min before skin incision. The authors recorded systemic manifestations both during and after surgery; tumescent volume; surgical region; clarity of the operative field; weight of fat removed, and early complications. After surgery, the authors followed the patients from periods of 3 months to 4 years. Results: All 17 male patients had a history of alcoholism. In total, 12 lipectomies for the removal of anterior neck fatty masses and 14 lipectomies for the removal of posterior neck fatty masses were performed. The average amount of tumescent injected was 260.1 ml (range 140-550 ml). Surgery was reported as totally bloodless in 10 (38.5%) operative fields, with minimum bleeding in 12 (46.1%) operative fields, acceptable bleeding in four (15.4%) operative fields. The average surgical time was 175.6 min (range 135-250 min). The removed fatty masses weighed between 250 and 2150 g, with an average of 582.9 g. Early complications were seen in four patients, accounting for 15.4% (2 hematoma, 1 skin necrosis, and 1 seroma). Conclusions: Using tumescent solution in lipectomies to treat Madelung disease in the head and neck area is a simple, safe, and useful technique. The technique helps to create a clean operative field, reduces bleeding, and thereby assists surgeons during the operation.
Language	English
Publishing date	2023-05-16
Publishing country	England
Document type	Journal Article
ZDB-ID	2745440-X
ISSN	2049-0801
ISSN	2049-0801
DOI	10.1097/MS9.0000000000000806
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Article ; Online: Prior tuberosity screw fixation of the osteotomized tubercle can lead to favorable outcomes in retro-tubercular bi-planar opening wedge high tibial osteotomy.

Park, Seong Yun / Park, Sung Bae / Ho, Jade Pei Yuik / Tu, Nguyen Thanh / Lee, Yong Seuk

The Knee

2023 Volume 45, Page(s) 75–84

Abstract: Background: Exact information regarding fixing the tuberosity screw during retro-tubercular opening-wedge high tibial osteotomy (RT-OWHTO) is still lacking. The purpose of this study was to determine whether prior tuberosity screw fixation before plate ... ...

Abstract	Background: Exact information regarding fixing the tuberosity screw during retro-tubercular opening-wedge high tibial osteotomy (RT-OWHTO) is still lacking. The purpose of this study was to determine whether prior tuberosity screw fixation before plate fixation of main osteotomy fragment can prevent complications associated with tuberosity screw. Methods: From 2019 to 2021, patients who underwent RT-OWHTO were divided into two groups (group I, prior tuberosity screw fixation; group II, later tuberosity screw fixation). A total of 49 and 44 knees were included in groups I and II, respectively. Plain radiographs and computed tomography (CT) were used to analyze the parameters of tuberosity screw fixation, neurovascular (NV) safety and osteotomy configurations. Clinical outcomes and post-operative complications were assessed. Results: The delta (Δ) of the deformation angle of the tuberosity (P = 0.002), delta (Δ) of the posterior tibial slope (PTS) (P < 0.001), extruded screw length (P < 0.001), and retro-tuberosity tip distance (P < 0.001) of group I were significantly smaller than those of group II. All tuberosity screws were fixed medially to the NV structures. Post-operative tuberosity fracture occurred in one knee (2%) in group I and in 10 knees (23%) in group II (P = 0.003). Conclusions: RT-OWHTO with prior tuberosity screw fixation can minimize the risk of tuberosity fracture and an increase in the PTS. It can also prevent NV injuries by reducing extruded tuberosity screw length and fixing it medially from the NV structures.
MeSH term(s)	Humans ; Osteoarthritis, Knee/surgery ; Retrospective Studies ; Knee Joint/diagnostic imaging ; Knee Joint/surgery ; Osteotomy/adverse effects ; Osteotomy/methods ; Tibia/diagnostic imaging ; Tibia/surgery ; Bone Screws
Language	English
Publishing date	2023-11-03
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	1200476-5
ISSN	1873-5800 ; 0968-0160
ISSN (online)	1873-5800
ISSN	0968-0160
DOI	10.1016/j.knee.2023.09.005
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Article ; Online: Retro-tubercular Biplanar Medial Opening-Wedge High Tibial Osteotomy Results in Superior Patellofemoral Alignment Versus Supra-tubercular Osteotomy.

Cho, Joon Hee / Nam, Hee Seung / Ho, Jade Pei Yuik / Tu, Nguyen Thanh / Lee, Yong Seuk

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

2023 Volume 40, Issue 4, Page(s) 1206–1219

Abstract: Purpose: To compare the changes in patellofemoral (PF) joint alignment, focusing on multiple planes, between two different types of biplanar medial opening-wedge high tibial osteotomy (OWHTO).: Methods: Patients who underwent biplanar OWHTO between ... ...

Abstract	Purpose: To compare the changes in patellofemoral (PF) joint alignment, focusing on multiple planes, between two different types of biplanar medial opening-wedge high tibial osteotomy (OWHTO). Methods: Patients who underwent biplanar OWHTO between July 2017 and May 2021 were retrospectively evaluated. They were allocated to either the supra-tubercular (ST)- or retro-tubercular (RT)-OWHTO group. The following radiologic parameters were compared between the two groups: 1) weight-bearing line ratio (WBLR), 2) patellar height, 3) posterior tibial slope (PTS), 4) tibial tubercle-trochlear groove (TT-TG) distance, 5) TT-TG angle, and 6) femoral shaft-patellar tendon (FS-PT) angle. Clinical outcomes and the minimal clinically important difference (MCID) were also evaluated. Results: In total, 104 knees that underwent ST-OWHTO and 105 knees that underwent RT-OWHTO were evaluated. The patellar height significantly decreased only after ST-OWHTO (P < .001). The TT-TG distance and FS-PT angle significantly increased, more after ST-OWHTO than RT-OWHTO (mean change value: 5.72 mm vs 1.91 mm; P < .001 for TT-TG distance; and 4.72° vs 1.80°; P < .001 for FS-PT angle). The TT-TG angle increased significantly after ST-OWHTO (mean change value: 7.62°; P < .001) but decreased after RT-OWHTO mean change value: -4.30°; P < .001). The PTS more increased after RT-OWHTO than after ST-OWHTO (mean change value: 0.91° vs 1.69°; P = .003). Clinical outcomes in both groups improved postoperatively, and no significant differences were observed between the groups. Conclusions: RT-OWHTO resulted in lesser changes in multiplane PF joint alignment than ST-OWHTO. However, no difference was observed in clinical outcomes between both groups, and PTS increased after RT-OWHTO. Therefore, these aspects of RT-OWHTO should also be considered. Level of evidence: Level III, retrospective cohort study.
MeSH term(s)	Humans ; Retrospective Studies ; Osteoarthritis, Knee/surgery ; Knee Joint/surgery ; Patellofemoral Joint/diagnostic imaging ; Patellofemoral Joint/surgery ; Osteotomy/methods
Language	English
Publishing date	2023-08-18
Publishing country	United States
Document type	Journal Article
ZDB-ID	632528-2
ISSN	1526-3231 ; 0749-8063
ISSN (online)	1526-3231
ISSN	0749-8063
DOI	10.1016/j.arthro.2023.08.012
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Zs.A 2046: Show issues

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Article ; Online: Graft impingement increases anterior cruciate ligament graft signal more than acute graft bending angle: magnetic resonance imaging-based study in outside-in anterior cruciate ligament reconstruction.

Park, Seong Yun / Cho, Joon Hee / Ho, Jade Pei Yuik / Tu, Nguyen Thanh / Kim, Yong Beom / Lee, Yong Seuk

Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA

2023 Volume 31, Issue 10, Page(s) 4379–4389

Abstract: Purpose: In this study, the relationship between patient-specific geometric factors and tunnel placement in graft impingement was identified by using magnetic resonance imaging (MRI) signal intensity of anterior cruciate ligament (ACL) grafts.: ... ...

Abstract	Purpose: In this study, the relationship between patient-specific geometric factors and tunnel placement in graft impingement was identified by using magnetic resonance imaging (MRI) signal intensity of anterior cruciate ligament (ACL) grafts. Methods: Ninety-two patients, who were treated between 2014 and 2020, were included retrospectively. These patients underwent primary remnant-preserving outside-in ACL reconstruction (ACLR) and were followed up with postoperative MRI at least one year after surgery. Plain radiographs and computed tomography (CT) were used to analyze tibial and femoral tunnel positions. Postoperative MRI was performed, at 32.8 ± 17.5 months after surgery, to evaluate the graft signal intensity, the ACL/posterior cruciate ligament (PCL) ratio (APR), ACL/muscle ratio (AMR), tunnel positions, and graft impingement. Clinical and stability outcomes were analyzed using the International Knee Documentation Committee (IKDC) subjective and objective scores, Lysholm scores, and side-to-side differences (SS-D). Results: The mean APR and AMR of the proximal third of the grafts were significantly lower than those of the middle third of the grafts (p = 0.017 and p = 0.045, respectively). Multivariate regression analysis showed that there was a negative association between the mean APR and AMR of entire intra-articular ACL graft and the distance from the anterior end of the intercondylar roof to the center of the tibial tunnel in the sagittal plane (p < 0.001 and p < 0.001, respectively) and the notch width index (p < 0.001 and p = 0.002, respectively). No significant correlations were found between tunneling and geometric factors, and clinical scores or SS-D. Conclusions: Graft impingement on the anterior tibial tunnel relative to the end of the intercondylar roof and narrow notch was a more significant contributing factor on increased signal intensities of the ACL graft, compared with the acute femoral bending angle in remnant-preserving outside-in ACLR. Therefore, surgeons should focus on intercondylar notch anatomy during tibial tunnel placement to avoid roof impingement. Level of evidence: Level III.
MeSH term(s)	Humans ; Anterior Cruciate Ligament/diagnostic imaging ; Anterior Cruciate Ligament/surgery ; Retrospective Studies ; Knee Joint/surgery ; Magnetic Resonance Imaging/methods ; Tibia/surgery ; Anterior Cruciate Ligament Injuries/diagnostic imaging ; Anterior Cruciate Ligament Injuries/surgery ; Anterior Cruciate Ligament Reconstruction/methods
Language	English
Publishing date	2023-06-23
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1159064-6
ISSN	1433-7347 ; 0942-2056
ISSN (online)	1433-7347
ISSN	0942-2056
DOI	10.1007/s00167-023-07491-z
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Zs.A 3742: Show issues

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Book ; Online: Heavily Fe-doped n-type ferromagnetic semiconductor (In,Fe)Sb with high Curie temperature and large magnetic anisotropy

Tu, Nguyen Thanh / Hai, Pham Nam / Anh, Le Duc / Tanaka, Masaaki

2019

Abstract: We present high-temperature ferromagnetism and large magnetic anisotropy in heavily Fe-doped n-type ferromagnetic semiconductor (In1-x,Fex)Sb (x = 20 - 35%) thin films grown by low-temperature molecular beam epitaxy. The (In1-x,Fex)Sb thin films with x = ...

Abstract	We present high-temperature ferromagnetism and large magnetic anisotropy in heavily Fe-doped n-type ferromagnetic semiconductor (In1-x,Fex)Sb (x = 20 - 35%) thin films grown by low-temperature molecular beam epitaxy. The (In1-x,Fex)Sb thin films with x = 20 - 35% maintain the zinc-blende crystal and band structure with single-phase ferromagnetism. The Curie temperature (TC) of (In1-x,Fex)Sb reaches 390 K at x = 35%, which is significantly higher than room temperature and the highest value so far reported in III-V based ferromagnetic semiconductors. Moreover, large coercive force (HC = 160 Oe) and large remanent magnetization (Mr/MS = 71%) have been observed for a (In1-x,Fex)Sb thin film with x = 35%. Our results indicate that the n-type ferromagnetic semiconductor (In1-x,Fex)Sb is very promising for spintronics devices operating at room temperature. Comment: arXiv admin note: text overlap with arXiv:1706.00735
Keywords	Condensed Matter - Materials Science
Subject code	530
Publishing date	2019-01-06
Publishing country	us
Document type	Book ; Online
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Book ; Online: In-plane to perpendicular magnetic anisotropy switching in heavily-Fe-doped ferromagnetic semiconductor (Ga,Fe)Sb with high Curie temperature

Goel, Shobhit / Anh, Le Duc / Tu, Nguyen Thanh / Ohya, Shinobu / Tanaka, Masaaki

2019

Abstract: We report switching of magnetic anisotropy (MA) from in-plane to perpendicular with increasing the thickness d of a (001)-oriented ferromagnetic-semiconductor (FMS) (Ga0.7,Fe0.3)Sb layer with a high Curie temperature (Tc > 320 K), using ferromagnetic ... ...

Abstract	We report switching of magnetic anisotropy (MA) from in-plane to perpendicular with increasing the thickness d of a (001)-oriented ferromagnetic-semiconductor (FMS) (Ga0.7,Fe0.3)Sb layer with a high Curie temperature (Tc > 320 K), using ferromagnetic resonance at room temperature. We show that the total MA energy (E) along the [001] direction changes its sign from positive (in-plane) to negative (perpendicular) with increasing d above an effective critical value \mathrm{d}_\mathrm{C}^\mathrm{*}\ ~ 42 nm. We reveal that (Ga,Fe)Sb has two-fold symmetry in the film plane. Meanwhile, in the plane perpendicular to the film including the in-plane [110] axis, the two-fold symmetry with the easy magnetization axis along [110] changes to four-fold symmetry with easy magnetization axis along <001> with increasing d. This peculiar behavior is different from that of (Ga,Mn)As, in which only the in-plane MA depends on the film thickness and has four-fold symmetry due to its dominant cubic anisotropy along the <100> axes. This work provides an important guide for controlling the easy magnetization axis of high-Tc FMS (Ga,Fe)Sb for room-temperature device applications.
Keywords	Condensed Matter - Materials Science
Subject code	530
Publishing date	2019-07-02
Publishing country	us
Document type	Book ; Online
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Book ; Online: Evolution of the Fe-3$d$ impurity band state as the origin of high Curie temperature in p-type ferromagnetic semiconductor (Ga,Fe)Sb

Takeda, Takahito / Sakamoto, Shoya / Araki, Kohsei / Fujisawa, Yuita / Anh, Le Duc / Tu, Nguyen Thanh / Takeda, Yukiharu / Fujimori, Shin-ichi / Fujimori, Atsushi / Tanaka, Masaaki / Kobayashi, Masaki

2020

Abstract: Ga$_{1-x}$,Fe$_x$)Sb is one of the promising ferromagnetic semiconductors for spintronic device applications because its Curie temperature ($T_{\rm C}$) is above 300 K when the Fe concentration $x$ is equal to or higher than ~0.20. However, the origin ... ...

Abstract	(Ga$_{1-x}$,Fe$_x$)Sb is one of the promising ferromagnetic semiconductors for spintronic device applications because its Curie temperature ($T_{\rm C}$) is above 300 K when the Fe concentration $x$ is equal to or higher than ~0.20. However, the origin of the high $T_{\rm C}$ in (Ga,Fe)Sb remains to be elucidated. To address this issue, we use resonant photoemission spectroscopy (RPES) and first-principles calculations to investigate the $x$ dependence of the Fe 3$d$ states in (Ga$_{1-x}$,Fe$_x$)Sb ($x$ = 0.05, 0.15, and 0.25) thin films. The observed Fe 2$p$-3$d$ RPES spectra reveal that the Fe-3$d$ impurity band (IB) crossing the Fermi level becomes broader with increasing $x$, which is qualitatively consistent with the picture of double-exchange interaction. Comparison between the obtained Fe-3$d$ partial density of states and the first-principles calculations suggests that the Fe-3$d$ IB originates from the minority-spin ($\downarrow$) $e$ states. The results indicate that enhancement of the interaction between $e_\downarrow$ electrons with increasing $x$ is the origin of the high $T_{\rm C}$ in (Ga,Fe)Sb.
Keywords	Condensed Matter - Materials Science
Subject code	530
Publishing date	2020-08-18
Publishing country	us
Document type	Book ; Online
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Book ; Online: Hybridization between the ligand $p$ band and Fe-3$d$ orbitals in the p-type ferromagnetic semiconductor (Ga,Fe)Sb

Takeda, Takahito / Suzuki, Masahiro / Anh, Le Duc / Tu, Nguyen Thanh / Schmitt, Thorsten / Yoshida, Satoshi / Sakano, Masato / Ishizaka, Kyoko / Takeda, Yukiharu / Fijimori, Shin-ichi / Seki, Munetoshi / Tabata, Hitoshi / Fujimori, Atsushi / Strocov, Vladimir N. / Tanaka, Masaaki / Kobayashi, Masaki

2020

Abstract: Ga,Fe)Sb is a promising ferromagnetic semiconductor for practical spintronic device applications because its Curie temperature ($T_{\rm C}$) is above room temperature. However, the origin of ferromagnetism with high $T_{\rm C}$ remains to be elucidated. ...

Abstract	(Ga,Fe)Sb is a promising ferromagnetic semiconductor for practical spintronic device applications because its Curie temperature ($T_{\rm C}$) is above room temperature. However, the origin of ferromagnetism with high $T_{\rm C}$ remains to be elucidated. Here, we use soft x-ray angle-resolved photoemission spectroscopy (SX-ARPES) to investigate the valence-band (VB) structure of (Ga$_{0.95}$,Fe$_{0.05}$)Sb including the Fe-3$d$ impurity band (IB), to unveil the mechanism of ferromagnetism in (Ga,Fe)Sb. We find that the VB dispersion in (Ga$_{0.95}$,Fe$_{0.05}$)Sb observed by SX-ARPES is similar to that of GaSb, indicating that the doped Fe atoms hardly affect the band dispersion. The Fe-3$d$ resonant ARPES spectra demonstrate that the Fe-3$d$ IB crosses the Fermi level ($E_{\rm F}$) and hybridizes with the VB of GaSb. These observations indicate that the VB structure of (Ga$_{0.95}$,Fe$_{0.05}$)Sb is consistent with that of the IB model which is based on double-exchange interaction between the localized 3$d$ electrons of the magnetic impurities. The results indicate that the ferromagnetism in (Ga,Fe)Sb is formed by the hybridization of the Fe-3$d$ IB with the ligand $p$ band of GaSb. Comment: 24 pages, 6 figures
Keywords	Condensed Matter - Materials Science
Subject code	530
Publishing date	2020-01-09
Publishing country	us
Document type	Book ; Online
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