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1.
J Anaesthesiol Clin Pharmacol ; 40(1): 101-107, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38666159

RESUMEN

Background and Aim: Intubation with Macintosh requires flexing the lower cervical spine and extending the atlanto-occipital joint to create a "line of sight." Primary aim of study was to compare the extent of cervical spine movement during laryngoscopy using conventional Macintosh laryngoscope and Airtraq. Material and Methods: A total of 25 patients of either sex between the age group of 18 and 60 years, having American Society of Anesthesiologists (ASA) physical status of Grade-I and Grade-II, scheduled for elective surgery under image control requiring general anesthesia and intubation were enrolled. A baseline image of the lateral cervical spine including the first four cervical vertebrae was taken by an image intensifier. After administration of general anesthesia, laryngoscopy was first performed using a Macintosh laryngoscope and a second X-ray image of the lateral cervical spine was taken. The second laryngoscopy using a Airtraq laryngoscope was done and the third image of the lateral cervical spine was taken. Angles between occiput and C1; C1 and C2; C2 and C3; C3 and C4; and occiput and C4 were calculated. Atlanto-occipital distance (AOD) was calculated as the distance between occiput and C1. Results: Macintosh showed greater cervical movement as compared with Airtraq but a significant difference in the movement was observed at C2-C3 and C0-C4. Baseline mean AOD was 2.21 ± 1.25 mm, after Macintosh and Airtraq laryngoscopy was found to be 1.13 ± 0.60 and 1.6 ± 0.78 mm, respectively, and was found to be significant (P < 0.05). Conclusion: We conclude that Airtraq allows intubation with less movement of the upper cervical spine makes Airtraq preferred equipment for intubation in patients with a potential cervical spine injury.

2.
Eur Spine J ; 32(4): 1115-1122, 2023 04.
Artículo en Inglés | MEDLINE | ID: mdl-36813904

RESUMEN

OBJECTIVES: The present study aimed to estimate the trunk muscles moment-arms in low back pain (LBP) patients and compare this data to those of healthy individuals. This research further explored whether the difference of the moment-arms between these two is a contributing factor to LBP. METHODOLOGY: Fifty patients with CLBP (group A) and 25 healthy controls (group B) were enrolled. All participants were subjected to magnetic resonance imaging of lumbar spine. Muscle moment-arms were estimated on a T2W axial section parallel to the disc. RESULTS: There was statistically significant differences (p < 0.05) in the sagittal plane moment-arms at L1-L2 for right erector spinae (ES), bilateral psoas and rectus abdominis (RA), right quadratus lumborum (QL), and left obliques; bilateral ES, QL, RA, and right psoas at L2-L3; bilateral QL, RA, and obliques at L3-L4; bilateral RA and obliques at L4-L5; and bilateral psoas, RA, and obliques at L5-S1. There was no statistically significant difference (p < 0.05) in the coronal plane moment-arms except for left ES and QL at L1-L2; left QL and right RA at L3-L4; right RA and obliques at L4-L5; and bilateral ES and right RA at L5-S1. CONCLUSIONS: There was a significant difference in muscle moment-arms of the lumbar spine's prime stabilizer (psoas) and primary locomotors (rectus abdominis and obliques) between LBP patients and healthy individuals. This difference in the moment-arms leads to altered compressive forces at intervertebral discs and may be one of the risk factors for LBP.


Asunto(s)
Músculos de la Espalda , Dolor de la Región Lumbar , Humanos , Dolor de la Región Lumbar/diagnóstico por imagen , Dolor de la Región Lumbar/patología , Imagen por Resonancia Magnética/métodos , Región Lumbosacra/patología , Vértebras Lumbares/diagnóstico por imagen , Vértebras Lumbares/patología
3.
Eur J Orthop Surg Traumatol ; 33(4): 1223-1230, 2023 May.
Artículo en Inglés | MEDLINE | ID: mdl-35543884

RESUMEN

INTRODUCTION: Consensus is lacking regarding management of posttraumatic infected diaphyseal nonunions of femur following intramedullary nailing. Present study reports outcomes of single stage standardised treatment protocol using monolateral rail external fixator/limb reconstruction system in this type of infected diaphyseal femoral nonunions. METHODS: This retrospective study included 26 patients with mean age of 31.7 years having posttraumatic infected diaphyseal femoral nonunions following intramedullary nailing and managed with radical debridement and monolateral rail fixator. The results were assessed by Association for the Study and Application of the Method of Ilizarov criteria. RESULTS: Mean intraoperative bone gap was 4.34 (range, 2-7) cm. Mean gain in bone length was 4.04 (range, 0-7) cm. Fracture united primarily in 22 cases and after freshening of edges, fixator adjustment and fibular grafting in three more patients. Infection persisted in one patient. Most common complications were superficial pin tract infection (15 patients) and loss of more than 30° knee flexion (13 patients). The bone results were excellent, good, and poor in 15, 9, and 2 patients, respectively. The functional results were excellent, good, fair, and poor in 11,13,1 and 1 patient, respectively. CONCLUSION: Single stage procedure including radical debridement, acute docking, distraction osteogenesis at corticotomy site and stabilization with monolateral rail fixator reliably achieves good to excellent bone and functional results, union and eradication of infection in majority of infected nonunions of femoral diaphysis developing after intramedullary fixation. We recommend acute docking in bone gap ≤ 5 cm.


Asunto(s)
Fracturas del Fémur , Fijación Intramedular de Fracturas , Fracturas no Consolidadas , Osteogénesis por Distracción , Humanos , Adulto , Estudios Retrospectivos , Diáfisis , Fémur/cirugía , Osteogénesis por Distracción/métodos , Fijadores Externos , Fracturas del Fémur/cirugía , Fracturas no Consolidadas/etiología , Fijación Intramedular de Fracturas/efectos adversos , Resultado del Tratamiento
4.
Qatar Med J ; 2023(3): 25, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38089673

RESUMEN

De novo Aspergillus infections of the appendicular skeleton are rare. A 72-year-old female presented with pain and deformity in her left lower limb and an inability to bear weight that had persisted for the last six months. A femur biopsy confirmed the diagnosis of extensive Aspergillus osteomyelitis, and the patient was treated with amphotericin B and oral voriconazole. The patient died of COVID-19 after 2.5 months of treatment. A diagnosis of Aspergillus osteomyelitis may be delayed because of its varied clinical presentation. To the best of our knowledge, this is the first known case of de novo neglected and extensive (multisite, multibone) Aspergillus osteomyelitis in an immunocompetent patient. This case highlights the importance of awareness in patients and treating physicians of this rare infection and its early diagnosis to prevent extensive spread.

5.
Arch Orthop Trauma Surg ; 142(8): 1923-1932, 2022 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-33983526

RESUMEN

AIM: The present prospective randomized study compared the bone transport technique (BT) and Masquelet technique (MT) in the treatment of infected gap non-union of the tibia. PATIENTS AND METHODS: Total 25 patients with infected gap non-union of the tibia with bone gap upto 6 cm were randomised into BT group (group I, 13 patients) and MT (group II, 12 patients). The mean age was 31.77 years in group I and 39.67 years in group II. The mean intra-operative bone gap was 3.92 cm in group I and 3.79 cm in group II. Monolateral fixator was applied in nine patients each in both groups, while four and three fractures were stabilized with ring fixators in group I and II, respectively. Mean follow-up was 31.62 months and 30.42 months in group I and II, respectively. Bone and functional results were compared using the association for the study and application of the method of Ilizarov (ASAMI) criteria. RESULTS: The average fixator period was 9.42 and 16.33 months in group I and II, respectively (p < 0.001). Union was achieved in 12 (92%) patients and 6 (50%) patients in group I and II, respectively. The functional results were excellent (eight and two), good (four and six), fair (zero and three) and poor (one and one) in group I and II respectively, (p 0.23). The Bone results were excellent, good and poor in nine, three and one patients in group I, and three, three and six patients in group II respectively, (p 0.109). CONCLUSIONS: The functional and bone results were comparable but more reliable in bone transport than the Masquelet technique. The fixator duration and incidence of non-union were higher in MT group. Ilizarov bone transport technique should be preferred in infected non-union of the tibia with bone loss upto 6 cm.


Asunto(s)
Fracturas no Consolidadas , Técnica de Ilizarov , Fracturas de la Tibia , Adulto , Fijadores Externos , Curación de Fractura , Fracturas no Consolidadas/cirugía , Humanos , Estudios Prospectivos , Estudios Retrospectivos , Tibia/cirugía , Fracturas de la Tibia/cirugía , Resultado del Tratamiento
6.
J Anaesthesiol Clin Pharmacol ; 37(4): 580-585, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-35340948

RESUMEN

Background and Aims: AA present prospective study was conducted to evaluate ocular changes occurring in patients undergoing spine surgery in the prone position. Material and Methods: A total of 44 patients of either sex, belonging to American society of Anaesthesiology I and II (aged 18-60 years) scheduled for elective spine surgery in prone position were enrolled in the study. Baseline IOP and MAP measurement were taken prior to induction. After induction of anaesthesia patients were intubated using flexo-metallic tube of appropriate size. IOP and MAP were recorded after induction of anaesthesia, following completion of surgery and immediately after turning the patient supine and 30 min following extubation. Blood loss and duration of surgery was also noted. The OPP was derived using the formula (OPP = MAP-IOP). Ophthalmic examination was also performed using direct and indirect ophthalmoscopy on the day prior to surgery and on first post-operative day to rule out anterior ischemic optic neuropathy (AION), posterior ischemic optic neuropathy (PION), and retinal ischemia. Results: Mean IOP significantly increased (18.91 ± 3.56 mm Hg) (P < 0.001) at the end of surgery as compared to baseline value 12.85 ± 3.07 mm Hg. As a result mean OPP significantly reduced (75.12 ± 16.45) (P = 0.0018) at the end of the procedure. Conclusion: In patient's undergoing spine surgery in the prone position, careful patient positioning with no extrinsic pressure on the eyes, minimal surgical time and blood loss, and prevention of intraoperative hypotension, should be ensured to prevent the IOP rise and a reduction in OPP which can further prevent post-operative visual disturbance.

7.
Eur Spine J ; 29(6): 1197-1211, 2020 06.
Artículo en Inglés | MEDLINE | ID: mdl-31440893

RESUMEN

PURPOSE: The Spinal Cord Society constituted a panel tasked with reviewing the literature on the radiological evaluation of spinal trauma with or without spinal cord injury and recommend a protocol. This position statement provides recommendations for the use of each modality, i.e., radiographs (X-rays), computed tomography (CT), magnetic resonance imaging (MRI), as well as vascular imaging, and makes suggestions on identifying or clearing spinal injury in trauma patients. METHODS: PubMed was searched for the corresponding keywords from January 1, 1980, to August 1, 2017. A MEDLINE search was subsequently undertaken after applying MeSH filters. Appropriate cross-references were retrieved. Out of the 545 articles retrieved, 105 relevant papers that address the present topic were studied and the extracted content was circulated for further discussions. A draft position statement was compiled and circulated among the panel members via e-mail. The draft was modified by incorporating relevant suggestions to reach a consensus. RESULTS AND CONCLUSION: For imaging cervical and thoracolumbar spine trauma patients, CT without contrast is generally considered to be the initial line of imaging and radiographs are required if CT is unavailable or unaffordable. CT screening in polytrauma cases is best done with a multidetector CT by utilizing the reformatted images obtained when scanning the chest, abdomen, and pelvis (CT-CAP). MRI is indicated in cases with neurological involvement and advanced cervical degenerative changes and to determine the extent of soft tissue injury, i.e., disco-ligamentous injuries as well as epidural space compromise. MRI is also usually performed when X-rays and CT are unable to correlate with patient symptomatology. These slides can be retrieved under Electronic Supplementary Material.


Asunto(s)
Traumatismos de la Médula Espinal , Traumatismos Vertebrales , Vértebras Cervicales/lesiones , Humanos , Imagen por Resonancia Magnética , Radiografía , Médula Espinal , Traumatismos de la Médula Espinal/diagnóstico por imagen , Traumatismos Vertebrales/diagnóstico por imagen
8.
Chin J Traumatol ; 22(6): 328-332, 2019 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-31753759

RESUMEN

PURPOSE: Distal femoral fracture is one of the most common lower limb injuries and accounts for less than 1% of all fractures. Open fracture takes 5%-10% of the all distal femoral fractures, which is at an increased risk of complications. There were limited studies which documented the outcomes of such cases. The present study aims to evaluate the outcome and complications in these fractures using primary definitive fixation with condylar locking plate and antibiotic impregnated collagen sheet secondary to aggressive debridement. METHODS: This is a prospective study conducted in a tertiary care orthopaedic hospital in northern India. Thirty patients of open distal femoral fractures were managed by primary definitive fixation with condylar locking plate and antibiotic impregnated collagen sheet secondary to aggressive debridement. They were followed for minimum of six months. Patients were followed up monthly for first four months, at six months and one year after surgery. Clinical and radiological signs of healing, any complications, time to union, and functional outcome were assessed. RESULTS: The mean age of patients was 44.33 years (range 20-82 years) with male predominance of 66.7%. According to Gustilo-Anderson classification, there were 5, 15 and 10 patients with open grade I, II and IIIA distal femoral fractures respectively. According to orthopaedic trauma association (OTA) classification, majority of patients in our study were of C3 type. The mean time to bony union was 5.6 months (range 4-9 months). Average postoperative knee range of motion (ROM) at the latest follow-up was 98° (range 70°-120°). Lysholm knee scoring scale showed excellent score in 11 patients, good in 9 patients, fair and poor in 5 patients each; however, there was no significant correlation with fracture pattern types (p < 0.05). Knee stiffness was the major complications encountered in the study. The knee ROM was <90° in 5 patients and 90°-120° in rest of the patients, while 1 patient had extensor lag of 10°. One patient had implant failure and lost to follow-up; 3 patients had deep infection. CONCLUSION: An approach of primary definitive fixation with condylar locking plate and antibiotic impregnated collagen sheet secondary to early aggressive debridement in open distal femur fractures shows significant results in terms of functional and radiological outcomes with minimal complications.


Asunto(s)
Antibacterianos/administración & dosificación , Colágeno/administración & dosificación , Fracturas del Fémur/cirugía , Fijación Interna de Fracturas/métodos , Fracturas Abiertas/cirugía , Adulto , Anciano , Anciano de 80 o más Años , Desbridamiento , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Resultado del Tratamiento , Adulto Joven
9.
J Mol Recognit ; 31(7): e2709, 2018 07.
Artículo en Inglés | MEDLINE | ID: mdl-29630761

RESUMEN

Epitope imprinting is a promising technique for fabrication of novel diagnostic tools. In this study, an epitope imprinted methodology for recognition of target epitope sequence as well as targeted protein infused by bacterial infection in blood samples of patients suffering from brain fever is developed. Template sequence chosen is a ferric iron binding fbp A protein present in Neisseria meningitidis bacteria. To orient the imprinting template peptide sequence on gold surface of electrochemical quartz crystal microbalance (EQCM), thiol chemistry was utilized to form the self-assembled monolayer on EQCM electrode. Here, synergistic effects induced by various noncovalent interactions extended by multiple monomers (3-sulfopropyl methacrylate potassium-salt and benzyl methacrylate) were used in fabricating the imprinting polymeric matrix with additional firmness provided by N,N-methylene-bis-acrylamide as cross-linker and azo-isobutyronitrile as initiator. Extraction of template molecule was carried out with phosphate buffer solution. After extraction of epitope molecules from the polymeric film, epitope molecularly imprinted polymeric films were fabricated on EQCM electrode surface. Nonimprinted polymers were also synthesized in the similar manner without epitope molecule. Detection limit of epitope molecularly imprinted polymers and imprinting factor (epitope molecularly imprinted polymers/nonimprinted polymers) was calculated 1.39 ng mL-1 and 12.27 respectively showing high binding capacity and specific recognition behavior toward template molecule. Simplicity of present method would put forward a fast, facile, cost-effective diagnostic tool for mass health care.


Asunto(s)
Proteínas Bacterianas/sangre , Técnicas Biosensibles/métodos , Epítopos/análisis , Proteínas de Unión a Hierro/sangre , Impresión Molecular/métodos , Neisseria meningitidis/química , Péptidos/química , Acrilamidas/química , Secuencia de Aminoácidos , Reactivos de Enlaces Cruzados/química , Electrodos , Epítopos/química , Humanos , Proteínas de Unión a Hierro/análisis , Límite de Detección , Meningitis Meningocócica/sangre , Meningitis Meningocócica/diagnóstico , Meningitis Meningocócica/microbiología , Metacrilatos/química , Tecnicas de Microbalanza del Cristal de Cuarzo
10.
Analyst ; 144(1): 331-341, 2018 Dec 17.
Artículo en Inglés | MEDLINE | ID: mdl-30406227

RESUMEN

Piperazine appended naphthalimide-BODIPYs (NPB1-NPB4) exhibiting solvatochromism and aggregation-induced emission with a large Stokes shift (up to 146 nm) have been described. Separation of naphthalimide and BODIPY fluorophores by piperazine in these conjugates creates a donor-acceptor system and induces twisted intramolecular charge transfer, in addition to photoinduced electron transfer. The crucial role of naphthalimide, the alkyl chain length, the piperazine ring, and the solid-state packing on AIE has been extensively investigated by various studies. Superior cell permeability coupled with bio-compatibility of these conjugates offers a unique opportunity for their potential applications in live cell lysosomal tracking.


Asunto(s)
Compuestos de Boro/química , Colorantes Fluorescentes/química , Lisosomas/metabolismo , Naftalimidas/química , Piperazinas/química , Compuestos de Boro/síntesis química , Compuestos de Boro/efectos de la radiación , Compuestos de Boro/toxicidad , Fluorescencia , Colorantes Fluorescentes/síntesis química , Colorantes Fluorescentes/efectos de la radiación , Colorantes Fluorescentes/toxicidad , Células HeLa , Humanos , Concentración de Iones de Hidrógeno , Luz , Estructura Molecular , Naftalimidas/síntesis química , Naftalimidas/efectos de la radiación , Naftalimidas/toxicidad , Piperazinas/síntesis química , Piperazinas/efectos de la radiación , Piperazinas/toxicidad , Espectrometría de Fluorescencia
11.
Inorg Chem ; 56(20): 12232-12247, 2017 Oct 16.
Artículo en Inglés | MEDLINE | ID: mdl-28956596

RESUMEN

A pyrazole-appended quinoline-based 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (L1, BODIPY) has been synthesized and used as a ligand for the preparation of iridium(III) complexes [Ir(phpy)2(L1)]PF6 (1; phpy = 2-phenylpyridine) and [(η5-C5Me5)Ir(L1)Cl]PF6 (2). The ligand L1 and complexes 1 and 2 have been meticulously characterized by elemental analyses and spectral studies (IR, electrospray ionization mass spectrometry, 1H and 13C NMR, UV/vis, fluorescence) and their structures explicitly authenticated by single-crystal X-ray analyses. UV/vis, fluorescence, and circular dichroism studies showed that complexes strongly bind with calf-thymus DNA and bovine serum albumin. Molecular docking studies clearly illustrated binding through DNA minor grooves via van der Waals forces and their electrostatic interaction and occurrence in the hydrophobic cavity of protein (subdomain IIA). Cytotoxicity, morphological changes, and apoptosis have been explored by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and Hoechst 33342 staining. IC50 values for complexes (1, 30 µM; 2, 50 µM) at 24 h toward the human cervical cancer cell line (HeLa) are as good as that of cisplatin (21.6 µM) under analogous conditions, and their ability to kill cancer cells lies in the order 1 > 2. Because of the inherent emissive nature of the BODIPY moiety, these are apt for intracellular visualization at low concentration and may find potential applications in cellular imaging and behave as a theranostic agent.


Asunto(s)
Antineoplásicos/farmacología , Compuestos de Boro/farmacología , Complejos de Coordinación/farmacología , Iridio/química , Antineoplásicos/síntesis química , Antineoplásicos/química , Apoptosis/efectos de los fármacos , Compuestos de Boro/síntesis química , Compuestos de Boro/química , Complejos de Coordinación/síntesis química , Complejos de Coordinación/química , ADN/química , Fluorescencia , Células HEK293 , Células HeLa , Humanos , Sustancias Intercalantes/síntesis química , Sustancias Intercalantes/química , Sustancias Intercalantes/farmacología , Ligandos , Modelos Químicos , Simulación del Acoplamiento Molecular , Pirazoles/síntesis química , Pirazoles/química , Pirazoles/farmacología , Quinolinas/síntesis química , Quinolinas/química , Quinolinas/farmacología , Albúmina Sérica/química , Viscosidad
12.
Chin J Traumatol ; 20(1): 39-44, 2017 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-28202370

RESUMEN

PURPOSE: New research is focusing on the use of autologous growth factors to increase the effect of bone fracture healing while decreasing the amount of healing time for the patient. Platelets have been demonstrated to be the natural storage vessel for several growth factors and cytokines that promote blood coagulation, tissue repair, and the process of bone mineralization. The present study aims to evaluate the role of platelet-rich plasma (PRP) in healing of acute femoral shaft fractures radiologically. We hypothesize that it provides artificial hematoma and releases various growth factors. METHODS: This prospective randomized study was carried out in 72 patients of traumatic fracture of the femoral shaft operated with interlocking nails (closed or open). Patients were divided into two groups: study group A (n = 33) treated with intramedullary nailing & PRP injection/gel application in the same setting; and control group B (n = 39) treated with intramedullary nailing without PRP application. Both groups were further divided into two subgroups. Study group included subgroup A1 (n = 14) operated with closed intramedullary nailing and PRP injection at the fracture site under radiological control, and subgroup A2 (n = 19) operated with open intramedullary nailing and PRP gel along with fibrin membrane application at the fracture site; while control group included subgroup B1 (n = 16) operated with closed intramedullary nailing, and subgroup B2 (n = 23) operated with open intramedullary nailing. Radiological assessment of fracture healing was done by measuring the cortex to callus ratio every month till union at 6 months. RESULTS: Measurements of mean cortex to callus ratio revealed significant difference between the groups A & B at third and fourth months. Measurements of mean cortex to callus ratio did not reveal significant difference between the subgroups at first and sixth months. A statistically significant difference was observed between subgroups A1 & B2 and B1 & B2 at the second month; between subgroups A1 & B2, A2 & B2 and B1 & B2 at the third month; and between subgroups A1 & B2 at fourth and fifth months. CONCLUSION: PRP has no effect on femoral shaft fracture healing treated with closed intramedullary nailing. However, PRP and matrix scaffold provided by fibrin membrane may provide an artificial hematoma effect in the initial phase of healing in open or failed closed intramedullary nailing.


Asunto(s)
Fracturas del Fémur/cirugía , Fijación Intramedular de Fracturas , Curación de Fractura , Plasma Rico en Plaquetas , Enfermedad Aguda , Adolescente , Adulto , Fracturas del Fémur/diagnóstico por imagen , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos
13.
Chemistry ; 22(2): 753-63, 2016 Jan 11.
Artículo en Inglés | MEDLINE | ID: mdl-26615814

RESUMEN

One-dimensional nanostructures with aggregation-induced emission (AIE) properties have been fabricated to keep the pace with growing demand from optoelectronics applications. The compounds 2-[4-(4-methylpiperazin-1-yl)benzylidene]malononitrile (PM1), 2-{4-[4-(pyridin-2-yl)piperazin-1-yl]-benzylidene}malononitrile (PM2), and 2-{4-[4-(pyrimidin-2-yl)piperazin-1-yl]benzylidene}malononitrile (PM3) have been designed and synthesized by melding piperazine and dicyanovinylene to investigate AIE in an asymmetric donor-acceptor (D-A) construct of A'-D-π-A- topology. The synthetic route has been simplified by using phenylpiperazine as a weak donor (D), dicyanovinylene as an acceptor (A), and pyridyl/pyrimidyl groups (PM2/PM3) as auxiliary acceptors (A'). It has been established that A' plays a vital role in triggering AIE in these compounds because the same D-A construct led to aggregation-caused quenching upon replacing A' with an electron-donating ethyl group (PM1). Moreover, the effect of restricted intramolecular rotation and twisted intramolecular charge transfer on the mechanism of AIE has also been investigated. Furthermore, it has been clearly shown that the optical disparities of these A'-D-π-A architectures are a direct consequence of comparative A' strength. Single-crystal X-ray analyses provided justification for role of intermolecular interactions in aggregate morphology. Electrochemical and theoretical studies affirmed the effect of the A' strength on the overall properties of the A'-D-π-A system.

14.
Chemistry ; 22(39): 13799-13804, 2016 Sep 19.
Artículo en Inglés | MEDLINE | ID: mdl-27434702

RESUMEN

A pioneering approach towards controlling the efficiency of saponification assisted gelation in ethyl ester based ZnII -complexes have been described. Using four new ester containing bis-salen ZnII complexes (C1-C4) involving different para-azo phenyl substituted ligands it has been clearly shown that gelation efficiency is greatly influenced by the electronic effects of the substituents (-H (C1), -CH3 (C2), -NO2 (C3), and -OCH3 (C4)). Morphological, photophysical, and rheological investigations corroborated the experimental observations well and established that gelation efficiency was enhanced with electron-withdrawing characteristics of substituents (C4

15.
Eur Spine J ; 25(9): 2864-72, 2016 09.
Artículo en Inglés | MEDLINE | ID: mdl-27421282

RESUMEN

PURPOSE: The aim of this study was to evaluate the lumbar trunk parameters by MRI and investigate their association with chronic low backache. METHODS: Fifty patients (26 males and 24 females) with mean age 33.54 ± 8.33 years with a history of low back pain (LBP) of minimum 3 consecutive months constituted the study group (Group A). To match with the study group, 15 normal healthy volunteers (9 males and 6 females) with no history of back pain were selected (Group B). Both the groups were subjected to magnetic resonance imaging of lumbosacral spine and lumbar trunk parameters were calculated. RESULTS: Trunk width, depth and skin angle were comparable at L3-L4, L4-L5 and L5-S1 disc levels; significant difference with regard to disc angle of L3-L4 (p = 0.005) and L4-L5 (p = 0.02) and cross-sectional area (CSA) of disc at L4-L5 level (p = 0.01) was observed between two groups. There was a tendency of smaller CSA of paraspinal and abdominal oblique muscles in Group A patients, but the measurements were not statistically different from Group B patients. Rectus abdominis muscles showed a unique pattern of larger CSA at L3-L4 and L4-L5 disc levels and smaller CSA at L5-S1 in LBP patients. Intervertebral disc degenerative changes on MRI were observed in 27 (54 %) patients in the Group A; and none of the Group B participants showed degenerative changes. CONCLUSIONS: Tendency of smaller trunk musculature CSA may be a cause or a result of chronic LBP. A unique pattern of larger CSA at L3-L4 and L4-L5 disc levels and smaller CSA at L5-S1 of Rectus abdominis muscles is observed in LBP patients compared to healthy persons. Differences in disc angles and CSA of disc at L3-L4 and L4-L5 levels between the two groups signify that these may be the predisposing factors leading to LBP due to abnormal load/stress transmission and precipitating early degenerative changes in the disc.


Asunto(s)
Dolor de la Región Lumbar/patología , Vértebras Lumbares/patología , Adulto , Anciano , Estudios de Casos y Controles , Femenino , Humanos , Disco Intervertebral/patología , Degeneración del Disco Intervertebral/patología , Dolor de la Región Lumbar/diagnóstico por imagen , Vértebras Lumbares/diagnóstico por imagen , Región Lumbosacra/patología , Imagen por Resonancia Magnética/métodos , Masculino , Persona de Mediana Edad , Torso/diagnóstico por imagen
16.
Chin J Traumatol ; 17(2): 84-7, 2014 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-24698576

RESUMEN

OBJECTIVE: Tibial shaft fractures are straightforward to treat but when associated with soft tissue injury particularly at the nail entry/plate insertion site or there is significant comminution proximally or a large butterfly fragment/a second split component in the posterior coronal plane, it is a challenge to the treating surgeon. The aim of the present report is to describe the technique of posterior coronal plating in such a scenario and its advantages. METHODS: Between July 2008 and June 2011, 12 patients were prospectively treated by this approach using 4.5 mm broad dynamic compression plates. RESULTS: The time of bony consolidation and full weight bearing averaged 21.7 weeks (range, 16-26 weeks). Patients were followed up for at least 24 months (range, 24-48 months). At 1 year postoperatively, no loss in reduction or alignment was observed. Mean Hospital for Lower Extremity Measurement Functional Score was 72.8 (range, 64-78). All patients were satisfied with their treatment outcomes. CONCLUSION: Direct posterior approach and fixation using prone position helps to visualise the fracture fragments and provide rigid fixation. The approach is simple and extensile easily, apart from advantages of less soft tissue and hardware problems compared to standard medial or lateral plating.


Asunto(s)
Placas Óseas , Fijación Interna de Fracturas/métodos , Fracturas de la Tibia/cirugía , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Posición Prona , Estudios Prospectivos
17.
Chin J Traumatol ; 16(6): 365-7, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-24295585

RESUMEN

Radial nerve palsy is the most common neurological involvement in humeral shaft fractures. But combined radial and median nerve injury in a closed diaphyseal fracture of the humerus is rare. Combined injury to both radial and median nerve can cause significant disability. A detailed clinical examination is therefore necessary following humeral shaft fractures. We report a patient with closed diaphyseal humeral fracture (AO 12A-2.3) together with radial and median nerve palsy, its management and review of the literature. As the patient had two nerves involved, surgical exploration was planned. Fracture was reduced and fixed with a 4.5 mm narrow dynamic compression plate. There was no external injury to both radial and median nerves on surgical exploration. Neurological recovery started at 3 weeks' follow-up. Complete recovery was seen at 12 weeks. Careful clinical examination is of the utmost importance in early diagnosis of combined nerve injuries, which allows better management and rehabilitation of the patient.


Asunto(s)
Nervio Mediano , Neuropatía Radial , Placas Óseas , Humanos , Fracturas del Húmero/cirugía , Húmero
18.
Int Wound J ; 10(4): 455-60, 2013 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-22697785

RESUMEN

The recurrence of pressure ulcers (PrUs) and dehiscence of reconstructive flap have always been a problem. The present study aimed to evaluate the results of reconstructive flap surgeries in patients with spinal cord injury (SCI) having PrUs, using classic and modified flaps with improvisations to decrease wound dehiscence, flap necrosis and tension in flap. This is a prospective clinical study. The setting was a tertiary care centre in northern India. Thirty-five patients with SCI having 37 stage III and IV PrUs. PrUs were treated using classic and modified flaps with improvisations. The outcome was evaluated using criteria of wound dehiscence, flap necrosis and recurrence. The results of flap surgery were excellent in 32 (86·48%) patients, good in 4 (10·81%) patients and poor in 1 (2·7%) patient. Partial flap necrosis (2·7%), low incidence of PrU recurrence rate at flap site (5·4%) and overall PrU recurrence (11·4%) were the complications observed. Improvisation of classic and modified techniques of flap surgeries along with reinforcement of general care principles of paraplegia can be effective in minimising complications often associated with PrU reconstructive surgery thus improving the ultimate outcome.


Asunto(s)
Procedimientos de Cirugía Plástica/métodos , Úlcera por Presión/etiología , Úlcera por Presión/cirugía , Traumatismos de la Médula Espinal/complicaciones , Colgajos Quirúrgicos/irrigación sanguínea , Cicatrización de Heridas/fisiología , Adolescente , Adulto , Estudios de Cohortes , Desbridamiento/métodos , Femenino , Estudios de Seguimiento , Rechazo de Injerto , Supervivencia de Injerto , Humanos , India , Masculino , Persona de Mediana Edad , Paraplejía/complicaciones , Paraplejía/diagnóstico , Complicaciones Posoperatorias/fisiopatología , Complicaciones Posoperatorias/terapia , Úlcera por Presión/fisiopatología , Estudios Prospectivos , Procedimientos de Cirugía Plástica/efectos adversos , Recurrencia , Medición de Riesgo , Índice de Severidad de la Enfermedad , Traumatismos de la Médula Espinal/diagnóstico , Centros de Atención Terciaria , Resultado del Tratamiento , Adulto Joven
19.
Spine Surg Relat Res ; 7(3): 257-267, 2023 May 27.
Artículo en Inglés | MEDLINE | ID: mdl-37309501

RESUMEN

Introduction: Conventional magnetic resonance imaging findings frequently do not correlate with the symptoms of lumbar disc herniation (LDH). Diffusion-weighted imaging can reveal important details about the microstructure of tissues. This study assessed the role of diffusion-weighted imaging (DTI) in LDH with radiculopathy and explored the relationship between DTI values and clinical scores. Methods: Forty-five patients with LDH with radiculopathy were evaluated via DTI at the intraspinal (IS), intraforaminal (IF), and extraforaminal (EF) levels. A visual analog scale (VAS) was used for low back and leg pain. The Japanese Orthopaedic Association (JOA) scoring system, Oswestry Disability Index (ODI), and Roland-Morris Disability Questionnaire (RMDQ) were used for functional evaluation. Results: There was a statistically significantly (p<0.05) difference between the apparent diffusion coefficient (ADC) and fractional anisotropy (FA) values on the affected side compared with those on contralateral normal side. The VAS score had a weak positive correlation with RMDQ score (r=0.279, P=0.050). The JOA score had a moderate negative correlation with RMDQ score (r=-0.428, P=0.002), whereas the ODI score had a moderate positive correlation with RMDQ score (r=0.554, P<0.001). There was a moderate positive correlation between ADC values at the IF level and the RMDQ score on the affected side (r=0.310, P=0.029). There was no correlation between FA values and JOA score. ODI had a significantly positive correlation with the contralateral normal side FA values at the IF (r=0.399, P=0.015), EF (r=0.368, P=0.008) and IS (r=0.343, P=0.015) levels. RMDQ had a weak positive correlation with the contralateral normal side FA values at the IF (r=0.311, P=0.028), IS (r=0.297, P=0.036) and EF (r=0.297, P=0.036) levels. Conclusions: The decrease in FA values and the increase in ADC values are useful markers of compression. ADC correlates well with the patient's neurological symptoms and functional status. Conversely, FA correlates well with the patient's neurological symptoms, but is not correlated well with the functional status.

20.
Cureus ; 15(3): e36149, 2023 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-37065338

RESUMEN

Tuberculosis is a well-known and ancient disease with a wide range of clinical presentations. Although tuberculosis is a well-known infectious disease, involvement of the symphysis pubis is rare, with only a few documented cases in the medical literature. Distinguishing it from other more common conditions, such as osteomyelitis of the pubic symphysis and osteitis pubis, is essential to avoid delay in diagnosis and to minimize morbidity, mortality, and complications. We present a rare case of tuberculosis of the symphysis pubis in an eight-year-old female from India who was initially misdiagnosed with osteomyelitis. Following the correct diagnosis and commencement of anti-tuberculosis chemotherapy, the patient demonstrated improvement in symptoms and hematological parameters at the three-month follow-up. This case emphasizes the importance of considering tuberculosis as a differential diagnosis in cases of symphysis pubis involvement, especially in areas with a high incidence of tuberculosis. Early diagnosis and appropriate treatment can prevent further complications and improve clinical outcomes.

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