scholarly journals Tailored approach for the resection of planum sphenoidale meningiomas

2019 ◽  
pp. 105-109
Author(s):  
Oana-Mihaela Punga ◽  
Cristiana-Elena Moisescu ◽  
D. Iftimie ◽  
D. Adam
Keyword(s):  
Frontal Sinus ◽  
Imaging Techniques ◽  
Third Ventricle ◽  
Anterior Wall ◽  
Falx Cerebri ◽  
Invasive Approach ◽  
Rare Tumours ◽  
Tailored Approach ◽  
Tuberculum Sellae ◽  
Planum Sphenoidale

Background and importance. Planum sphenoidale meningiomas are relatively rare tumours that can grow to a considerable size before determining noticeable symptoms. Modern imaging techniques can detect these tumours of varying size. Surgical resection of planum sphenoidale meningiomas can be performed by adapting the approach to the size of the tumour.Clinical presentation. A 56-year-old woman presented with a small (2 cm in diameter) planum sphenoidale meningioma that was resected through a frontal craniotomy performed with a 4,5 cm trephine at the level of the frontal sinus. The second case is that of a 55-year-old woman that presented with a large planum sphenoidale meningioma (5,6 cm in the antero-posterior plane and 5,5 cm cranio-caudally) extending to the tuberculum sellae and sellar diaphragm, reaching the anterior wall of the third ventricle. In this case, a bifrontal craniotomy was performed with frontal sinus cranialization and resection of falx cerebri, achieving a Simpson II resection. Both cases presented a favourable postoperative evolution, without any deficits and an excellent cosmetic result.Conclusion. The approach for tumours of the anterior skull base must be tailored to the size of the tumour. A minimally invasive approach through the frontal sinus should not be avoided in cases with small tumours.

scholarly journals The Cat Mandible (II): Manipulation of the Jaw, with a New Prosthesis Proposal, to Avoid Iatrogenic Complications

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 683
Author(s):  
Matilde Lombardero ◽  
Mario López-Lombardero ◽  
Diana Alonso-Peñarando ◽  
María del Mar Yllera
Keyword(s):  
Imaging Techniques ◽  
Recovery Period ◽  
Prosthesis Design ◽  
Patient Specific ◽  
Mandibular Fractures ◽  
Rigid Fixation ◽  
Invasive Approach ◽  
Non Invasive ◽  
Iatrogenic Complications ◽  
Mandibular Body

The cat mandible is relatively small, and its manipulation implies the use of fixing methods and different repair techniques according to its small size to keep its biomechanical functionality intact. Attempts to fix dislocations of the temporomandibular joint should be primarily performed by non-invasive techniques (repositioning the bones and immobilisation), although when this is not possible, a surgical method should be used. Regarding mandibular fractures, these are usually concurrent with other traumatic injuries that, if serious, should be treated first. A non-invasive approach should also first be considered to fix mandibular fractures. When this is impractical, internal rigid fixation methods, such as osteosynthesis plates, should be used. However, it should be taken into account that in the cat mandible, dental roots and the mandibular canal structures occupy most of the volume of the mandibular body, a fact that makes it challenging to apply a plate with fixed screw positions without invading dental roots or neurovascular structures. Therefore, we propose a new prosthesis design that will provide acceptable rigid biomechanical stabilisation, but avoid dental root and neurovascular damage, when fixing simple mandibular body fractures. Future trends will include the use of better diagnostic imaging techniques, a patient-specific prosthesis design and the use of more biocompatible materials to minimise the patient’s recovery period and suffering.

scholarly journals Holistic description of new deep sea megafauna (Cephalopoda: Cirrata) using a minimally invasive approach

BMC Biology ◽  
2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Alexander Ziegler ◽  
Christina Sagorny
Keyword(s):  
Minimally Invasive ◽  
Dna Barcoding ◽  
Deep Sea ◽  
Imaging Techniques ◽  
Structural Complexity ◽  
Micro Computed Tomography ◽  
Invasive Approach ◽  
Non Invasive ◽  
Additional Support ◽  
Holistic Description

Abstract Background In zoology, species descriptions conventionally rely on invasive morphological techniques, frequently leading to damage of the specimens and thus only a partial understanding of their structural complexity. More recently, non-destructive imaging techniques have successfully been used to describe smaller fauna, but this approach has so far not been applied to identify or describe larger animal species. Here, we present a combination of entirely non-invasive as well as minimally invasive methods that permit taxonomic descriptions of large zoological specimens in a more comprehensive manner. Results Using the single available representative of an allegedly novel species of deep-sea cephalopod (Mollusca: Cephalopoda), digital photography, standardized external measurements, high-field magnetic resonance imaging, micro-computed tomography, and DNA barcoding were combined to gather all morphological and molecular characters relevant for a full species description. The results show that this specimen belongs to the cirrate octopod (Octopoda: Cirrata) genus Grimpoteuthis Robson, 1932. Based on the number of suckers, position of web nodules, cirrus length, presence of a radula, and various shell characters, the specimen is designated as the holotype of a new species of dumbo octopus, G. imperator sp. nov. The digital nature of the acquired data permits a seamless online deposition of raw as well as derived morphological and molecular datasets in publicly accessible repositories. Conclusions Using high-resolution, non-invasive imaging systems intended for the analysis of larger biological objects, all external as well as internal morphological character states relevant for the identification of a new megafaunal species were obtained. Potentially harmful effects on this unique deep-sea cephalopod specimen were avoided by scanning the fixed animal without admixture of a contrast agent. Additional support for the taxonomic placement of the new dumbo octopus species was obtained through DNA barcoding, further underlining the importance of combining morphological and molecular datasets for a holistic description of zoological specimens.

Suprasellar meningiomas: the effect of tumor location on postoperative visual outcome

1988 ◽  
Vol 69 (4) ◽  
pp. 523-528 ◽  
Author(s):  
Brian T. Andrews ◽  
Charles B. Wilson
Keyword(s):  
Visual Loss ◽  
Visual Outcome ◽  
Tumor Location ◽  
Postoperative Recovery ◽  
Optic Canal ◽  
Visual Disability ◽  
Content Type ◽  
Tuberculum Sellae ◽  
Diaphragma Sellae ◽  
Planum Sphenoidale

✓ The authors reviewed 38 cases of suprasellar meningioma to determine the correlation between tumor site and postoperative visual outcome. Progressive visual loss, the most frequent initial complaint (94.7%), occurred over a mean of 24½ months, was most often unilateral (18 patients) or bilateral but asymmetrical (14 patients), and was severe (20/200 vision or worse) in 23 patients; 24 patients had visual field abnormalities. Computerized tomography or magnetic resonance studies clearly delineated the lesions but did not appear to permit earlier diagnosis. Eleven patients had tumors limited to the tuberculum sellae; the tumor extended from the tuberculum sellae onto the planum sphenoidale in nine patients, into one optic canal in eight, onto the diaphragma sellae in seven, and onto the medial sphenoid wing in three. Patients with tumors affecting the optic canal had severe unilateral visual loss more often than those with tumors at other sites. Tumors limited to the tuberculum sellae were most often completely resected; postoperative recovery of vision was also most frequent in patients with tumors at this site. Tumors involving the diaphragma sellae or the medial sphenoid wing were least often completely removed and most likely to be associated with postoperative visual deterioration. Overall, 42% of patients had improved vision postoperatively, 30% remained unchanged, and 28% were worse. After a mean follow-up period of 38 months, 24 patients are doing well, four have significant visual disability, and three are blind or doing poorly. Two patients died of causes unrelated to their tumor. Three patients have had tumor recurrence.

scholarly journals COLLOID CYST OF THE THIRD VENTRICLE

2010 ◽  
Vol 17 (01) ◽  
pp. 156-163
Author(s):  
NAVEED ASHRAF ◽  
MUHAMMAD AKMAL AZEEMI ◽  
FAUZIA SAJJAD ◽  
Asma Ghouri
Keyword(s):  
Clinical Success ◽  
Standard Procedure ◽  
Third Ventricle ◽  
Colloid Cyst ◽  
Invasive Approach ◽  
Keyhole Surgery ◽  
The Third ◽  
Number Of Patients ◽  
Colloid Cysts ◽  
Microsurgical Resection

Objectives: Cerebrospinal fluid shunting or microsurgical resection of the colloid cysts of the third ventricle have long been a standard treatment. The emergence of neuroendoscopy has lead to its application in various neurosurgical problems. Colloid cyst of the third ventricle is one such pathology where endoscopic treatment has been performed with great clinical success during the past decade. We now Although considered less efficacious than microsurgical excision endoscopic excision is less invasive and much simpler.Objectives: (1) to assess the extent of excision (2) to assess the morbid anatomy of the colloid cyst (3) to assess the risk of complications (4) to assess the functional outcome. Period: Eight years (Jul 2001-June 2009) Materials and Methods: Endoscopic resections of 15 colloid cysts of the third ventricle with obstruction of Foramina of Monroe in all cases. Results: Total removal was achieved in 10 (66.7%) cases. In 5 (33.3%) patients the colloid material was evacuated completely while the remnant of the capsule adherent to its origin was left behind. Two (13.3%) patients developed meningitis one week postoperatively and one diedsubsequently. Nine (60%) patients had excellent recovery as the symptoms were relieved during a period of 3 to 24 months. Five (33.3%) of the total patients required ventriculoperitoneal shunt for obstructivey drocephalus which developed with in 2 weeks after surgery. One out of the total number of patients deteriorated postoperatively on the existing neurological deficit. There has not been any recurrence until now with subtotal excision of the capsule. Conclusions: Keyhole surgery under endoscopic visual control offers an alternative, very effective minimally invasive approach for the excision of colloid cyst of the third ventricle and is likely to replace microsurgical resection as a standard procedure.

scholarly journals Clinical and angiographic profile in patients of western Rajasthan undergoing percutaneous coronary interventions: a single centre experience

2018 ◽  
Vol 6 (9) ◽  
pp. 3124
Author(s):  
Sanjeev Sanghvi ◽  
Aditya Kumar ◽  
Rohit Mathur ◽  
Anil Baroopal
Keyword(s):  
Percutaneous Coronary Intervention ◽  
Coronary Intervention ◽  
Anterior Wall ◽  
Invasive Approach ◽  
Medical College ◽  
Percutaneous Coronary ◽  
Femoral Route ◽  
Drug Eluting ◽  
Regional Population ◽  
Procedural Success

Background: This study was aimed to evaluate clinical and angiographic profile of patients undergoing percutaneous coronary intervention at the Department of Cardiology, Mathura Das Mathur (MDM) Hospital attached to Dr. Sampurnanand Medical College, Jodhpur.Methods: This study was hospital based prospective observational study conducted in the department of cardiology at MDM hospital. This study included 1166 patients who underwent percutaneous coronary intervention at cardiac cathlab of MDM hospital from January 2016 to April 2017. Procedural details noted included vascular access route, lesion characteristics, number of lesions intervened, stents used and periprocedural pharmacotherapy administered.Results: A total of 1166 patients (mean age- 56.3±10.4 years) with 76.5% male and 23.5% female were included in the study. Smoking and hypertension were the most common risk factors, present in 64% and 56% patients respectively. Diabetes mellitus and obesity were observed in 24.5% , 18.0% patients respectively. Anterior wall MI was the most common mode of presentation (36.2%). Single Vessel Disease (SVD) was the most common angiographic pattern observed in 62% patients; left anterior descending artery (LAD) was the most frequently involved vessel (65.9%); and type B lesions were most prevalent (48%). Most of the procedures were elective (61.4%) and femoral route was used in the majority (76%). Radial access was obtained in 24% of patients. Primary PCI was done in 6% of cases while pharmaco-invasive approach was adopted in 32.6% of patients. Drug eluting stents were deployed in 100% of the cases. The overall procedural success rate was 95.4%. Procedural mortality was nil and periprocedural complications occurred in 16.0% patients.Conclusions: This first PCI study from western Rajasthan provides an overview into the salient features of CAD among regional population and focus on the characteristics of PCIs performed with their outcomes.

scholarly journals Non-invasive Cardiac Radiation for Ablation of Ventricular Tachycardia: a New Therapeutic Paradigm in Electrophysiology

2018 ◽  
Vol 7 (1) ◽  
pp. 8 ◽  
Author(s):  
Eun-Jeong Kim ◽  
Giovanni Davogustto ◽  
William G Stevenson ◽  
Roy M John ◽  
◽  
...  
Keyword(s):  
Ventricular Tachycardia ◽  
Cardiac Tissue ◽  
Imaging Techniques ◽  
Case Series ◽  
Structural Heart Disease ◽  
Multicenter Studies ◽  
Invasive Approach ◽  
Non Invasive ◽  
Surface Ecg ◽  
Early Case

Non-invasive ablation of cardiac tissue to control ventricular tachycardia (VT) is a novel therapeutic consideration in the management of ventricular arrhythmias associated with structural heart disease. The technique involves the use of stereotactic radiotherapy delivered to VT substrates. Although invasive mapping can be used to identify the target, the use of non-invasive ECG and imaging techniques combined with multi-electrode body-surface ECG recordings offers the potential of a completely non-invasive approach. Early case series have demonstrated a consistent decrease in VT burden and sufficient early safety to allow more detailed multicenter studies. Such studies are currently in progress to further evaluate this promising technology.

Percutaneous Screws and External Fixation in Frontal Sinus Anterior Wall Fractures

2018 ◽  
Vol 29 (5) ◽  
pp. e489-e490
Author(s):  
Muhammet Uraloğlu ◽  
Alper Ural ◽  
Murat Livaoğlu ◽  
Naci Karaçal
Keyword(s):  
External Fixation ◽  
Frontal Sinus ◽  
Anterior Wall ◽  
Percutaneous Screws

Beyond biomarkers: How enhanced CT imaging can improve the diagnostic-driven management of invasive mould disease

2019 ◽  
Vol 57 (Supplement_3) ◽  
pp. S274-S286
Author(s):  
Marta Stanzani ◽  
Claudia Sassi ◽  
Giuseppe Battista ◽  
Russell E Lewis
Keyword(s):  
Hematological Malignancies ◽  
Imaging Techniques ◽  
Empirical Therapy ◽  
Antifungal Prophylaxis ◽  
Ct Imaging ◽  
Metabolic Imaging ◽  
X Rays ◽  
Vessel Occlusion ◽  
Invasive Approach ◽  
Enhanced Ct

Abstract CT imaging remains an essential diagnostic test for identification, staging and management of invasive mould infection (IMI) in patients with hematological malignancies. Yet the limited specificity of standard CT imaging can drive excessive antifungal use in patients, especially when more definitive diagnosis cannot be established through microbiology or invasive diagnostic procedures. CT pulmonary angiography (CTPA) is a complimentary, non-invasive approach to standard CT that allows for direct visualization of pulmonary arteries inside infiltrates for signs of angioinvasion, vessel destruction and vessel occlusion. Experience from several centers that are using CTPA as part of a standard diagnostic protocol for IMI suggests that a positive vessel occlusion sign (VOS) is the most sensitive and a specific sign of IMI in both neutropenic and non-neutropenic patients. CTPA is particularly useful in patients who develop suspected breakthrough IMI during antifungal prophylaxis because, unlike serum and/or BAL galactomannan and polymerase chain reaction (PCR) testing, the sensitivity is not reduced by antifungal therapy. A negative VOS may also largely rule-out the presence of IMI, supporting earlier discontinuation of empirical therapy. Future imaging protocols for IMI in patients with hematological malignancies will likely replace standard chest X-rays in favor of early low radiation dose CT exams for screening, with characterization of the lesions by CTPA and routine follow-up using functional/metabolic imaging such as 18F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (FDG-PET/CT) to assess treatment response. Hence, enhanced CT imaging techniques can improve the diagnostic-driven management of IMI management in high-risk patients with hematological malignancies.

Renal nerve inhibition by central NaCl and ANG II is abolished by lesions of the lamina terminalis

2000 ◽  
Vol 279 (5) ◽  
pp. R1827-R1833 ◽  
Author(s):  
C. N. May ◽  
R. M. McAllen ◽  
M. J. McKinley
Keyword(s):  
Hypertonic Saline ◽  
Third Ventricle ◽  
Plasma Renin ◽  
Anterior Wall ◽  
Lamina Terminalis ◽  
Ang Ii ◽  
Renal Nerve ◽  
Intracerebroventricular Infusion ◽  
Conscious Sheep ◽  
Nerve Inhibition

The lamina terminalis is situated in the anterior wall of the third ventricle and plays a major role in fluid and electrolyte homeostasis and cardiovascular regulation. The present study examined whether the effects of intracerebroventricular infusion of hypertonic saline and ANG II on renal sympathetic nerve activity (RSNA) were mediated by the lamina terminalis. In control, conscious sheep ( n = 5), intracerebroventricular infusions of 0.6 M NaCl (1 ml/h for 20 min) and ANG II (10 nmol/h for 30 min) increased mean arterial pressure (MAP) by 6 ± 1 ( P < 0.001) and 14 ± 3 mmHg ( P < 0.001) and inhibited RSNA by 80 ± 6 ( P < 0.001) and 89 ± 7% ( P < 0.001), respectively. Both treatments reduced plasma renin concentration (PRC). Intracerebroventricular infusion of artificial cerebrospinal fluid (1 ml/h for 30 min) had no effect. In conscious sheep with lesions of the lamina terminalis ( n = 6), all of the responses to intracerebroventricular hypertonic saline and ANG II were abolished. In conclusion, the effects of intracerebroventricular hypertonic saline and ANG II on RSNA, PRC, and MAP depend on the integrity of the lamina terminalis, indicating that this site plays an essential role in coordinating the homeostatic responses to changes in brain Na+ concentration.

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