Transverse Vein Research Articles

<p><strong>A new species of<em> Geranium </em>(Geraniaceae) from Himachal Pradesh, India</strong></p>

Geranium lahulense, a new species from Keylong, Lahul & Spiti district of Himachal Pradesh, is described and illustrated. The new species is distinguished from its allied species (G. richardsonii, G. pratense, G. himalayense) by its deltoid-subulate stipules, polygonal to sub-globular leaves with widely separated rhombic segments, white obovate-cordate petals and mericarps without any transverse vein at apex. A morphological comparison with related species and taxonomic key to distinguish the species are also provided.

The use of transverse cervical artery and cephalic vein A-V loop as alternative recipient vessels in free flap breast reconstruction

The use of transverse cervical artery and cephalic vein A-V loop as alternative recipient vessels in free flap breast reconstruction

An anatomical study on the availability of contralateral recipient vessels in hemi-mandibular reconstruction with vascularised free fibula transfer

Background: In mandibular reconstruction with vascularised free fibula transfer, there are situations where the neck on the operated site lacks recipient vessels for vascular anastomosis due to previous radiological/surgical interventions.Methods: The present study aims to clarify the availability of neck vessels on the contralateral side in such situations. Experimental surgery was conducted on 20 fresh cadavers (six males and 14 females). After the left half of the mandible was removed, free vascularised fibula of equivalent length was transferred to fill the defect. The possibility of connecting the peroneal artery and vein to the superior thyroid artery (STA), transverse coli artery (TCA), internal jugular vein (IJV), and external jugular vein (EJV) of the contralateral side was evaluated.Results: In all samples, the peroneal vessels could reach the STA and EJV. However, the peroneal vessels could reach the TCA and IJV of the contralateral side in only 45% and 64.2% of cases, respectively. The average and standard deviation of the lengths by which vessels were insufficient were 1.1 ± 13.9 mm for IJV and 8.8 ± 24.7 mm for TCA.Conclusions: In reference to these findings, it is concluded that, in situations where neck vessels of the defect side are unavailable, availability of the superior thyroid artery and external jugular vein should be examined first. When these vessels are available as recipient vessels, direct vascular anastomosis is highly likely to be successful. In cases where these vessels are unavailable and the transverse coli artery or internal jugular vein is used as the recipient, vascular interposition might be necessary.

Media Damage Following Detergent Sclerotherapy Appears to be Secondary to the Induction of Inflammation and Apoptosis: An Immunohistochemical Study Elucidating Previous Histological Observations

Traditionally, sclerotherapy has been thought to work by the cytotoxic effect of the sclerosant upon the endothelium alone. However, studies have shown that sclerotherapy is more successful in smaller veins than in larger veins. This could be explained by the penetration of the sclerosant, or its effect, into the media. This study aimed to investigate intimal and medial damage profiles after sclerosant treatment. Fresh human varicose veins were treated ex vivo with either 1% or 3% sodium tetradecyl sulphate (STS) for 1 or 10 minutes. The effect of the sclerosant on the vein wall was investigated by immunofluorescent labelling of transverse vein sections using markers for endothelium (CD31), smooth muscle (α-actin), apoptosis (p53) and inflammation (intercellular adhesion molecule-1 [ICAM-1]). Polidocanol (POL; 3%) treatment at 10 minutes was similarly investigated. Endothelial cell death was concentration- and time-dependent for STS but incomplete for both sclerosants. Time, but not concentration, significantly affected cell death (p > .001). A 40% and 30% maximum reduction was observed for STS and POL, respectively. Destruction of 20-30% of smooth muscle cells was found up to 250 μm from the lumen after 3% STS treatment for 10 minutes. POL treatment for 10 minutes showed inferior destruction of medial cells. Following STS treatment and 24-hour tissue culture, p53 and ICAM-1 were upregulated to a depth of around 300 μm. This effect was not observed with POL. Inflammatory and apoptotic markers show the same distribution as medial cell death, implying that sclerotherapy with STS works by inducing apoptosis in the vein wall rather than having an effect restricted to the endothelium. Incomplete loss of endothelial cells and penetration of the sclerosant effect up to 250 μm into the media suggest that medial damage is crucial to the success of sclerotherapy and may explain why it is less effective in larger veins.

NCO-07CASE REPORT: CARCINOMATOUS OPTIC NEUROPATHY

38 years old female presented with progressive double vision followed by decreased visual acuity in left eye to almost 20/400 and later right eye. Her initial MRI B was unremarkable. LP showed opening pressure of 60, WBC 2, protein 144, normal glucose. Fundoscopic examination did not reveal any papilloedema. Considering her progressive vision loss and double vision, EVD was placed with resolution of her double vision and very mild improvement in her visual acuity. After 2 days, VP shunt was placed but her visual acuity got worse afterwards. MRV brain showed possible venous sinus thrombosis left transverse, sigmoid and internal jugular vein. At this point she also started having progressive numbness/tingling and weakness in her lower extremities. CT abdomen showed colon mass so she had colon biopsy showing poorly differentiated adenocarcinoma. At this point she was transferred to our facility for further evaluation. MRI T and L spine showed spinal root enhancement, repeat LP showed protein 1501, WBC 3 and normal glucose. EMG showed early intraspinal process at multiple levels affecting the lumbar and cervical spinal roots. Colon biopsy was repeated and confirmed poorly differentiated adenocarcinoma. Her CA 125 was 447 so ovarian carcinoma was suspected. CONCLUSION: Opthalmoplegia in our patient was probably from ICP secondary to carcinomatous meningitis. Even with progressive vision loss, she did not have papilledema so retrobulbar optic neuropathy was suspected which was thought to be secondary to paraneoplastic syndrome.

Facial varicosity affecting the lower eyelid of a horse

Summary A 12-year-old Clydesdale cross mare was referred for investigation of right periocular vascular distension. Physical examination and ultrasonography confirmed the presence of a varicosity of the veins of the lower eyelid and transverse facial vein. The size of the varicose vein led to concerns about the potential progression in size of the lower eyelid to obstruct vision. Percutaneous encircling sutures were ineffective at occluding the vessel and surgical excision of the abnormal vein was performed. This treatment approach proved effective and 7 months post operatively the swelling has not recurred. This case demonstrates that varicosities can be successfully surgically resected in horses if there is a clinical indication.

Malignant Cerebral Venous Sinus Thrombosis in Polycythemia.

Malignant Cerebral Venous Sinus Thrombosis in Polycythemia.

Trigeminal neuralgia due to neurovascular conflicts from venous origin: an anatomical-surgical study (consecutive series of 124 operated cases).

Veins as the source of trigeminal neuralgias (TN) lead to controversies. Only a few studies have specifically dealt with venous implication in neurovascular conflicts (NVC). The aim of this study was the anatomical-surgical description of the compressive veins found during micro-vascular decompression (MVD). Patients retained were those in whom a vein was considered compressive, alone, or in association with an artery. The study defined the type of vein involved, its situation along, the location around the root, and management. For this study, denomination of veins in relation with the root was revisited. Of the 326 consecutive patients who underwent MVD from 2005 to 2013, 124 (38.0 %) had a venous conflict, alone in 29 (8.9 %), or in association with an artery in 95 (29.1 %). The compressive veins belonged to one of the two venous systems described: the superficial or the deep superior petrosal venous system (sSPVS or dSPVS). A vein from sSPVS was found compressive in 81 cases (59.6 %), for the major part it was the pontine affluent of the superior petrosal vein (48 cases). The conflict was situated at TREZ in 28.4 %, mid-cisternal portion in 50.6 %, and porus in 8.6 %. The dSPVS was found compressive in 55 cases (40.4 %), almost always a transverse vein at porus (51 cases). Decompression was coagulation-division of the conflicting vein in 36.8 % and simple cleavage in the other. The study shows the frequent implication of veins in NVC as the source of TN. NVC are not only at TREZ but also at mid-cisternal portion and porus of Meckel cave.

Central Venous Access via External Jugular Vein with CT-Venography Using a Multidetector Helical 16-Section CT

ABSTRACTObjective: To determine the success rate and complications of using the external jugular vein (EJV) for central venous access with a preoperative estimate of the detailed anatomical orientation of the cervical venous plexus using computed tomography venography (CT-V). Design: Prospective, observational human study. Setting: Surgical intensive care unit. Patients: Fifty-two patients who were undergoing EJV cannulations with CT-V using a Multidetector Helical 16-section CT (MDCT). Intervention: The preoperative anatomical estimation of the cervical venous plexus was performed with CT-V using an MDCT. In particular, the angulation between the EJV and the right subclavian vein (SCV) was measured. The anatomical abnormalities and the angulation between the EJV and the anterior jugular vein (AJV), transverse cervical vein (TCV), and suprascapular vein (SSV) were estimated. Measurements and Main Results: The success of CT-V was achieved in 52 of 52 patients (100%). The mean angulation between the right EJV and the right SCV was 144 ± 36 degrees in the obtuse-angle cases (88%) and 72 ± 28 degrees in the sharp-angle cases (12%). A plexus of veins under the clavicle was most commonly responsible for insertion of the central venous catheter (CVC). The EJV approach resulted in a 93% rate of successful cannulations. No complications of pneumothorax or carotid artery puncture occurred during insertion procedures. Conclusions: The EJV route is associated with comparable technical success and lower major procedural complication. The EJV approach with CT-V guidance is an option as the initial method when central venous cannulation must be performed under suboptimal conditions.

Fetal Isolated Prominent Left Brachiocepalic Vein

The objectives of this series were to describe the prenatal sonographic findings of a fetal isolated prominent left brachiocephalic vein with its in utero natural history and neonatal outcome and to discuss the differential diagnosis, especially with a total or partial anomalous pulmonary venous return malformation. We reviewed all cases referred to 2 tertiary medical centers with the presenting finding of a prominent, upper thorax transverse vein entering the superior vena cava. The primary suspicion of a subjective dilated left brachiocephalic vein, as a part of a supracardiac anomalous pulmonary venous return malformation, was investigated by a systematic anatomic evaluation. After exclusion of other cardiac and structural anomalies, we followed the pregnancies and their outcomes. Eight cases were recruited during a 7 year period. The mean maternal age was 31 years, and the mean gestational age at the time of diagnosis was 17 weeks. In 7 cases, the dilatation was not evident during 6 weeks of follow up. In 1 case, the dilatation was evident until delivery at 39 weeks and was not apparent on postnatal echocardiography or spiral computed tomography. All neonates developed without any heart or other complications. We conclude that after exclusion other malformations, a prominent left brachiocephalic vein is a benign transient phenomenon that does not persist post-partum in the neonate.

Computational Simulation-Based Vessel Interposition Reconstruction Technique for Portal Vein Hypoplasia in Pediatric Liver Transplantation

BackgroundTo enhance the technical feasibility of portal vein (PV) interposition grafting for pediatric PV hypoplasia, we performed a computational simulation to establish a customized surgical technique allowing a secure anastomosis of an iliac vein graft to a severely hypoplastic PV stump. MethodsBased on the literature and on our own experience with reconstruction of PV hypoplasia, we devised three types of recipient PV stump preparations and three types of interposition vein grafts, yielding five technically feasible combinations. ResultsThe computational simulation model for PV reconstruction using an interposition vein graft revealed the most feasible combination to be a sequential inverted-T incision to the confluence of the superior mesenteric vein and splenic vein with a longitudinal slit in the transverse vein graft end, the technical feasibility was validated by an artificial suture model. This reconstruction was clinically applied to treat a 7.2-kg 10-month-old female patient with biliary atresia and a severely hypoplastic PV. The PV reconstruction was successful; the patient recovered uneventfully. ConclusionsWe have presented a simplified surgical technique for PV interposition that is applicable to pediatric PV hypoplasia, which also appears to be a feasible option for pediatric liver transplantation.

Effectiveness of the Trapezius Vein in the Reconstruction of Intraoral Defects With Bare Neck

In head and neck cancer reconstruction, the transverse cervical artery is a good alternative vessel when the appropriate recipient vessels cannot be identified because of preoperative radiation and radical neck dissection. Selecting the appropriate recipient vein is essential for a successful intraoral reconstruction. We attempted to determine which veins are candidate partners of the transverse cervical artery by anatomically examining 10 necks (2 sides of the neck in 5 cadavers) in a cadaver study. Three types of veins (suprascapular vein, transverse cervical vein, and descending vein from the trapezius muscle) were selected as recipient vein candidates, and the characteristics of each vein were analyzed. Clinically, we also examined which vessels were chosen as recipient veins in 13 patients in whom intraoral reconstruction with bare neck was performed using the transverse cervical artery as recipient. The descending vein from the trapezius muscles (trapezius vein) was used most frequently, followed by the transverse cervical vein. The transverse cervical vein could be considered an appropriate recipient vein, but it is prone to damage from neck dissection in some cases. Therefore, the use of the trapezius vein can aid in the successful reconstruction in such patients.

Study on Nanomechanical Properties of Dragonfly Wing

The flight mechanics of dragonflies including hovering and taking off backwards, flight sideways and vertical directions has been attentions in Bionics. The dragonfly wing consists of the networks of various veins and membranes to make the structural properties complicated. In the past investigations, surface characteristics of dragonfly wing were measured by nanoindentation test. Thus the aim of this study will comprehensively concern the nanomechanical properties of veins, membrane and pterostigma of the wing of the dragonfly with nanoindentation. In the mean time, the modulus and hardness of the wing of the dragonfly’s composites including lengthwise vein, transverse vein, membrane and pterostigma are measured. The value of modulus of lengthwise vein is greater than the other structures. The value of modulus of transverse vein is the smallest due to its soft behavior. Its hardness is also smaller than others.

First record of the leafhopper genus Yangida Dworakowska (Hemiptera: Cicadellidae: Typhlocybinae: Zyginellini) from China, with description of one new species

Zyginellini is a smaller tribe in Typhlocybinae. Species in this tribe feed on trees and shrubs, and some species harm economic crops. Examples include as Zyginella mali (Yang) and Zyginella minuta (Yang) which damage apple trees. Members in this tribe usually have bright coloration, distinct patches and spots. Most lack ocelli. Compared with other tribes of Typhlocybinae, the main diagnostic characters of Zyginellini are: vannal veins in hindwing separate apically, only one transverse vein visible and submarginal vein extended directly to vein Cu1, forming one open cell. This tribe is related to Typhlocybini. The Zyginellini leafhopper genus Yangida was erected by Dworakowska (1994) with Yangida basnetti Dworakowska from Sikkim, as its type species. There have been no further reports on this genus. In this paper, we describe the second species, Yangida fasciata sp. nov. from China. The type specimens of the new species are deposited in the collections of the Entomological Museum, Northwest A & F University, Yangling, China.

Leaf vascular systems in C(3) and C(4) grasses: a two-dimensional analysis.

It is well documented that C(4) grasses have a shorter distance between longitudinal veins in the leaves than C(3) grasses. In grass leaves, however, veins with different structures and functions are differentiated: large longitudinal veins, small longitudinal veins and transverse veins. Thus, the densities of the three types of vein in leaves of C(3) and C(4) grasses were investigated from a two-dimensional perspective. Vein densities in cleared leaves of 15 C(3) and 26 C(4) grasses representing different taxonomic groups and photosynthetic subtypes were analysed. The C(4) grasses had denser transverse veins and denser small longitudinal veins than the C(3) grasses (1.9 and 2.1 times in interveinal distance), but there was no significant difference in large longitudinal veins. The total length of the three vein types per unit area in the C(4) grasses was 2.1 times that in the C(3) grasses. The ratio of transverse vein length to total vein length was 14.3 % in C(3) grasses and 9.9 % in C(4) grasses. The C(3) grasses generally had greater species variation in the vascular distances than the C(4) grasses. The bambusoid and panicoid C(3) grasses tended to have a denser vascular system than the festucoid C(3) grasses. There were no significant differences in the interveinal distances of the three vein types between C(4) subtypes, although the NADP-malic enzyme grasses tended to have a shorter distance between small longitudinal veins than the NAD-malic enzyme and phosphoenolpyruvate carboxykinase grasses. It seems that C(4) grasses have structurally a superior photosynthate translocation and water distribution system by developing denser networks of small longitudinal and transverse veins, while keeping a constant density of large longitudinal veins. The bambusoid and panicoid C(3) grasses have a vascular system that is more similar to that in C(4) grasses than to that in the festucoid C(3) grasses.

Potassium and lactate uptake by noncontracting tissue during strenuous exercise.

Efflux of potassium (K+) and lactate (lac-) from active skeletal muscle during high intensity exercise leads to increased plasma [K+] and [lac-] in venous and arterial blood. The exercise-induced increases in these ions in human athletes is ameliorated, in part, by uptake by noncontracting tissue, reflected by an increase in the arteriovenous difference across these tissues from rest to exercise. To test the hypothesis that these ions are taken up by noncontracting tissue in strenuously exercising horses, plasma [K+] and [lac-] were measured in blood samples collected simultaneously from the carotid artery (CA), femoral vein (FV), and transverse facial vein (TFV) in 5 unconditioned Standardbred horses performing 4.5 min of strenuous treadmill exercise. Further, the arteriovenous differences ((a-v)diff) in [K+] and [lac-] were calculated across active tissue (CA-FV) and noncontracting tissue (CA-TFV). After 3 min of strenuous exercise, plasma [K+] in FV blood (mean +/- s.e. 7.1 +/- 0.2 mmol/l) was greater (P<0.05) than in CA blood (6.8 +/- 0.2 mmol/l) and both of these concentrations were greater (P<0.05) than a value of 5.7 +/- 0.1 mmol/l in TFV blood. Similarly, plasma [lac-] increased to 20.6 +/- 0.8 and 21.1 +/- 0.8 mmol/l in CA and FV blood, respectively, and these concentrations were greater (P<0.05) than a value of 19.1 +/- 0.8 mmol/l in TFV blood. The magnitude of the (a-v)diff for both [K+] and [lac-] increased (P<0.05) across active and noncontracting tissue during high-speed exercise but the directions were opposite, supporting release by active tissue and uptake by noncontracting tissue. These results confirm that uptake of K+ and lac- by noncontracting tissue contributes to regulation of the plasma concentrations of these ions in strenuously exercising horses.

Transverse Vein Differentiation Associated with Gas Space Formation—Fate of the Middle Cell Layer in Leaf Sheath Development of Rice

In monocotyledons, the leaf vascular network consists of a hierarchical sequence of vertical vascular bundles and numerous transverse veins that interconnect adjacent vertical veins. In the leaf sheath of these species, especially grasses, lysigenous gas cavities (gas spaces) are developed into intervascular spaces and provide a gas conducting system to non-aerial parts under flooded conditions. The spatial relationship between gas space formation and transverse vein differentiation was investigated using the leaf sheath of rice (Oryza sativa L.). Histochemical observation showed that patterns of differentiation of the transverse vein are distinct from those of vertical vascular bundles. On the other hand, gas spaces are formed through the processes of cell death (collapse). Both events are initiated at a specific cell position in the middle layers of the leaf sheath, from which the vascular system of the leaf is derived; this indicates that differentiation of transverse veins is associated with gas space formation. The cell-to-cell movement of fluorescein isothiocyanate-conjugated dextran injected into middle layer cells coincided with the area where cell collapse occurred, indicating a close relationship between the middle and adaxial cell layers, but not abaxial cell layers. A uniform cell number between each transverse vein in the leaf sheath suggested the involvement of spatial regulation in transverse vein formation regardless of clonal history at the later stage of leaf vein canalization.

Redescription of Calohelcon Turner (Insecta: Hymenoptera: Braconidae), description of a new species, and a reappraisal of the significance of certain character states in the Helconinae

Calohelcon obscuripennis Turner is redescribed and illustrated for the first time. Calohelcon roddi n.sp. from New South Wales is described, illustrated and differentiated from C. obscuripennis. The hindwing of C. roddi possesses a distinct transverse vein m-cu, a feature unknown in any other Helconinae but present in many members of the 'cyclostome' subfamilies Doryctinae and Rogadinae, and in the apparently related Alysiinae, Betylobraconinae, Gnamptodontinae, Histeromerinae, Opiinae and Telengaiinae. The presence of hindwing vein mcu is interpreted as a plesiomorphous character state in the 'cyclostome' assemblage, but it is suggested that the presence of m-cu in some Calohelcon, represents a re-expression of genetic information, the expression of which had been previously suppressed. The phylogenetic significance of a number of other features of Calohelcon, and of Helconinae in general, are discussed. QUICKE, D.L.I. & G.A. HOLLOWAY, 1991. Redescription of Calohelcon Turner (Insecta: Hymenoptera: Braconidae), description of a new species, and a reappraisal of the significance of certain character states in the He1coninae. Records of the Australian Museum 43(2): 113-121. 113 Recently major advances have been made in our understanding of the phylogenetic relationships between the subfamilies of Braconidae (Capek, 1970; van Acterberg, 1984; Sharkey, personal communication), although there is as yet no clear consensus of opinion, and several subfamilies are problematical. Application of Hennigian cladistics (Hennig, 1966) has proved invaluable in that by consistently differentiating between

Esophageal reconstruction using microvascular anastomasis to the thoracoacromial artery and cephalic vein

For reconstruction of the pharynx and cervical esophagus following pharyngolaryngoesophagectomy, free gut transfer revascularized to such cervical vessels as the cervical transverse artery and external jugular vein is commonly performed. However, for reconstruction of the esophagus in the cervicothoracic junction or anterior to the chest wall, using the cervical vessels has more disadvantages than using the vessels in the chest wall. Thus, we developed a method of using the throracoacromial artery and cephalic vein for vascular anastomoses of a free jejunal graft and report herein our results in six cases. Three of these cases underwent reconstruction for an esophageal defect anterior to the chest wall, while the other three underwent reconstruction of the thoracic esophagus using a colonic pedicle graft. Satisfactory results were obtained in five of the six cases. Therefore, we recommend the use of the thoracoacromial artery and cephalic vein in vascular anastomoses during a free gut transfer or colonic pedicle graft for reconstruction of the esophagus anterior to the chest wall.

Arteriovenous Fistula Following Thyroidectomy Presenting with Cardiac Failure—A Case Report

An arteriovenous fistula between the thyrocervical trunk and the transverse cervical vein is described, diagnosed four years after thyroidectomy. This unu sual fistula produced signs of cardiac failure and the bruit was discovered on careful physical examination. Although a systolic/diastolic bruit may be gener ated by arterial occlusive disease of the carotid artery, the presence of a continu ous cervical bruit in close proximity to a scar should suggest an arteriovenous fistula.