I though of it more closely, read a few articles and concluded that in fact 'assi' is redundant. It simply means 'veins' or venous system, if you will. You may also go a step further and say branches, but I think just veins suffices.

[Contribution of Doppler investigations of the deep venous axes to ... - [ Traduire cette page ]
de F Dany - 1982
[Contribution of Doppler investigations of the deep venous axes to the ... return in right heart cardiopathies, respiratory disease and abdominal surgery. ...
www.ncbi.nlm.nih.gov/pubmed/7037804Reperméabilisation des gros troncs veineux supérieurs : un nouveau ...
de Y Boudjemline - 2005 - Autres articles
... to repermeabilize venous axes before the placement of a new central line. .... Intravascular stents in congenital heart disease: short- and long-term ...
linkinghub.elsevier.com/retrieve/pii/S0929693X04006621 - Pages similairesAmazon.com: General Ultrasound in the Critically Ill ... - [ Traduire cette page ]
... venous system, head, heart, and the most original topic, the lung. ... urinary probe, venous axes, parasternal route, checked using ultrasound, ...
www.amazon.com/dp/3540208224 - En cache[PDF] The Venous Valve and Primary Chronic Venous Disease
Format de fichier: PDF/Adobe Acrobat
Venous valves appear in the embryo after the heart begins to beat and the ...... tinence of the venous axes is not always associat- ...
www.medicographia.com/html/static/html/issues/.../revue.pdf - Pages similairesUpper limb deep vein thrombosis: update on risk factors in ... - [ Traduire cette page ]
de P Di Micco - 2007 - Cité 1 fois - Autres articles
Although ultrasound scan of venous axes of upper limb associated with compression ... chronic heart failure or neurological disease) increase the risk to ...
www.cancer-therapy.org/.../43._Di_Micco_et_al,_391-394.html - En cacheMelanoma with Metastases - [ Traduire cette page ]
Angiosarcoma Sarcoma - a Rare Tumour of the Heart ... area are compressing the venous axes, although without causing thrombotic phenomena currently; ...
www.m-opinion.com/Melanoma_Metastases/?... - En cache - Pages similaires[PDF] PII: 0022-4804(79)90093-3 - [ Traduire cette page ]
Format de fichier: PDF/Adobe Acrobat - Afficher
de FE Eckhauser - 1979 - Autres articles
trosplenic venous axes (pancreatico-portal dissociation). ' This research was supported by RAAGS and by. Michigan Heart Foundation Grant 341095. ...
deepblue.lib.umich.edu/bitstream/2027.42/23638/1/0000602.pdfSupport stocking - US Patent 6216495 Description - [ Traduire cette page ]
The plantar venous axes are directly connected to the posterior tibial veins .... return and liquid movements to the left heart, decreases venous stasis, ...
www.patentstorm.us/patents/.../description.html - En cache - Pages similairesBahren types III and IVa testicular vein anomalies as a reason for ... - [ Traduire cette page ]
de F Forte - 2002 - Cité 3 fois - Autres articles
... from the confluence of two major venous axes, a ventral glandular one, .... Am Heart J 49 318. 2. Bahren W, Lenz M, Porst H, Wierschin W (1983) ...
www.springerlink.com/index/NT67256P91R4LL30.pdf - Pages similaires[PDF] Notions of the cardiovascular system - [ Traduire cette page ]
Format de fichier: PDF/Adobe Acrobat - Afficher
When the major venous axes are being treated, it is extremely important that no ... rior vena cava and heart, because of the muscular pumping mechanism. ...
www.stacommunications.com/journals/diagnosis/2001/08.../whc...

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Sorry Joseph !
I don't know why so many "page unfound".
Basically I just googled "venous axes"

http://www.ncbi.nlm.nih.gov/pubmed/7037804 :

J Chir (Paris). 1982 Feb;119(2):123-33.

[Contribution of Doppler investigations of the deep venous axes to the prevention and diagnosis of thrombo-embolic disease (author's transl)]
[Article in French]

Dany F, Kim M, Roulet MD.

Abstract
The venous disease study by Doppler ultrasound technique provides a precious help to its diagnosis because the dubiousness and limits of clinical examination. The main indications of Doppler ultrasound deep veins examination are: --early diagnosis of thrombophlebitis, venous insufficiency and arterio-venous fistulae. --a non invasive monitoring of medical or surgical treatment of venous pathology and best appreciation of venous return in right heart cardiopathies, respiratory disease and abdominal surgery. --help in central venous catheterization. The sensibility of Doppler ultrasound in venous thrombosis is 86.5% and its specificity 91% in a study of 110 patients with comparison Doppler-venography. These results quite comparable with other studies, indicate a poor sensibility for the diagnosis of distal thrombi or partially occluding clots. In association with other non invasive examination Doppler ultrasound allows a better indication of phlebography in the detection of thrombophlebitis in high risk patients as well as a post operative survey with high sensitivity and good efficiency.

(scritto da Francesi....)

This is written by FR as well:
Fait clinique
Reperméabilisation des gros troncs veineux supérieurs : un nouveau défi pour la cardiologie interventionnelle pédiatrique
Successful recanulization of superior venous vessels: a new challenge for interventional pediatric cardiology





References and further reading may be available for this article. To view references and further reading you must purchase this article.


Y. Boudjemlinea, , , G. Agnolettia, J. Merckxb, M. Ouachee-Chardinc, C. Chalouid, D. Bonneta and D. Sidia

aService de cardiologie pédiatrique, hôpital Necker–Enfants-Malades, Assistance Publique, Hôpitaux de Paris, 149, rue de Sèvres, 75015 Paris, France

bService d'anesthésie–réanimation, hôpital Necker–Enfants-Malades, Assistance Publique, Hôpitaux de Paris, 149, rue de Sèvres, 75015 Paris, France

cService d'immunohématologie, hôpital Necker-Enfants-Malades, Assistance Publique, Hôpitaux de Paris, 149, rue de Sèvres, 75015 Paris, France

dService de pédiatrie générale, hôpital Necker–Enfants-Malades, Assistance Publique, Hôpitaux de Paris, 149, rue de Sèvres, 75015 Paris, France

Received 13 November 2003; accepted 14 December 2004. Available online 3 February 2005.

Résumé
L'utilisation de cathéters veineux centraux à demeure est de pratique courante dans les maladies chroniques en pédiatrie. Les complications thrombotiques réduisent progressivement le capital veineux central et compliquent la prise en charge à long terme.

Observation. – Nous rapportons deux cas d'obstruction des troncs veineux supérieurs et discutons des techniques employées pour reperméabiliser ces axes veineux avant la mise en place d'un nouveau cathéter à demeure.

Conclusion. – Le contrôle de la perméabilité des veines devrait être fait avant tout retrait ou changement d'un cathéter veineux central à demeure, la reperméabilisation des axes veineux centraux étant plus simple lorsque le cathéter central est en place dans le vaisseau thrombosé.

Abstract
The use of long-term central venous catheters is a routine in chronic pediatric diseases. Thrombotic complications progressively reduce the central venous capital and hamper the long-term management of these patients.

Observation. – We report two cases of obstruction of the central upper venous system and discuss of the techniques used to repermeabilize venous axes before the placement of a new central line.

Conclusion. – The control of the permeability of the central veins should be performed before any withdrawal of central catheters, repermeabilization of the venous axes being simpler when the central catheter is kept in place in the occluded vessel.

Mots clés: Cathétérisme interventionnel; Cathéter veineux central; Thrombose


This is Spanish:
www.phlebolymphology.org/wp-content/pdf/Phlebolymphology45....

So Italian, French and Spanish physician are all wrong :)

Ah...this is also wrong, since German:

Artery-vein separation (AVS) tools are currently under development by the major MRI equipment manufacturers as well as by independent providers. They will be primarily based on semiautomatic methods. In these procedures, the central arterial and venous axes have to be identified by manual placement of seeds. After this has been done the software automatically separates arteries from the veins by a level-set framework and segmentation algorithms. Requirements of AVS software tools are a minimum of user interaction, a high speed for the post-processing process compatible with diagnostic clinical routine, and high quality – combined with reproducibility of the post-processing results.



What about this one which is American ?:

· CAT scan of brain, neck, chest and abdomen with contrast medium: “In left area of neck, lymphadenopathic mass from level 4 to the axillary glands; the anteroposterior and laterolateral diameters of the initial lymphadenopathic conglomerate are 7 cm and 3.5 cm; in the left axillary region there are multiple lymphadenomegalies, the maximum being approximately 25 mm; the lymph nodes described in the laterocervical-retroclavicular and left axillary area are compressing the venous axes, although without causing thrombotic phenomena currently; solid tissue of pyramidal appearance in anterosuperior mediastinum related to thymic residue.” Total-body PET: “Various hyperfixation areas attributable to adenopathies, partially confluent in the conglomerate, in the laterocervical, subclavicular and left axillary regions, as well as left subscapular and bilateral intercostal areas, with an area of intense fixation of neoplastic significance (SUV max 14.1 diameter 33 mm) in cutaneous and subcutaneous regions in left paramedian area of trunk.” Oncology visit: “Chemotherapy with Cisplatin, Vinblastin and Decarbazine (CVD regimen) is felt to be indicated, in combination with immunotherapy with Interferon alpha-2b, three million units three times a week subcutaneously. Indication of prophylactic antithrombotic therapy should also be evaluated for the compression of venous axes in the neck and left axillary region.”

(from: http://www.m-opinion.com/Melanoma_Metastases/?cat_id=1)


This is a US patent; I don't know if it helps ?
http://www.patentstorm.us/patents/6216495/description.html


In any case, you're right: on PubMed, all papers using "venous axes" are French ☺☻☺☻

Buona serata J.