Lobectomy with angioplasty: which is the best technique for pulmonary artery reconstruction?
Review Article

Lobectomy with angioplasty: which is the best technique for pulmonary artery reconstruction?

Jacopo Vannucci, Alberto Matricardi, Rossella Potenza, Mark Ragusa, Francesco Puma, Lucio Cagini

Department of Thoracic Surgery, University of Perugia Medical School, Perugia, Italy

Contributions: (I) Conception and design: F Puma, J Vannucci; (II) Administrative support: A. Matricardi; (III) Provision of study materials or patients: R Potenza; (IV) Collection and assembling of data: M Ragusa; (V) Data analysis and interpretation: L Cagini; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors.

Correspondence to: Jacopo Vannucci, MD, PhD. Department of Thoracic Surgery, University of Perugia Medical School, Perugia, Italy. Email: jacopovannucci@tiscali.it.

Abstract: Lobectomies with bronchial and/or vascular reconstruction are conservative procedures aimed at managing locally advanced lung cancer, avoiding a pneumonectomy. Considering morbidity, mortality and the functional consequences of a pneumonectomy, such procedures must be in the technical armamentarium of every thoracic surgeon. Vascular reconstruction of the pulmonary artery (PA) is seldom performed with or without the bronchial sleeve resection. Both functional and oncologic outcomes have been reported to be better than after a pneumonectomy. Different technical options are now available but some aspects and technical details are not standardized. Indications, possible complications, planning and even definitions need to be more solid to allow for definitive improvement in such procedures. This analysis is aimed at assessing the acquired technical data with special emphasis on the PA reconstruction with autologous tissues.

Keywords: Pulmonary artery (PA); lung cancer; angioplasty; surgery

Submitted Jan 13, 2018. Accepted for publication May 28, 2018.

doi: 10.21037/jtd.2018.05.174


Lobectomies with bronchial and/or vascular reconstruction are conservative procedures aimed at managing locally advanced lung cancer, avoiding a pneumonectomy. A conservative procedure with bronchial and/or vascular reconstruction, when feasible, is to be considered mandatory, provided that a radical resection can be achieved (1). Pulmonary angioplasty can be accomplished with different techniques according to the specific situation and the surgeon’s experience.

Despite the considerable evolution of these procedures, there is still no standard method and, the advantages and disadvantages of the available materials used for reconstruction are debated, as are those regarding several procedural steps (2).

This analysis is aimed at examining this topic, in particular the definitions, incidence, results, complications and spectrum of techniques available, in order to assess the acquired oncological and technical data.

Lobectomy with pulmonary artery (PA) reconstruction

The definition is unclear and not widely accepted. In literature, there is a large variety of inclusion criteria used to define a lobectomy with PA reconstruction. In some case series, even a simple tangential resection of the PA is considered to be a reconstructive/plastic procedure while, alternatively, some authors believe that the term PA angioplasty should be reserved only for arterial sleeve resection, reconstruction with conduits or for patch reconstructions (3). Somewhere between the first, overly-simplistic definition and the second overly-restrictive one, a PA reconstruction could be defined as “any kind of arterial wall resection, repaired by a hand suture requiring a proximal clamp, placed after systemic heparinization” (4,5). We favor the latter definition because it seems to be the most suitable in describing the principles of these procedures.


Assessing incidence is impossible, firstly because there is not an accepted definition of these methods and secondly because there is a large variability in terms of frequency reported in published series. In any case, these procedures are performed uncommonly and roughly represent between a third and a quarter of all bronchial sleeve lobectomies. It has been estimated that, in thoracic surgery units devoted to conservative procedures, a PA reconstruction may be required in no more than 2% of all lobectomies (4,6).


Lobectomies with pulmonary angioplasty are more commonly performed on the left side, because of the anatomy of the left PA and, more specifically, owing to its relations with the left upper bronchus, and with the ipsilateral hilar and mediastinal nodal stations. The left PA is more frequently involved in two particular sites: (I) at the epibronchial level, proximally or distally to the first branch; and (II) at the intrafissural level, above the segmental artery for S6.

  • At the epibronchial level, the left PA wall can be involved directly by the tumor or by N1 nodes (when they are placed distally to the first PA branch), or by N2 nodes (if the artery is infiltrated at the level of station #5 whose nodes are located proximally to the first branch) (7,8). The need for PA reconstruction, when the vessel is involved at this level, occurs during left upper lobectomies.
  • At the intrafissural level, the left PA infiltration may involve the branches supplying the apicoposterior segment of the upper lobe or the segmental arteries for the lingula. A left upper lobectomy can be performed for PA involvement at this level with different reconstructive vascular procedures depending on the extent of the vascular infiltration. Sometimes, in centrally located cancers of the left lower lobe, the PA is involved at the level of the segmental artery for the S6. In such situations, an angioplasty is required in order to save the blood supply to the lingula, during a left lower lobectomy.

On the right side, the choice of conservative procedure of PA angioplasty is much less frequent. Sometimes the procedure is indicated for the involvement of the first branch of the right PA. The conservative procedure can be technically much more demanding than on the left side because the proximal clamp must be placed in a narrow space on the main right PA, below the superior vena cava.

Surgical oncology

A lobectomy with PA angioplasty is performed for locally advanced tumors which would otherwise necessitate a pneumonectomy to be removed. The oncological value is primarily related to the stage of disease and nodal status (9-12). Moreover, the tumor dimension, and the depth of the arterial wall infiltration have been associated with prognosis, in addition to the possible presence of neoplastic emboli (13).

Literature contributions regarding the value and feasibility of PA reconstruction in order to avoid a pneumonectomy first appeared in the late eighties and then increased in number and scientific impact (14,15). In the older literature, oncological results were reported to be worse than those associated with a standard lobectomy (16-18) but more recent articles show equivalent results to a standard lobectomy adjusted for stage (9,11,14,19-23), probably due to improvement in technique and experience with procedure. Concomitantly, there is a general agreement that conservative procedures lead to better results than pneumonectomies. Lausberg et al. report that PA reconstructions represent a middle point between bronchial sleeve resections and pneumonectomies when considering disease free survival and overall survival (24).


A lobectomy with PA reconstruction presents a number of possible complications such as lung infarction, bleeding, embolism, late PA stenosis, bronchovascular fistula and even cardiac dislocation at the site of pericardium harvesting (11,14,17,20,21,25-27). The incidence of these specific complications is quite variable in the different series, but since major or even lethal complications are possible, they must be carefully considered in preoperative surgical planning.

Most of these complications can be related to technical issues concerning the type of reconstruction and sometimes also the materials employed.


The basic steps of a lobectomy with pulmonary angioplasty are as follows: (I) complete hilar dissection and mediastinal lymphadenectomy; (II) establish that the procedure is oncologically suitable; (III) harvest the biological graft if one of these options is chosen; (IV) achieve full control of the main and distal PA: proximally with a Satinsky clamp and distally with a tourniquet or by clamping the inferior (or the residual) pulmonary vein (PV); (V) administer heparin intravenously prior to the PA occlusion; (VI) incise the PA wall to create a defect with even margins; (VII) ascertain the presence of tumor-free margins by frozen section.

Direct reconstruction

The three methods available for direct PA reconstruction include: (I) tangential resection with direct suture; (II) transverse suture; and (III) arterial sleeve resection and end-to-end anastomosis.

Tangential vascular reconstruction with direct suture

A tangential resection is only performed in the case of limited PA wall infiltration, when a simple tangential mechanically-stapled suture is unfeasible. The ensuing longitudinal defect may be some centimetres long; a running suture with 5-0 or 6-0 non-absorbable monofilament material is placed along the longitudinal axis of the PA. Stenosis is the primary complication of this procedure (Figure 1).

Figure 1 The direct suture is also called tangential resection and is a quick and undemanding procedure. However the suture must be carefully carried out to avoid a too narrow stenosis which is possible if this method is performed for large arterial defect.

Transverse suture

This technique is feasible only in case of minimal resection of the PA wall on its longitudinal axis. The PA wall defect is sutured transversely, using a 5-0 or 6-0 monofilament non-absorbable running suture. Stenosis is thus avoided, but this kind of repair lead to a kinking of the PA which may be particularly severe in case of wide arterial wall defect or if a bronchial sleeve lobectomy has been added to the PA reconstruction. This method is not recommended and other reconstructive techniques should be considered (Figure 2).

Figure 2 In very selected cases the stenosis could be avoided suturing transversally the PA defect. The result is a kinking of the PA which can be worse than stenosis. Morphological changes of the reconstructed PA is illustrated by Letters. PA, pulmonary artery. Opposite dots of the PA defect. A: proximal; B: distal; C: inner; D: outer.

Circumferential resection and end-to-end anastomosis

A circumferential resection with an end-to-end anastomosis should be considered when the resection involves over 50% of the vessel’s cross-sectional area, thus precluding the use of a patch reconstruction. Most of arterial sleeve resections are performed along with a bronchial sleeve resection. In this setting, we prefer to complete the bronchial anastomosis before the vascular one for several reasons: (I) to reduce the manipulation of the vascular suture; (II) the post-reconstruction airway length is shorter and the tension on the vascular suture is therefore reduced; (III) the bronchial suture is theoretically easier to perform when the PA is divided. This kind of procedure should only be performed when strictly necessary (28) because entails a higher risk for specific complications (Figure 3). When both bronchial and vascular sleeve resections are performed, release maneuvers are generally unnecessary. As already mentioned before, the airway is shortened by the bronchial sleeve resection and the vascular stumps can be approximated without any tension. When only a vascular sleeve resection is performed, an extended sub-adventitial dissection of the PA is recommended to reduce the tension on the vascular anastomosis. Other “release” maneuvers can be performed, including an intrapericardial vascular dissection with a U-shaped incision around the inferior PV (29). In this way, the whole lung may be shifted cranially for a few centimetres, thus reducing the need to place a conduit to a very small number of cases.

Figure 3 Complete sleeve resection is a dangerous procedure to be performed only when a patch reconstruction cannot be carried out because massive PA involvement. Indeed the PA wall is very fragile and it’s easy to tear it with the Prolene suture. Sometimes the use of a conduit can be justified for reducing the tension at the anastomotic level and for interposing a ring of solid tissue. PA, pulmonary artery.

Graft reconstruction

Autologous tissues should be favored and the pericardium is the most used material even though heterologous grafts have been used (30). Azygous vein is theoretically suitable and favorable but is seldom used because most procedures are performed on the left side (28). Concerning the use of the saphenous vein, the impossibility of knowing with certainty before the thoracotomy, whether a PA will be performed or not, precludes the use of this option (31). The PV recently proved to be a very satisfactory method of reconstruction due to the tissue characteristics (28). Among heterologous biografts, the bovine and porcine pericardium can be effective but more understanding is needed because few reports are available (30,32). A synthetic graft (polytetrafluoroethylene) is generally considered to be avoided as there is too much difference in consistency with the thin and fragile wall of the PA (33).

As already mentioned, most procedures and most published series of patients describe the technique of graft reconstruction using the autologous pericardium. The main advantage of the pericardium is that it is readily available in large amounts but its disadvantages cannot be overlooked: it is non-stable, not vascular tissue and tends to curl (34,35). Moreover, a prosthetic repair of the residual pericardial defect is often required. More recently, the autologous PV has been proposed as a suitable graft for the PA repair. The graft is harvested by a preliminary sub-adventitial dissection of the vein, conducted from the intrapericardial tract to the peripheral main branches. The PV is then sutured with a linear stapler intrapericardially, as close as possible to the left atrium, and ligated peripherally. All the tissue included between the intrapericardial stump and the peripheral branches is harvested and dipped in 0.9% saline solution. Very often, it is possible to obtain a 2-cm long autologous vein graft to be utilized both as patch or conduit (36). In patch angioplasty, the harvested PV is opened longitudinally and tailored to cover the defect. The vein patch is secured by a running suture, conducted between two stay stitches. In vascular sleeve resections without a bronchial sleeve, a short PV graft may be interposed. The intrapericardial edge of the graft is anastomosed first to the proximal PA stump. A moderate caliber discrepancy generally occurs (Figure 4).

Figure 4 The PA is proximally controlled with a Satinsky clamp. Bull dog and/or tourniquets are used for distal clamping. After removing the tumor, the defect is repaired with PV graft. Once sutures are completed, clamps are removed and the blood flow is restored. More specifically, (A) large defect of left PA; (B) reconstruction phase with PV graft; (C) final result after unclamping; (D) surgical specimen. PA, pulmonary artery; PV, pulmonary vein.


Various techniques are available for PA reconstruction (37). Small residual defects after a tangential resection should be repaired by direct re-approximation of the vessel edges, provided that the resulting stenosis is <50%. A low-grade PA stenosis has no hemodynamic effects, particularly in light of the lower blood flow demand of the residual lung after the lobectomy. In our opinion, the “transverse” angioplasty is a procedure to avoid. Theoretically, the PA kinking induced by such enlarging angioplasty and worsened by the cranial shift of the remaining lobe may cause hemodynamic consequences, such as flow reduction and turbulence, which are worse than a moderate stenosis.

In moderately large defects, patch reconstruction is mandatory when direct repair would produce a stenosis greater than 50% and provided that the PA defect is repairable (28). Biological tissue is the preferred choice. The use of autologous or heterologous pericardium have been described for PA reconstruction (20,32). However, autologous pericardium seems not to be the ideal material for PA repair because it shrinks and curls with consequential technical problems and possible postoperative complications (28). To avoid such problems, the same authors have proposed stiffening the pericardium using a glutaraldehyde solution (34).

Although our experience with a PV patch is in its preliminary stage, we consider the PV, harvested from the lobe to be resected, an excellent source of autologous tissue for PA reconstruction. The physical properties of the PV are superlative; histologically, the PV wall is a unique vascular tissue with favourable thickness, resistance and a solid consistency. The wall of the PV is composed of a thin endothelium, a media of smooth muscle, and a thick outer fibrous adventitia (38). The smooth muscle of the venous wall overlaps the atrial myocardium and this myocardial sleeve may be found up to the main branches of the superior PVs. When a pulmonary angioplasty has been scheduled, the PV of the lobe to be resected should be harvested, in view of its possible use, provided that it is free of tumor. The PV always supplies sufficient tissue for a patch reconstruction by simply opening its wall longitudinally. The use of a PV graft is of course not indicated in case of direct involvement of the vein by the tumor. On the basis of an experience of over 20 cases, we have never observed neoplastic recurrences on the site of the angioplasty repaired with the autologous PV.

Very rarely, a conduit must be interposed between the arterial stumps after a complete sleeve resection. In our opinion, the PV graft shows significant advantages over the autologous pericardium conduit: the technique is simpler, quicker and safer, and the tissue is more suitable. The mild caliber discrepancy between the PA and the PV graft has no hemodynamic consequences, provided that the patient has a suitable anatomy. A 1.5- to 2-cm graft is adequate because excessive length of the conduit is undesirable, due to the risk of kinking, turbulent flow and possible thrombosis.

The main limitation of the use of the PV for pulmonary angioplasty is related to the possible unfavorable anatomy which can limit the availability of large graft tissue (common left PV, short PV due to an early division of the culminal and lingular branches) (39-41). Therefore, it is not always possible to use the PV graft for a conduit repair, but by a correct graft harvesting, it is always possible to obtain enough tissue for a patch repair.


In small PA defects, consider using longitudinal direct suture only when a simple stapled suture is unfeasible and when the residual stenosis is <50%. In larger defects, avoid any transverse angioplasty in favour of an autologous patch repair (the autologous PV grafting should be considered only provided that the PV is far from the site of the cancer). When the resection involves over 50% of the vessel’s cross-sectional area, carry out a complete sleeve resection with an end-to-end anastomosis. Furthermore, in exceptional cases when a prosthetic conduit is needed, use an autologous PV graft, when suitable. Finally, perform a pneumonectomy if the reconstructive final result is unsatisfactory.




Conflicts of Interest: The authors have no conflicts of interest to declare.


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Cite this article as: Vannucci J, Matricardi A, Potenza R, Ragusa M, Puma F, Cagini L. Lobectomy with angioplasty: which is the best technique for pulmonary artery reconstruction? J Thorac Dis 2018;10(Suppl 16):S1892-S1898. doi: 10.21037/jtd.2018.05.174

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