Aortobifemoral Reconstruction during Pregnancy

C l i n M e d International Library Citation: Müller VA, Kasper AS, Hinterseher I (2015) Aortobifemoral Reconstruction during Pregnancy. Obstet Gynecol Cases Rev 2:028 Received: February 19, 2015: Accepted: March 25, 2015: Published: March 28, 2015 Copyright: © 2015 Müller VA. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Müller et al. Obstet Gynecol cases Rev 2015, 2:2


Introduction
Peripheral artery occlusive disease (PAOD) and mandatory revascularization procedures are very rare during pregnancy and need to undergo a precise risk evaluation.
There are several reports about percutaneous transluminal coronary angioplasty (PTCA) and coronary stent procedures in pregnant women [1,2].thirteenth gestation week without any problems.We performed a median laparotomy.The infrarenal aorta was at first only clamped tangentially to ensure some blood flow to the uterus.This turned out to be very difficult because of the very small calibre and some serious calcification of the aorta.We performed an end-to-side-anastomosis with the prosthesis (12 x 6 mm polyesterprosthesis, Dacron, Vascutek, a Terumo Company, Scotland UK) and the aorta.As the suture was not completely leak-proof at first, it needed to be a complete clamping of the aorta for a short period of time (six minutes).We did not need any blood transfusion.The time of operation was 280 minutes.During the operation a gynecologist monitored the fetus via ultrasound before and after clamping of the aorta and at the end of the operation.The fetus appeared to be vital and stable at all times.
The patient spent altogether six days on an intensive care unit and could be discharged from the hospital after the eleventh day.
The postoperative magnetic resonance tomography using optimized time of flight sequences without any contrast agent showed a good flow of the aorta, the prosthesis and the arteries of both legs (Figure 2).Six month later a caesarean section was performed (request of the patient) and a healthy girl had been born (3415g, 49cm, APGAR 9/10/10).
One year after the operation the patient presented herself to the outpatient clinic.The necrosis of the toes had healed completely and the patient was without any complaints.
Three years after the operation the patient needed to be treated for an incisional hernia in the median laparotomy.She received a fifteen times fifteen ultrapro open mesh repair using a sublay technique [3].

Discussion
Vascular intervention during pregnancy is rare.This is the first case report about a pregnant woman receiving aortobifemoral reconstruction during pregnancy.
With the increasing age and fertility of women the incidence of atherosclerosis in pregnancy will increase.By now, there are several reports about coronary artery disease or myocardial infarction in pregnancy.Cardiovascular diseases seem to complicate approximately 0.4% to 4% of all pregnancies [4].
Cardiac catheterizations also carry risks, but were reported to be performed rather safely in pregnancy [5].Appropriate abdominal shielding, use of a brachial or radial approach, and lower fluoroscopy times are important to minimize fetal exposure to radiation [6].It is common sense that nuclear imaging should be especially avoided during organogenesis (10 to 50 days) due to the risk of teratogenesis.In the second and third trimesters, nuclear imaging still poses a risk of intrauterine growth retardation and central nervous system abnormalities [7].
Today in high risk patients endovascular treatment of atherosclerosis is preferred but in this case of course it was not possible to shield the abdomen.This was one of the points why the decision which operation we should perform was so difficult.We had several ideas in mind: 1) The endovascular approach was not feasible because of the early stage of pregnancy and necessary high dosage of radiation and contrast medium and additionally because of the configuration of the stenosis.It did not look like that the left common iliac artery could be treated by endovascular therapy.Besides that, following the TASC (Trans Atlantic Inter-Society Consensus TASC II) Criteria we were dealing with a Type D lesion which has better long-term results with open revascularization [8].What also needs to bear in mind is that with a stent the patient would have needed an antiplatelet medication.Salicylates are able to cross the placenta and enter fetal circulation.High doses of acetylsalicylic acid are known to cause fetal complications including mortality, intrauterine growth retardation, bleeding abnormalities, neonatal acidosis and premature closure of the ductus arteriosus [9].There is not much known about the safety of other antiplatelet agents such as clopidogrel.The anticoagulant of choice during pregnancy is heparin, because it does not cross the placenta.2) A hybrid procedure with stenting the short stenosis on the right side in combination with a femoro-femoral crossover bypass from right to left was discussed as well.This would have been less invasive but not really suitable for a forty year old woman with an expected length of stay more than ten years.Also X-Ray and contrast agent would be needed.3) Another idea was to perform an axillobifemoral bypass subcutaneously.We abandoned this idea because of the expected growing of the abdomen.Additionally with this procedure the patient needs to be therapeutically anticoagulated.4) The aortobifemoral bypass is the standard procedure for this type of lesion.The aortobifemoral repair is the therapy with the best longterm results.We did not think that clamping of the aorta causes the fetus any harm because of the aorta being very stenotic at all and the internal iliac arteries and the uterine arteries were nourished mainly by multiple collaterals (Figure 2).Abdominal surgery during pregnancy has been reported to be safe.About two percent of women require surgery because of a non-obstetric reason during pregnancy [10].The most common non-obstetric operation during pregnancy is an appendectomy (44%), followed by a cholecystectomy (22.3%).Laparoscopy is safe even during pregnancy, with the known advantages of minimally invasive surgery, but it carries a higher miscarriage rate than laparotomy, with a comparable preterm birth rate [11].That is why we chose this kind of procedure although we knew that incisional hernias have a higher risk to develop in patients undergoing aortic surgery [12,13].

Conclusion
This report shows that major aortic surgery is feasible during pregnancy and should be performed if mandatory.

Figure 1 :
Figure 1: Magnetic resonance tomography prior to operation.The uterus and fetus is shown in the lower part of the abdomen.Pictures A to C are serial.A: shows the beginning of the occlusion of the left common iliac artery.B: shows a high-grade stenosis of the right common iliac artery and again the occlusion of the left one, additionally severe calcifications of the infrarenal aorta.C: shows that the right external iliac artery is open and that the left one is still occluded.

Figure 2 :
Figure 2: The postoperative magnetic resonance tomography with optimized time of flight sequences without any contrast agent showed a good flow of the aorta, the upper anastomosis (A), the prosthesis and lower anastomoses and the arteries of both legs (B).The image also shows the multiple collaterals to the uterus.