What is Nakata index?
Nakata index is the sum of the cross-sectional area of the pulmonary arteries divided by the body surface area. Results: During cardiac catheterisation prior to Glenn procedure, the mean Nakata index was 351.9 (range 131.2-886) mm2/m2 and was higher in patients with increased pulmonary flow (p = 0.0135).
What is Glenn shunt surgery?
The Glenn procedure redirects blood flow from the upper body to the lungs. In the Glenn procedure: The superior vena cava (SVC) (which brings blood back from the upper part of the body) is disconnected from the heart and connected directly to the pulmonary artery.
What does a BT shunt do?
A Blalock-Taussig (BT) shunt is a small tube, only a few millimeters wide, that is used to create a pathway for blood to go from the arterial circulation to the lungs. It is used to treat congenital heart defects that affect blood flow to the lungs.
What is pulmonary artery pulsatility index?
Background: The pulmonary artery pulsatility index (PAPi), defined as the ratio of pulmonary artery pulse pressure to right atrial pressure, emerged as a powerful predictor of right ventricular (RV) failure in patients with acute inferior myocardial infarction and those undergoing left ventricular assist device …
What is a normal Fontan pressure?
Typical pressures in a well compensated young patient with a Fontan circulation are a CVP (mPAP) of 12 mm Hg and atrial pressure of 5 mm Hg, so giving a transpulmonary pressure gradient of about 7 mm Hg.
What is a super Glenn?
To stimulate left ventricular growth, we have utilized the concept of ‘Super Glenn’—connecting one lung to the superior vena cava, utilizing a shunt [either aortopulmonary or right ventricle to pulmonary artery (PA)] for the contralateral lung, separating the two branch pulmonary arteries and performing fenestrated …
What is a normal Glenn pressure?
Bidirectional Glenn Operation This generally results in arterial saturations between 75% and 85%, an SVC pressure of 10 to 12 mmHg, and an atrial pressure of 5 to 6 mmHg. SVC pressure exceeding 16 mmHg or a transpulmonary gradient exceeding 8 to 10 mmHg should prompt critical appraisal of the anastomosis.
Is the Blalock-Taussig shunt still used?
The Blalock–Thomas-Taussig shunt is used in the first step of the three stage palliation (The Norwood Procedure)….
| Blalock–Taussig shunt | |
|---|---|
| Specialty | Cardiothoracic surgery |
| Uses | Pulmonary atresia, Tetralogy of Fallot |
How do you calculate pulmonary artery pulsatility index?
PaPi was calculated as [(systolic pulmonary artery pressure-diastolic pulmonary artery pressure)/right atrial (RA) pressure]. Univariate analysis was performed to identify baseline predictors of RVF.
What should the Nakata index be for ecfo?
In 13 patients (22%) with a low Nakata index (under 200 mm2/m2, lowest 125 mm2/m2), the presence of a normal total lower lobe index (>90 mm2/m2) enabled us to successfully perform ECFO combined with enlargement of the main pulmonary arteries in six of them [2].
How is the Nakata index related to vascular risk?
The authors have suggested that PA size at the hilum could be a good representative of the whole PA vascular bed. In the presence of low Nakata index, the normal LLI would automatically classify all these patients to be no longer in a risk category [4].
Is the Nakata index predict outcome After Fontan operation?
We use LLI as being more predictive to evaluate adequacy of the pulmonary vascular tree, given that central pulmonary arteries used for calculation of Nakata index can be enlarged before or during a Fontan operation [4]. The lowest Nakata index that precludes a successful Fontan operation is not known [5].
Which is less informative the LLI or the Nakata index?
From our point of view the predictive value Nakata index is less informative than the lower lobe index (LLI) which was introduced to optimize preoperative selection of Fontan candidates [2–4].