A novel versatile concept of cardioplegia delivery in cardiac surgery: The ReverseTWO cardioplegia circuit system.

Nowadays, the necessity of having a cardioplegia circuit capable of being adapted in order to administer different types of cardioplegia is strategically fundamental, both for the perfusionist and for the cardiac surgeon. This allows to avoid cutting tubes, guarantees sterility and, most of all, limits the number of cardioplegia circuits for the different strategies of cardiac arrest. The novel "ReverseTWO cardioplegia circuit system" is the development of the precedent "Reverse system" where mainly the 4:1 and crystalloid cardioplegia were used, It has the advantage of allowing immediate change of cardioplegia set-up versus four types of cardioplegia technique, when the strategy is unexpectedly changed before the beginning of cardiopulmonary bypass (CPB), is safe and enables the perfusionist to use one single custom pack of cardioplegia. Two pediatric roller pumps are usually used in our centre for cardioplegia administration; they have a standardized calibration (the leading with » inch and the follower with 1/8 inch) and the circuit consequently has two different tube diameters for the two different pumps. The presence in the circuit of two different shunts coupled with two different coloured clamps allows the immediate set-up for different cardioplegia administration techniques utilizing a colour-coding mechanism The aim of this manuscript is to present the new ReverseTWO Circuit. This novel system allows to administer four different cardioplegic solutions (4:1, 1:4, crystalloid, ematic) based on multiple tubes, which can be selectively clamped, identified through a color-coding method. The specificity of this circuit is the great versatility, which leads to numerous advantages, such as reduced risk of perfusion accident and reduced costs related not only to the purchase of different cardioplegia kits but also to the storage. https://youtu.be/ovJBE4ok2Ds.

Mycobacterium chimaera in heater-cooler units: new technical approach for treatment, cleaning and disinfection protocol.

Mycobacterium chimaera infections have mainly been associated with the heater-cooler unit (HCU) and, ultimately, linked to contaminated aerosols in the operation room. The contamination status of HCUs seems to be influenced by the maintenance, therefore, according to the manufacturer's recommendations, peracetic acid (Puristeril) was introduced to increase HCU cleaning and disinfection protocol maintenance. Aerosol dispersion from Puristeril during maintenance can cause adverse effects to nearby workers. We aim to describe our technique to reduce the impact of Puristeril on operating room staff and to limit dispersion of its aerosol in the environment by performing the cleaning procedure through a closed circuit.

The use of pupillometry in joint and connective tissue diseases.

The central and peripheral nervous systems are variably affected in the rheumatic diseases. Automated standardized infrared pupillometry allows the safe, noninvasive assessment of the pupillary innervation. Pupillometry has already been used in studying the autonomic nervous system (ANS) in various rheumatic diseases. In systemic lupus erythematosus, the irideal parasympathetic branch of ANS was more affected then the sympathetic branch. In Sjögren's syndrome, signs of pupillary parasympathetic denervation have been reported. In rheumatoid arthritis, pupil parasympathetic dysfunction has been shown to correlate with ocular dryness. In systemic sclerosis (SSc), both sympathetic and parasympathetic irideal impairment have been demonstrated. Beside providing autonomic innervation, sensory nerves fibers are able to control iris diameter. Exogenous ocular instillation of substance P (SP), a sensory neuropeptide, can determine an omathropine-resistant, non-cholinergic myosis, acting on specific receptors present on the iris sphincter muscle. We first studied pupillary SP-ergic responsiveness in SSc, evaluating substance P (SP)-stimulated pupillary diameters by pupillometry. A higher basal and SP-stimulated myosis was found in lSSc versus both dSSc and controls, whereas no differences existed between dSSc and controls. From the literature, the pupillary parasympathetic nervous system seems to be more affected than the sympathetic branch of ANS in the rheumatic diseases characterized by an inflammatory status. However, we found in SSc both sympathetic and parasympathetic pupil control to be equally impaired. From our experience, we conclude that pupillary nervous control is differently affected in the two subsets of SSc, and that the SP-ergic system seems to be impaired only in lSSc.

The autonomic nervous system in systemic sclerosis. A review.

The autonomic nervous system is an underestimated target of systemic sclerosis alterations. In this review we analyzed the major manifestations of its involvement, reconsidering the main theories of its pathogenesis.

Dimensions of psychological dysfunction in patients with fibromyalgia: development of an Italian questionnaire.

Our objective was to observe whether dysfunctional psychological dimensions of pain could be detected in fibromyalgia patients through the development of a new questionnaire. An original questionnaire composed of 51 items was given to 250 patients (185 females and 65 males, mean age 55+/-12.8 years) suffering from chronic fibromyalgia according to the criteria of the Multicenter Criteria Committee of the American College of Rheumatology. A Varimax computerized program of factorial analysis with orthogonal and oblique rotation of the axes was used to analyze the data. Five strong independent factors were identified: 1) catastrophizing and 2) external control beliefs (cognitive); 3) alexithymia (emotional); 4) restless behavior (behavioral); and 5) need for support (relational). Our questionnaire is a preliminary development of an Italian language psychological characterization of FM patients which may be a relevant and useful tool for the evaluation of the outcome of clinical/psychological treatment of FM.

Prophylactic activity of increasing doses of intravenous histamine in refractory migraine: Retrospective observations of a series of patients with migraine without aura.

BACKGROUND: Histamine is thought to play a pivotal role in the modulation of peripheral and central pain. The administration of increasing doses of histamine may lead to desensitization of receptors of histamine types 1 and 2, causing meningeal vasodilation, and to depletion of neuropeptides in the trigeminal ganglion, thus inhibiting the initiation of migraine. OBJECTIVE: In this study, the efficacy and tolerability of increasing doses of IV histamine in migraine prophylaxis were investigated. METHODS: This single-center, open-label, retrospective, controlled study was conducted at the Headache Center (Department of Internal Medicine, University of Florence, Villa Monna Tessa, Italy). Patients included in the study had 3 to 6 migraines without aura per month that were refractory to common symptomatic and prophylactic agents in the 6 months preceding the study. Patients were treated with IV histamine hydrochloride for 21 days starting with a dosage of 0.5 mg/d and increasing to 4.0 mg/d. To assess the efficacy of the treatment, these patients were matched for age; sex; and frequency, duration, and severity of attacks with untreated migraineurs. Clinical benefit was defined as ⩽ 1 migraine of mild intensity per month. Tolerability was assessed during the hospitalization period, and patients were instructed to contact the Headache Center to report any adverse effects after hospital discharge. RESULTS: The histamine group comprised 47 patients (40 women, 7 men; mean [SD] age, 42.0 [8.6] years) and the control group comprised 23 patients (20 women, 3 men; mean [SD] age, 38.8 [8.4] years). The histamine-treated patients showed a clinical benefit lasting for a mean of 10.4 (4.2) months, while the patients in the control group showed a clinical benefit of 3.8 (1.9) months. The difference in the duration of the clinical benefit between the 2 groups was 6.6 months (95% CI, 5.15-7.99). Adverse effects consisted of flushing, heat sensation during infusion, headache, and palpitations. CONCLUSIONS: In this study, histamine showed lasting prophylactic efficacy in migraineurs. If further research confirms this preliminary finding, histamine could be considered when established prophylactic drugs, such as betablockers, calcium antagonists, antidepressants, and antiepileptics, have not been effective.

Comparison of minimally invasive closed circuit versus standard extracorporeal circulation for aortic valve replacement: a randomized study.

To evaluate the clinical results of aortic valve replacement performed with a miniaturized closed circuit extracorporeal circulation (MECC) system and to compare it to standard cardiopulmonary bypass (CPB). One hundred and twenty consecutive patients undergoing isolated aortic valve replacement were randomly assigned to either a miniaturized closed circuit CPB with the maquet-cardiopulmonary MECC System (study group, n=60) or to a standard CPB (control group, n=60). Demographic characteristic and operative data were similar in the two groups. No hospital death occurred in either group and no difference in intensive care unit (ICU) stay and in-hospital stay was observed. Patients in the study group showed lower chest tube drainage (212+/-62 ml vs. 420+/-219 ml, P<0.05) and lower need for blood products (6.1% vs. 40.4%, P<0.05) than patients in the control group. Platelet count at ICU arrival was significantly higher in the study group (139+/-40 x 10(9)/l vs. 164+/-75 x 10(9)/l, P=0.05). Peak postoperative troponin I release was significantly lower in the MECC group (3.81+/-2.7 ng/dl vs. 6.6+/-6.8 ng/dl, P<0.05). In this randomized study the MECC system has demonstrated best postoperative clinical results in terms of need for transfusion, platelets consumption and myocardial damage as compared to standard CPB.

Minimally invasive closed circuit versus standard extracorporeal circulation for aortic valve replacement.

BACKGROUND: The purpose of this study was to evaluate the safety and clinical results of aortic valve replacement performed with minimally invasive closed circuit extracorporeal circulation technique (MECC system) versus standard cardiopulmonary bypass. METHODS: Forty consecutive patients undergoing isolated aortic valve replacement at a single institution were randomly assigned to either miniaturized closed circuit cardiopulmonary bypass with the Maquet-Cardiopulmonary (Rastatt, Germany) minimal extracorporeal circulation (MECC) system (study group B, n = 17) or standard cardiopulmonary bypass (control group A, n = 23). The MECC system is a low priming circuit without blood-air interface. Technical feasibility, in particular the potential entry of air in the circuit, and clinical results were prospectively evaluated. RESULTS: Demographic characteristics and surgical data were similar in both groups. Patients in the study group showed reduced chest tube drainage (217 +/- 62 mL vs 420 +/- 219 mL, p < 0.05) and blood transfusion requirements (5.1% vs 43.4%, p < 0.02) compared with patients in the control group. Moreover, the study group showed significantly higher time course of hematocrit at all time points during the operation and longer hospital stay (p < 0.02) than the control group; similarly, in the study group patients' platelet count in intensive care unit admission was significantly higher than the control group (140 +/- 29 x 10(9)/L vs 119 +/- 37 x 10(9)/L, p < 0.05). Peak postoperative troponin C release was significantly lower in the study group (4.74 +/- 2.82 vs 8.43 +/- 6.25 ng/dL, p < 0.033). One patient undergoing the MECC system operation showed a major neurologic event on postoperative day four, which was probably secondary to severe aortic calcification. CONCLUSIONS: The MECC system is suitable for aortic valve replacement and provides better clinical results than standard cardiopulmonary bypass as regards blood transfusion requirements, platelets consumption, and myocardial damage.

Vacuum-assisted venous drainage in extrathoracic cardiopulmonary bypass management during minimally invasive cardiac surgery.

The diffusion of minimally invasive cardiac surgery (MICS) during open-heart surgery has increased the use of assisted venous drainage support for cardiopulmonary bypass (CPB). Peripheral cannulation with small cannulae and vacuum-assisted venous drainage (VAVD) during MICS has been adopted in our institution since 1998. After the Heartport technique (HP) experience, the trans-thoracic clamp technique is now currently used. The aim of this study is to report our experience with extrathoracic CPB with VAVD application (on CPB) during open-heart MICS. From October 1999 to June 2006, 193 patients underwent MICS. Thirty-seven (19.2%) patients were treated with the HP--13 (35%) with robotic technology and 156 (80.8%) with trans-thoracic aortic clamping (TTAC). Mean age was 39 years (range: 12-77), and 114 patients (59.1%) were female. A total of 128 patients (66.3%) underwent mitral valve surgery, 57 (29.6%) atrial septal defect closure, five (2.6%) cardiac mass removal, and three (1.5%) tricuspid valve repair. Four patients (2.0%) had a previous cardiac procedure. Peripheral CPB was established with a standard coated circuit. A 14 Fr arterial cannula was inserted into the right jugular vein and positioned at the atrial/superior vena cava junction. A 21 or 28 percutaneous femoral cannula, depending on body surface area, was inserted in the femoral vein and an arterial cannula in the right femoral artery. Gravitational drainage was combined with VAVD. To improve the safety and effectiveness of this technique, we monitored the pressure on each venous cannula and in the reservoir. The mean CPB time was 74.8 +/- 30 min (TTAC) and 119 +/- 48 min (HP); mean aortic clamping time was 51 +/- 19 min (TTAC) and 73 +/- 29 min (HP). We did not record any neurological complication. Two patients (1.0%), one from each group, were converted to sternotomy. Three patients (1.5%) underwent re-exploration for bleeding. In-hospital mortality was 0.5% (N = 1) (HP). Mechanical ventilation time and intensive care unit stay were comparable to those recorded with conventional sternotomy. In conclusion, we found that extrathoracic CPB and VAVD during trans-thoracic clamping is a safe, simple, and effective technique for MICS. However, there is a potential risk of haemolysis and air embolism, which can be prevented with vacuum monitoring, and with the addition of gravitational drainage to reduce vacuum pressure.

Proton magnetic resonance spectroscopy reveals central neuroaxonal impairment in systemic sclerosis.

OBJECTIVE: . Involvement of the central nervous system (CNS) in systemic sclerosis (SSc) is rare. Proton magnetic resonance spectroscopy (1H-MRS) assesses in vivo cerebral metabolites. We investigated the biochemical modifications of the CNS in SSc. METHODS: N-acetylaspartate/creatine ratio (NAA/Cr) and choline/creatine ratio (Cho/Cr) at right centrum semiovale (RCS) and at right basal ganglia (RBG) were evaluated by 1H-MRS in 12 patients with limited (lSSc) and 8 patients with diffuse SSc (dSSc) and 20 control subjects. RESULTS: With 1H-MRS, a significant reduction of NAA/Cr ratio at RBG (p < 0.02) and at RCS (p < 0.002) was detected in SSc patients. Cho/Cr ratio was increased (p < 0.02) in the RCS, but not in RBG. In patients with lSSc, a significant reduction of NAA/Cr was detected in RCS but not in RBG. CONCLUSION: Evidence of neuroaxonal damage strongly suggests the existence of CNS involvement in SSc.

Cardiopulmonary bypass strategy during concomitant surgical treatment of mitral valve disease and atrial fibrillation.

In recent years, the popularity of simplified intraoperative ablation approaches to treat atrial fibrillation (AF) has been progressively increasing. Our group has described a left atrial procedure based on epicardial radio frequency ablation on cardiopulmonary bypass (CPB). We report our CPB and myocardial protection strategy in 157 patients who underwent AF ablation combined with open-heart surgery from February 1998 to February 2002. Since epicardial ablations are performed on CPB on the beating heart, the CPB strategy is crucial. Total normothermic CPB allows a safe dissection around the pulmonary veins on the decompressed heart; after the ablating catheter has been positioned, an adequate filling of the left atrium favours a uniform contact with the atrial wall. After crossclamping, low-flow retrograde cardioplegia delivery is administered while ablating endocardially to protect the main coronary arteries in the atrio-ventricular groove from radio frequency-related trauma. All patients were successfully weaned from CPB. Sinus rhythm was restored in 152 of 157 (96.8%) patients immediately after surgery. No procedure-related complications were recorded. Epicardial ablations allowed us to reduce significantly the aortic crossclamping time required for ablations. The conduct of CPB and myocardial protection play a central role in the surgical strategy by improving intraoperative feasibility and effectiveness of radio frequency ablation and preventing some of the potential postoperative complications related to the procedure.