Intravenous lidocaine and magnesium for management of intractable trigeminal neuralgia: a case series of nine patients

Most patients suffering from trigeminal neuralgia (TN) benefit from medical therapy, for example carbamazepin, gabapentin, and pregabalin, individually or in combination. Nonetheless, some patients experience severe and intractable pain despite such medication, or the medication eliminates their pain but they experience intolerable side effects sufficient to warrant discontinuation. Intravenous magnesium and lidocaine have been used for management of intractable neuropathic pain. We treated nine patients with TN by using an intravenous infusion of a combination of 1.2 g magnesium and 100 mg lidocaine for 1 hour, once a week for 3 weeks. All patients experienced sound pain relief after the combined intravenous infusion therapy. Two patients experienced short and mild dizziness after the therapy, but no severe side effects were reported.     

The administration of pitavastatin augments creatinine clearance associated with reduction in oxidative stress parameters: acute and early effects

Background

Chronic kidney disease (CKD) is a serious health problem worldwide. Therapies that can halt the progression of CKD are limited, and the identification of new strategies for CKD treatment is therefore important. Pitavastatin, one of the newest statins introduced to the market, has been shown to exhibit some beneficial effects on renal and endothelial function.

Method

We enrolled 12 healthy volunteers for our study. With or without pitavastatin administration, creatinine clearance (Ccr), urinary albumin excretion, lipid status, and oxidative stress markers were evaluated in acute and early phases after administration of the drug.

Results

A single pitavastatin administration increased Ccr and reduced oxidative stress parameters, such as 8-OHdG levels and isoprostane production, within 6 h, without altering lipid status in healthy participants. A two-week treatment with pitavastatin lowered total and LDL cholesterol and triglycerides but not HDL cholesterol at 7 and 14 days. This change in lipid profile is associated with enhanced Ccr and the suppression of oxidative stress parameters. Urinary albumin excretion was reduced after either acute or chronic administration of pitavastatin, although this effect was not yet significant.

Conclusion

We found that pitavastatin augmented Ccr and reduced oxidative stress parameters in healthy subjects. These data suggest that pitavastatin affects renal outcomes in both lipid status-dependent and -independent manners. These observations suggest that pitavastatin treatment could be beneficial for CKD patients.     

Patient-prosthesis mismatch in patients with aortic valve replacement

Objective

Patient-prosthesis mismatch (PPM) may affect clinical outcomes in patients with aortic valve replacement (AVR). We retrospectively examined the PPM in patients with isolated AVR in the Japan Adult Cardiovascular Surgery Database (JACVSD).

Methods

We examined all patients with isolated AVR between January 1, 2008 and December 31, 2009. The JACVSD data collection form has a total of 255 variables. We defined PPM as an effective orifice area index of ≤0.85 m²/cm².

Results

PPM was observed in 306 of 3,609 cases analyzed, PPM rate was 8.5 %. Body surface area was larger and body mass index was higher in the PPM group than the non-PPM group (P < 0.001). Patients with PPM were older (P = 0.001) and had a higher prevalence of diabetes (P = 0.004), dyslipidemia (P < 0.001), hypertension (P < 0.001), cerebrovascular disease (P = 0.031), old myocardial infarction (P = 0.006), previous percutaneous coronary artery intervention (P = 0.001), coronary artery disease (P = 0.018), and aortic valve stenosis (P < 0.001). Perioperative blood transfusion (P < 0.001) and dialysis (P = 0.005) were more frequent in the PPM group. Postoperative ventilation (P = 0.004) and intensive care unit stay (P = 0.004) were significantly longer in the PPM group.

Conclusions

Age, aortic valve stenosis, dyslipidemia, hypertension, old myocardial infarction, previous percutaneous coronary artery intervention, diabetes mellitus, cerebrovascular disease, and high body mass index were the risk factors for PPM. PPM was not an independent risk factor for short-term mortality.     

The influence of denture supporting tissue properties on pressure-pain threshold: –Measurement in dentate subjects–

PurposeThe present study was designed to clarify the relationship between the properties of the palatal mucosa and the pressure-pain threshold.MethodsThree parts of the palatal mucosa of 17 dentate subjects were measured: the median part of the palate, the lateral part of the first molar, and the midpoint between these two parts. The subjects were instructed to press a pushbutton when he or she felt pressure-pain. The probe pressure was gradually increased (1 N/s). The thickness (T) (mm) and elasticity (E) (MPa) were used as the parameters of the properties of the palatal mucosa, whereas pressure (P) (MPa), compressibility (C) (%), and subsidence (S) (mm) were used as the parameters of the pressure-pain threshold. The Shapiro–Wilk test was used to consider the data of distribution of normality for each measurement point, as obtained from the 17 subjects. A Kruskal–Wallis test and a Wilcoxon signed rank test were performed for multiple comparisons, the Bonferroni method was used to compensate for the P-value. Spearman's rank correlation coefficient was calculated.ResultsT correlated with the values of S at the median points (P = 0.001) and midpoints (P = 0.011).ConclusionThickness can be an index of the amount of relief where pain is caused easily. In addition, modulus of elasticity is important as an indicator of the bearing ability of denture support tissues, it is necessary to consider how to evaluate the modulus of elasticity and to evaluate the relationship between the parameters of the pain threshold.     

Clinoidal meningioma arising from falciforme process of optic canal: Case report and review

Abstract

A 56-year-old female with an initial symptom of unilateral progressive visual disturbance presented with a clinoidal meningioma arising from a falciforme process of the optic canal. Magnetic resonance images with gadolinium-diethylenetriaminepenta-acetic acid demonstrated marked enhancement of a small mass, approximately 1 cm in diameter, roofing the right optic nerve at the intracranial opening of the optic canal. The clinoidal meningioma is rarely reported and the precise originating location of the neoplasm has not been clarified. This is the first case of clinoidal meningioma, which is confirmed by the operative observation as the origin of the neoplasm is a falciforme process of the optic canal. Magnetic resonance images with enhancement are useful for the diagnosis of such a small neoplastic lesion adjacent to bone structure and total removal without a deterioration of visual function is achieved by careful microsurgical procedure. [Neurol Res 1996; 18: 237–240]