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Biomedical subjects

A Marte

Publications and source records attributed to A Marte.

18 recordsLinked to original sources
PubMed2006

[Painful defecation and chronic functional constipation in children: Diagnosis and treatment].

AIM: The aim of this study was to report our results on the treatment of chronic constipation associated with pain during defecation. METHODS: From January 1999 to January 2004, 60 patients (25 females, 35 males; age range, 6 months to 12 years) who met the ROMA II diagnostic criteria for chronic functional constipation associated with pain on defecation were enrolled in the study. All subjects underwent anorectal manometry to determine rectosphincter inhibitory reflex function. A retraining program for daily defecation, a diet high in fiber and lactulose, and local administration of prilocaine/lidocaine were instituted. At rectal anal endosonography, 7 drug-treatment-resistant patients presented with increased thickness of the internal anal sphincter and received botulin toxin A injection at the sphincter. Because symptoms persisted in 2 of these patients, they received a sphincterectomy. RESULTS: At the end of treatment, 40 (71.4%) of the 56 patients who completed the study had a daily bowel movement without pain; 9 experienced a relapse; in the 2 surgical patients the alveus returned to normal function at 2 and 6 weeks, respectively. CONCLUSIONS: Our treatment strategy breaks the vicious circle of spasm-pain-spasm with use of prolonged analgesic treatment and feces softener over the course of the day. In treatment-resistant patients with functioning rectosphincter reflexes and thickened internal anal sphincter, administration of botulin toxin A may be a valuable aid in place of standard sphincterectomy.

Anal Canal↗
PubMed2005

[Efficacy of toxin-A Botulinum for treating intractable bladder hyperactivity in children affected by neuropathic bladder secondary to myelomeningocele: an alternative to enterocystoplasty].

AIM: To verify the efficacy of botulinus toxin A (TB-A) in treating children with neuropathic bladder secondary to myelomeningocele (MMC) with detrusor hyperactivity/low compliance, resistance to pharmacological therapy, and candidates for enterocystoplasty. METHODS: From January 2002 to June 2003, a group of 7 patients was selected (4 females, 3 males, mean age, 9.8 years, age range, 5-17 years) with detrusor hyperactivity, clean intermittent catheterization and resistance to pharmacological therapy. Two patients presented with grade 2-3 monolateral vesicoureteral reflux (VUR). All patients were incontinent despite catheterization. Botulinus toxin A was administered under general or local anesthesia by the injection of 200 IU of toxin diluted in 10 cc of physiologic solution with a metal or a flexible needle (3.7 F/21 GA). The needle was fully inserted into the detrusor muscle in about 20 sites, and 0.5 cc of solution were injected in each site, except the trigonum vesicae. Follow-up included ultrasound examination of the urinary tract and urodynamic studies performed at 6, 12 and 24 weeks and biannually thereafter. Micturition cystography was performed 3 months after the intervention. Urodynamic parameters were leak point pressure (LPP), leak point volume (LPV) and specific volume at 20 cm H2O pressure. The results were analyzed using the Wilcoxon test. RESULTS: A significant increase in LPV (range, 30-108%, mean, 77.6%) and in specific volume at 20 cm H2O pressure (CS 20) was observed in all patients. No significant change in LPP was found. One patient previously treated with the Cohen reimplantation technique experienced transient VUR which resolved spontaneously within 1 month. No major side effects from the injection of TB-A occurred. All patients were hospitalized for 24 hours with catheterization. CONCLUSIONS: The preliminary results in this small sample of patients suggest that the use of TB-A is efficacious in significantly improving urodynamic parameters and urine storage volume at low pressures in patients with neuropathic bladder resistant to pharmacological therapy.

Adolescent↗
PubMed2002

Feshbach resonances in rubidium 87: precision measurement and analysis.

More than 40 Feshbach resonances in rubidium 87 are observed in the magnetic-field range between 0.5 and 1260 G for various spin mixtures in the lower hyperfine ground state. The Feshbach resonances are observed by monitoring the atom loss, and their positions are determined with an accuracy of 30 mG. In a detailed analysis, the resonances are identified and an improved set of model parameters for the rubidium interatomic potential is deduced. The elastic width of the broadest resonance at 1007 G is predicted to be significantly larger than the magnetic-field resolution of the apparatus. This demonstrates the potential for applications based on tuning the scattering length.

Journal Article↗
PubMed2002

A long-term follow-up of autoaugmentation in myelodysplastic children.

OBJECTIVE: To evaluate the long-term results of patients who underwent bladder autoaugmentation (BA) in whom BA was used to treat a neuropathic bladder secondary to myelomeningocele, and who presented with a high-pressure/poorly compliant bladder. PATIENTS AND METHODS: Eleven patients (eight girls and three boys, mean age 12.8 years, mean follow-up 6.6 years) were selected who had undergone BA between June 1991 and June 1994. At surgery, the patients had a poorly compliant bladder with a mean leak point volume (LPV) of 94 mL and a mean leak point pressure (LPP) of 58 cmH2O. None of the patients had vesico-ureteric reflux (VUR) at BA; five with grade III or IV VUR had undergone endoscopic correction in a day-surgery procedure using a suburethral collagen injection 1-3 weeks before BA. The patients were evaluated using clinical, urodynamic, radiological and endoscopic assessments. The LPV, LPP and safe bladder capacity (SBC, the cystometric volume at an intravesical pressure of 40 cmH2O) were recorded. RESULTS: At 1 year after surgery the mean LPV was 297 mL; none of the patients had VUR. The most recent mean LPV was 198 mL and the SBC 167 mL. The mean LPP remained stable at 60 cmH2O. At the last follow-up four patients had recurrent uni- or bilateral grade III-V VUR. At endoscopy the 'augmented' bladder portion had a smooth surface, compared with the grossly trabeculated lower half. From this finding all patients on clean intermittent catheterization were treated with oral oxybutynin. Some patients reported slightly less abdominal pain at maximum bladder volume; four needed pads to treat intermittent incontinence. On voiding cysto-urethrography, one patient had an hourglass-shaped bladder. Five patients recently underwent ileocystoplasty because of recurrent urinary tract infection, high-grade VUR and incontinence. CONCLUSION: These results do not justify the routine use of BA in hypertonic/poorly compliant bladders secondary to myelomeningocele. The mean follow-up of 6.6 years showed that this procedure failed in seven of 11 patients. Further studies might be able to identify subgroups in which this approach may be more appropriate.

Child↗
PubMed2001

Avalanches in a Bose-Einstein condensate.

Collisional avalanches are identified to be responsible for an 8-fold increase of the initial loss rate of a large (87)Rb condensate. We show that the collisional opacity of an ultracold gas exhibits a critical value. When exceeded, losses due to inelastic collisions are substantially enhanced. Under these circumstances, reaching the hydrodynamic regime in conventional Bose-Einstein condensation experiments is highly questionable.

Journal Article↗
PubMed2001

Functional evaluation of tubularized-incised plate repair of midshaft-proximal hypospadias using uroflowmetry.

OBJECTIVE: To determine objectively, using uroflowmetry, the functional results of the tubularized-incised plate urethroplasty to repair midshaft-proximal hypospadias. PATIENTS AND METHODS: Twenty-one patients (mean age 4 years, mean follow-up 1.8 years) were selected from those undergoing surgery between January 1996 and January 1998 at our institution. All patients had midshaft-proximal hypospadias and were treated using the Snodgrass technique. Patients were included if they were able to void volitionally and had no fistula. The flow pattern, maximum (Qmax) and mean flow rate (Qave) were measured; the results were expressed as percentiles and compared with published values from normal children. The Qmax and Qave were considered normal if > 25th percentile, as equivocally obstructed when in the 5-25th percentile and obstructed if < 5th percentile. RESULTS: Fourteen patients were considered normal, four as equivocally obstructed and three as obstructed. Of the second group, one patient had a urethral diverticulum at the native meatus (confirmed by voiding cysto-urethrography) and the remaining three patients had meatal stenosis that responded to dilatation, with normal flow in two and improvement in the other. Of the obstructed group, one patient responded to dilatation and two underwent meatoplasty. CONCLUSION: The tubularized-incised plate repair provides satisfactory functional results for midshaft-proximal hypospadias; uroflowmetry is an important noninvasive tool to evaluate this technique. A long-term follow-up is needed to confirm these results.

Child, Preschool↗
PubMed2001

MAGPI procedure in meatal regression after hypospadias repair.

OBJECTIVE: To evaluate the efficacy of MAGPI's procedure in children who had a meatal regression after hypospadias repair. PATIENTS AND METHODS: Twenty-one children affected by post-hypospadias repair meatal regression underwent a modified MAGPI repair between January 1992 and January 1999: the patients, aged between 3 and 12 years (mean 5.9), had previously undergone hypospadias repair according to the techniques of Duplay (11 patients), Mathieu (2 patients), Snodgrass (5 patients) or the onlay buccal mucosa graft (3 patients). The outcome of the procedure was evaluated in terms of urinary stream and cosmetic appearance. RESULTS: The results were good in 18 patients, fair in 2, unchanged in 1. CONCLUSIONS: MAGPI's repair has proven to be very effective as a secondary procedure in meatal regression after hypospadias correction, with minimal morbidity and a highly successful outcome in terms of satisfactory functionality and cosmetic appearance, and the recovery of gaps as large as 9 mm.

Child↗
PubMed2001

Hyperuricosuria in children: clinical presentation and natural history.

OBJECTIVE: Idiopathic hyperuricosuria (HU) was previously reported in only a limited number of children with hematuria. We aimed to outline the clinical presentation and natural history of HU not only in children with hematuria, but also in those with dysuria and/or recurrent abdominal/flank pain and a family history of urolithiasis. STUDY DESIGN: Retrospective analysis of data at diagnosis from 102 consecutive children with HU and outcome analysis of 26 of them who were followed >/=1 years (mean: 3.1) with no specific therapy. RESULTS: Sixty-one participants had HU and 41 had HU + hypercalciuria. Fifty-two patients had no hematuria among the presenting symptoms, more than one third had normal urinalysis at our first examination, one half had microcalculi (<3 mm in diameter) at renal sonography, and 12% had stones (4-18 mm). Thirty participants of the 39 with no hematuria at our first examination (77%) showed microcalculi or calculi at renal sonography. The patients with microcalculi were significantly older than were those without microcalculi. During the follow-up, 4 of 26 children never had hematuria and 8 had no hematuria during most of the follow-up period. Two patients who had a calculus at first visit and 3 who formed calculi 4 to 12 mm in diameter, after 1 to 3.5 years subsequently passed them in the urine. CONCLUSIONS: The lack of hematuria is not predictive of absence of urolithiasis. Therefore, it may be misleading to judge on the efficacy of a given therapy only based on disappearance of hematuria. HU and hypercalciuria have to be suspected in children with dysuria and those with recurrent abdominal/flank pain and familial history of urolithiasis, although they have no hematuria.

Abdominal Pain↗
PubMed2001

Electromyographic and manometric anorectal evaluation in children affected by neuropathic bladder secondary to myelomeningocele.

BACKGROUND: Fecal incontinence, with or without persistent constipation is often underestimated in children affected by spina bifida. Medullar lesions to the L-S metameres result in a slowing of rectal and/or rectal-sigmoid motility, loss of anal or rectal sensation, deranged external anal sphincter function, altered motility of the anal levator muscles, and loss of motor coordination of the internal sphincter. We conducted an electromyographic and electromanometric evaluation of the anorectal tract in a group of children affected by myelomeningocele (MMC) in an attempt to evaluate the degree of functional damage and to provide appropriate treatment. METHODS: Anorectal manometry was conducted in 83 children affected by MMC (2-16 yrs, mean age: 8.4 yrs); surface electromyography was also performed in 37 of these children. We thus evaluated overall sphincter pressure, the inhibitory anal reflex, the rectal sphincteric reflex and rectal motility during stimulation and at rest. Recording perfusion catheters (0.1 ml/sec) were placed at rectal and anal level; rectal stimulation was conducted with an endorectal balloon. RESULTS: In all patients there was a reduction in overall sphincter pressure (15-25 mmHg; n.v. 45+/-25 mmHg) and the functional length of the anal canal (1-1.8 cm) compared with age matched controls. The inhibitory anal reflex was normal in all patients, although its amplitude, duration and sensitivity were not constant. Similar findings were obtained for the rectal-sphincteric reflex. The rectal sigmoid motility results were difficult to interpret: sudden, fast and high pressure waves of peristaltic progression were followed by prolonged pauses. No correlation was found between urodynamic and anorectal manometric data. Treatment consisted in daily emptying of the rectum so as to avoid fecal retention. Fifteen patients, who presented prolapse and sphincteric hypotonia ( </=10 mmHg), underwent cerclage by 2/0 prolene, with sustained good RESULTS. CONCLUSIONS: While evaluation parameters of the neuropathic bladder are well standardised, data on the neuropathic rectum are contradictory. Moreover, the results of functional examination are not always an aid to treatment strategy. Therefore, further studies are required to establish an appropriate diagnostic-therapeutic protocol.

Adolescent↗
PubMed2000

[Mouth mucosa free-flap grafts in repeat operations of hypospadias].

BACKGROUND AND AIMS: Buccal mucosal grafts are widely used in the treatment of primary hypospadias and urethral stenosis owing to their elasticity, optimal attachment, possibility of generous harvesting and easy preparation. The aim of this study was to check whether buccal mucosal flaps are also valuable in redo surgery for hypospadias complicated by large breaks in the urethra and with scarce residual genital tissue. METHODS: Fourteen patients aged between 3 and 11 years old (mean age 6.6) were selected and operated between December 1993 and June 1999. The patients presented extensive fistulous tracts, roughly ellipsoidal in shape and with a maximum diameter of between 7 and 42 mm (mean length 18 mm). The original technique was: Duplay (7 patients); Onlay buccal graft (1 patient); Snodgrass (1 patient); Tubulised preputial flap (2 patients); Onlay preputial graft (2 patients); Tubulised vesical mucosal flap (1 patient). The mucosal flap, taken from the lower lip, was used to cover the gap as an onlay patch and recovered with residual genital skin with the interposition, where possible, of a de-epithelised flap. RESULTS: An optimal cosmetic and functional result was achieved in 10/14 cases with flowmetry > 25 percentile according to Toguri nomograms. Three patients presented fistulas: one punctiform fistula resolved spontaneously. The other two cases resolved after corrective surgery. One patient showed meatal regression with slight stenosis that was resolved with MAGPI. CONCLUSIONS: These results appear to be encouraging. Buccal mucosal graft may represent a valid alternative also in the treatment of secondary hypospadia with large breaks in the urethra. No complication was reported in the harvesting area, even if this was carried out at a second stage in the labial area.

Child↗
PubMed1999

Body growth in early diagnosed vesicoureteric reflux.

Body growth was studied in 32 subjects with vesicoureteric reflux (VUR), diagnosed following the prenatal finding of urinary tract dilatation, who had normal renal filtration function and who received antibacterial prophylaxis by the first few days of life. They were followed for 1-5 years (mean 2.3 years). Most had persistent VUR during the 1st year of life. Body growth performance was compared with that of 94 subjects with VUR diagnosed and treated by us after the neonatal period. During the follow-up period, none of the patients with prenatally detected VUR had a height Z score below -2, nor a weight-for-height index below 90%, and 1 had variations in height Z score >/=1. The difference in the percentage of patients with prenatally detected VUR (1/32) and those with VUR diagnosed and treated after the neonatal period (20/94) who had variations in height Z score >/=1 was significant (P=0.035). Patients with prenatally detected VUR and normal renal filtration function, given antibacterial prophylaxis by the first few days of life, have normal body growth, although VUR still persists.

Anti-Bacterial Agents↗
PubMed1998

Chronic interstitial cystitis and systemic lupus erythematosus in an 8-year-old girl.

An 8-year-old girl with systemic lupus erythematosus (SLE) and diffuse proliferative glomerulonephritis had chronic interstitial cystitis (CIC) early in the course of SLE. The early occurrence of CIC, the lack of intestinal symptoms, the association with vesicoureteric reflux, and the improvement of CIC during therapy with cyclosporin A were the prominent features of the patient reported here.

Brain↗
PubMed1998

[Value of uroflowmetry in a long-term follow-up study in hypospadias surgery].

BACKGROUND: Many authors have shown the role of uroflowmetry in the follow-up of patients operated on for hypospadias. This technique has also been used to assess the validity of the operative technique. METHODS: Sixty patients have been selected among those operated on for hypospadias from January 1990 till January 1996 at the Pediatric Surgery Department of the Second University of Naples, Italy. These patients underwent uroflowmetry with a rotating disk sensor at clinic. Postoperative time at uroflowmetry ranged between 6 months and 6 years. Flow pattern, maximum flow rate (Q max) and mean flow rate (Q ave) were measured. Results are expressed as percentiles and compared with those obtained from Toguri. Q max and Q ave greater than 25 degrees percentile were considered normal; Q max and Q ave between 25 degrees and 5 degrees percentile were considered query obstructed; Q max and Q ave below the 5 degrees percentile were considered obstructed. RESULTS: Forty-two patients (70%) presented values above the 25 degrees centile, 8 patients (13.4%) presented an obstructed-like flow and 10 children (16.6%) showed a query obstructed flow. Three patients from the latter group presented within three months an obstructed-like flow. CONCLUSIONS: Uroflowmetry is an important tool in the follow-up of patients operated on for hypospadias that are at risk for stenosis and then requiring a further treatment, either dilatation or surgery.

Child↗
PubMed1997

Catch-up growth in children with vesico-ureteric reflux.

A longitudinal retrospective study of height Z score (HZ score) and weight-for-height index (WHI) was performed on 94 pre-pubertal children with vesico-ureteric reflux (VUR) and normal creatinine clearance followed for 1-6.8 years (mean 3.1 years). Thirty patients had bilateral VUR with scintigraphic signs of renal scarring (B+), 17 had bilateral VUR without renal scarring (B-), 27 had unilateral VUR with (U+) and 20 unilateral VUR without (U-) renal scarring. Thirty-three patients received only antimicrobial medication and 61 underwent successful antireflux operation. The increase in HZ score and WHI during the 1st year of follow-up was significantly (P = 0.001 and 0.00003, respectively) higher than during the 2nd year. At first visit, B+ subjects had an average WHI and HZ score that were significantly (P = 0.02 and 0.04, respectively) lower than the other groups of patients together. At last visit this difference was not significant. In B+ subjects, the WHI and HZ score at last visit were significantly (P = 0.04 for both) higher than at the first visit. B+ patients fully recover their body growth deficit compared with other groups of VUR subjects after medical and/or surgical therapy.

Body Weight↗
PubMed1986

Hirschsprung's disease and asymptomatic malrotation: a rare association.

Intestinal malrotation and Hirschsprung's disease may be associated with other congenital anomalies. However, the association of Hirschsprung's disease with intestinal malrotation has been recently pointed out and sporadic cases are reported in the literature. We describe a case of such an association in a baby with asymptomatic malrotation and emphasize the diagnostic implications.

Cecum↗
PubMed1980

[Total body washout (T.B.W.) in the rat. 1) Perfusion techniques].

Three different techniques of total body washout (T.B.W.) have been used in experiments dealing with rats. The first technique was employing inferior vena cava as input and abdominal aorta as output; the second one performed just the opposite way; finally the third used abdominal aorta at the start of the experiment, whereas inferior vena cava was selected at the end. The last one proved to be the most efficient technique in comparison to the other ones.

Animals↗
PubMedDate not supplied

[Hemangioma of the bladder in children: 2 case reports and review of the literature].

Hemangioma of the bladder is a rare benign tumor. Hematuria is the most common symptom of the disease. The Authors report their experience on two isolated cases of bladder hemangioma. The lesions were diagnosed by endoscopy and biopsy. In both cases the hemangiomas were electrocoagulated endoscopically. Follow-up examination after 1 year, has shown complete eradication of the lesion.

Age Factors↗