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Biomedical subjects

K S Puder

Publications and source records attributed to K S Puder.

15 recordsLinked to original sources
PubMed1999

Colonoscopic release of the incarcerated gravid uterus.

BACKGROUND: Incarceration of the gravid uterus occurs in the early second trimester in approximately one in 3000 pregnancies. If conventional manual attempts at restoring the uterine fundus to the anterior position are unsuccessful, correction by an invasive laparotomy procedure is necessary. We describe a minimally invasive technique to dislodge the incarcerated gravid uterus. TECHNIQUE: Gravid patients with an incarcerated uterus refractory to manual reduction are administered sedation, and one to two enemas. After sedation, manual reduction is attempted again. If unsuccessful, a colonoscope is passed above the level of the uterine fundus generating external anterior forces, which dislodge the uterus from beneath the sacral promontory. EXPERIENCE: The procedure was performed six times in five patients. One patient required a second procedure because of recurrence of the condition. All procedures were successful. No pregnancy losses occurred after the procedure, and no complications of colonoscopy were encountered. CONCLUSION: Colonoscopic release of the incarcerated gravid uterus is an option when attempts at manual reduction fail. This procedure may avoid laparotomy to correct this condition.

Colonoscopy↗
PubMed1995

Predictive value of fetal serum beta 2-microglobulin for neonatal renal function.

When fetal urinary-tract malformations (UTM) are discovered, management is based on the prediction of postnatal renal function, currently made by fetal urinary biochemistry and sonography. Serum beta 2-microglobulin has been used postnatally to estimate renal function and does not cross the placenta. We investigated the relation between fetal serum beta 2-microglobulin and renal function by comparing 64 unaffected fetuses and 15 fetuses with UTM. A beta 2-microglobulin above a 5.6 mg/L cut-off gave cross-validated sensitivity of 80.0%, specificity of 98.6%, a positive predictive value of 88.9%, and a negative predictive value of 97.1% for our cohort study.

Cohort Studies↗
PubMed1995

The genetic implication for preceding generations of the prenatal diagnosis of interrupted aortic arch in association with unsuspected DiGeorge anomaly.

We present a case of prenatally diagnosed interrupted aortic arch with a ventricular septal defect in the presence of maternal congenital heart disease, which led to the detection of segmental monosomy of chromosome 22q11.2 in both patients. The implications of detecting a microdeletion and the importance of a multidisciplinary approach to prenatal diagnosis and counseling are discussed.

Adult↗
PubMed1995

Comparison of intrauterine hematologic and biochemical values between twin pairs with and without stuck twin syndrome.

OBJECTIVE: Our purpose was to compare hematologic and biochemical values in cordocentesis specimens from twin pairs with and without stuck twin syndrome. STUDY DESIGN: Cordocentesis was performed on 38 twin pairs. Assignment to the stuck twin syndrome group (n = 8) was based on ultrasonographic findings of discordant size and amniotic fluid volume, concordant gender, and a single placenta. A receiver-operator characteristic curve was constructed with the use of intertwin hemoglobin differences. For the stuck twin syndrome group regression analysis of gestational age and intertwin hemoglobin difference was done. RESULTS: We found significant (p = 0.03) intertwin differences in hemoglobin between the stuck twin syndrome group (mean 5.35 gm/dl, range 0.5 to 15.4 gm/dl) and the comparison group (mean 0.10 gm/dl, range 0.0 to 2.4 gm/dl). A nearly significant relationship between gestational age and intertwin hemoglobin difference was noted in the stuck twin syndrome group. When the hemoglobin difference was > 2.4 gm/dl, all cases had stuck twin syndrome (sensitivity = 50%, specificity = 100%, positive predictive value = 100%, negative predictive value = 91%). In the stuck twin syndrome group there was a trend toward larger intertwin differences in albumin and total protein. Intertwin blood gas values between the groups did not differ, but the average PO2 was lower when the smaller twins of the two groups were compared. CONCLUSION: An intertwin difference in hemoglobin > 2.4 gm/dl is consistent with stuck twin syndrome. Large intertwin hemoglobin differences and imbalances in albumin and total protein may be seen in stuck twin syndrome.

Blood Chemical Analysis↗
PubMed1995

Premature parturition is characterized by in utero activation of the fetal immune system.

OBJECTIVE: At birth the fetus emerges from a sterile environment into a nonsterile one. This process is associated with activation of the fetal immune system which protects the fetus against infection in the newborn period. We conducted this study to determine whether activation of the monocyte-neutrophil system occurs in fetuses before premature birth. STUDY DESIGN: Forty patients in premature labor with intact membranes underwent cordocentesis for research purposes. Fetal blood was analyzed with the use of flow cytometry to measure the cell surface markers CD11c, CD13, CD15, and CD67, which are associated with monocyte and neutrophil activation, and CD14 and CD63, which were used as controls. RESULTS: Twenty-eight percent (11/40) of the infants were delivered prematurely within 72 hours of entering the study while the remainder were delivered at term. Our data clearly indicate that premature infants delivered within 72 hours had a higher percentage of CD11c, CD13, CD15, and CD67 than those delivered at term. In contrast, there were no significant differences in the percentages of CD14 and CD63. CONCLUSION: Activation of the monocyte-neutrophil system exists in fetuses destined for premature delivery. These findings indicate that premature parturition is associated with in utero immune system activation.

Adolescent↗
PubMed1995

Prenatal ultrasonographic diagnosis of ductus arteriosus aneurysm with spontaneous neonatal closure.

Aneurysm of the ductus arteriosus may be either spontaneous or acquired as a complication of surgical closure of a patent duct. Patients may be asymptomatic or present with a wide spectrum of symptoms, including hoarseness, respiratory symptoms, aortic or pulmonary thrombosis or embolism, or rupture of the aneurysm. We present the first report of prenatal ultrasonographic diagnosis of isolated ductus arteriosus aneurysm. The aneurysm presented at 39 weeks as an enlarged, dilated, vascular structure 15 mm in diameter, which began at the bifurcation of the main pulmonary artery and ended in the descending aorta. Doppler imaging demonstrated turbulent flow in this lesion. Following spontaneous delivery, a bidirectional shunt in the ductus arteriosus was found on the 1st day, but the caliber of the vessel was normal. An almost completely functionally closed ductus was found on the 2nd day. Spontaneous resolution of the lesion was confirmed by magnetic resonance imaging at 4 weeks of age.

Adult↗
PubMed1994

Hydrolaparoscopy in the rabbit: a fine model for the development of operative fetoscopy.

OBJECTIVE: Our goal was to become adept at performing laparoscopic procedures within a fluid medium and at using miniature instruments in a small animal model. STUDY DESIGN: Adult female New Zealand rabbits underwent carbon dioxide laparoscopy while they were under general anesthesia with the use of 2 mm instruments. The abdominal cavity was filled with lactated Ringer's solution. Visualization of the intraabdominal organs and surgical procedures were performed below the fluid level. RESULTS: Excellent visualization of the abdominal organs below the fluid level was obtained. Several surgical tasks were accomplished, including cutting and coagulation of the uterine horns with monopolar electrocautery, creation of a defect in the mesovarium and mesometrium, extracorporeal knot tying, and intraabdominal cutting of suture material. Relatively high amounts of energy were needed during electrocautery within the liquid medium (> 25 W). Occasional fluid and gas leakage through the skin punctures was prevented with accessory clamps. CONCLUSION: Hydrolaparoscopy can be performed in the rabbit with miniature instruments. As it simulates the human intraamniotic environment, it is a useful model for the development of operative fetoscopy.

Abdomen↗
PubMed1994

Amnioinfusion: does the choice of solution adversely affect neonatal electrolyte balance?

OBJECTIVE: To determine whether various solutions commonly used in amnioinfusion during labor affect neonatal electrolyte and blood gas values. METHODS: Amnioinfusion for thick meconium or severe variable fetal heart rate decelerations is used at our institution according to a standardized protocol. During alternating 3-week periods, the only solution made available for amnioinfusion was either normal saline or Ringer's lactate. Bolus volume, rate, and duration of infusion were determined by the individual physicians. At delivery, cord blood was collected for electrolyte and blood gas determination. These values were compared between the two solution groups and to a non-infused control group. RESULTS: Complete data on neonatal electrolytes and blood gas values were available on 53 infusion patients (20 Ringer's lactate, 33 normal saline) and 39 non-infusion patients. Comparing infusion to non-infusion patients and those infused with Ringer's lactate to those with normal saline, we found no significant difference in demographics, neonatal outcome variables, duration of labor, neonatal electrolytes, and cord blood gas values. Infusion variables (bolus volume, infusion rate, hours infused, and total volume infused) did not differ between solutions. Total volume and hours of infusion were closely correlated with each other (r = 0.93, P < .001); both were correlated with neonatal chloride (r = 0.38 and r = 0.36, respectively; P < .005). No cases of hypernatremia or hyperchloremia were found in any of the groups. The type of solution used had no effect on the neonatal chloride trend. CONCLUSION: The use of both normal saline and Ringer's lactate for indicated amnioinfusion in labor appears to have no clinically significant effect on neonatal electrolytes.

Adult↗
PubMed1993

Embryoscopy and fetoscopy.

The introduction of transabdominal fiberoptic thin-gauge visualization of the embryo or fetus in the first trimester allows an earlier diagnosis of congenital anomalies currently beyond the resolution of ultrasound. In addition, it has the true potential of providing access to the fetal circulation at an early age, an accomplishment that would have enormous diagnostic and therapeutic implications. In the second and third trimester, operative fetoscopic techniques promise to open a new frontier in the diagnosis and management of fetal surgical and medical conditions.

Female↗
PubMed1988

Illicit methamphetamine: analysis, synthesis, and availability.

Methamphetamine has been marketed illicitly since the 1960s. Much of the street material was illicitly synthesized. Although methamphetamine quality was variable in the past decade, it has emerged since 1978 as the only street stimulant which is likely to contain what it purports to contain. Although there is a small volume of legitimate methamphetamine still made by the pharmaceutical industry, most material analyzed by street-drug laboratories appears to have been illegitimately synthesized and not diverted. For a decade, relatively little methamphetamine was submitted to street-drug analytical labs. In recent years, although the absolute volume of methamphetamine submissions changed little, this drug made up the bulk of alleged stimulant samples submitted to such facilities because of the paucity of amphetamine submissions. Methamphetamine synthesis and use appears to constitute a small but continuing portion of the illicit drug market.

Humans↗
PubMed1987

Persuading by citation: an analysis of the references of fifty-three published reports of phenylpropanolamine's clinical toxicity.

References cited in scientific articles may be used as data to characterize a body of reports. We examined the references and citations in 53 articles reporting adverse reactions to phenylpropanolamine. We classified the type of reference (case report, human or nonhuman experimental, editorial, or review) and read frequently cited articles to compare their content to their citational use. We searched the references for articles that we thought pertinent including the prospective clinical trial literature and studies comparing phenylpropanolamine with amphetamine. We learned that writers of these reports relied on other case reports and generally ignored experimental literature. These authors also often cited articles so that the original intent was not reflected. Publications presenting an alternative view were largely ignored. This analysis produces some evidence of bias against phenylpropanolamine and that the phenylpropanolamine adverse reaction literature may reflect chiefly social and clinical opinion.

Humans↗
PubMedDate not supplied

Is inflammation on Papanicolaou smear a risk factor for preterm delivery?

OBJECTIVE: Inflammation on Papanicolaou (Pap) smear has been associated with a 30-50% incidence of bacterial vaginosis (BV), a recognized risk factor for preterm delivery. We determined whether inflammation on Pap smear is associated with preterm delivery. STUDY DESIGN: 5,348 cases were studied with complete prenatal data including the potential confounder of treatment with antibiotics. Cases were categorized by presence (n = 1,139) or absence (n = 4,209) of inflammation on Pap smear. RESULTS: In the inflammation group the proportion of African Americans was lower (66.9 vs. 74.5%; p < 0.001). There were no significant differences (t test) for maternal age, gravidity, history of preterm delivery, or gestational age at delivery between inflammation and noninflammation groups. Multiple stepwise regression analysis showed that maternal age, history of preterm delivery, and African American race were all significantly positively associated with preterm delivery. Treatment with metronidazole during the pregnancy was significantly negatively associated with preterm delivery. Inflammation on Pap smear, gonorrhea detected during the pregnancy and prenatal treatment with erythromycin were not associated. CONCLUSION: Unlike bacterial vaginosis, inflammation on routine Pap smear does not appear to be a risk for subsequent preterm birth. We are unable to use inflammation on Pap smear as a surrogate for more specific diagnosis of bacterial vaginosis.

Adult↗