Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Suction”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 919 records · Page 51Linked to original sources
PubMed2000

In vivo model of the mechanical properties of the human skin under suction.

BACKGROUND/AIMS: A new method for the in vivo characterization of the mechanical properties of skin has been developed. This comprises a suction chamber and an ultrasound device to measure both the vertical displacement of the skin's surface, and the skin's thickness. METHODS: A mathematical model of the mechanical behaviour of a taught elastic membrane is used to obtain a set of parameters intrinsic to the skin, such as Young's modulus (E) and the initial stress (sigma0), which reflect the stiffness and the natural tension of the skin, respectively. We also calculated an index of non-elasticity of the skin (unrestored energy ratio, UER), which takes into account the volume of tissue mobilized. It determines a ratio between the energy input to the skin and the energy it dissipates. These parameters were evaluated from the volar forearm of 10 normal male volunteers. RESULTS: The results were: 129+/-88 kPa for E, 13.5+/-5 kPa for sigma0, and 0.42+/-0.04 for UER; with reproducibilities of 9.5%, 12.4% and 6.4%, respectively. CONCLUSIONS: This new suction device was found useful for the study of the behaviour of the skin, and the device may be used for the evaluation of certain skin diseases and their therapy.

Journal Article↗
PubMed2000

Continuously maintaining positive flow avoids endocardial suction of a rotary blood pump with left ventricular bypass.

This study showed the usefulness of maintaining positive pump flow to avoid endocardial suction and as an assist bypass. Three calves were implanted with centrifugal pumps. Hemodynamics and pump parameters were measured at varying pump speeds (from 1,100 to 2,300 rpm). In each test pump, speed was adjusted to create 3 hemodynamic states: both positive and negative flow (PNF), positive and zero flow (PZF), and continuously positive flow (CPF). The pump flow volume was determined during systole (Vs) and diastole (Vd). Vs in PNF was 29.6 ml and was not significantly different from Vs in PZF (p > 0.15). Vd in PNF was significantly different from Vd in PZF (p < 0.05). All bypass rates of PNF were over 30% of pulmonary flow. All PZF bypass rates were between the PNF rate and the CPF rate. These data showed that PZF satisfied the minimum requirement of assist flow and was under 100% bypass. Thus, PZF may avoid endocardial suction.

Analysis of Variance↗
PubMed2002

Intraoral transmental suction lipectomy.

Intraoral transmental suction lipectomy (TMSL) is performed by entering the suction canula through the chin osteotomy/ostectomy gap into the sub- and/or supraplatysmal fat tissue layers. The aim of the study was to know patients' and operators' satisfaction with the procedure, and to know the kind and frequency of the complications. Twenty patients were consecutively treated and reviewed after a minimum of 5 years. All were satisfied with the overall results. It proved difficult to differentiate between the results of the liposuction and those of the genioplasty and/or orthognathic profile correction. From a surgeon's point of view, 11 showed excellent, nine good and one moderate results. Complications included one local subcutaneous infection, four transient neurosensory disturbances at the lower lip and two marginal branch weaknesses. All complications were resolved by the time of the long-term follow-up appointment. TMSL offers the psychological advantage of being performed without skin incision. Cosmetic results and complications are similar to those obtained with the transcutaneous liposuction techniques.

Adolescent↗
PubMed2002

Unrecognized cervical pregnancy treated by suction curettage and cervicovaginal tamponade.

The authors presented a case of a 30-year tertigravidar women with unrecognized cervical pregnancy, treated by suction curettage and cervicovaginal tamponade. In our case of unrecognized cervical pregnancy, during hysterometry and cervical dilatation occured uterine bleeding and clinical pictures of obstetrics hemorrhagic shock, so we continued with suction curettage and cervicovaginal tamponade as a urgent procedure which turned out as a final. Medicamentous chemotherapy of the cervical pregnancy (methotrexat) was not used, because after described procedure beta-HCG lytic decreased and without colour-Doppler visualization of local cervical trophoblastic vascularisation.

Adult↗
PubMed1992

Manometric evaluation of children with chronic constipation using a suction-stimulating electrode.

Thirteen children with chronic constipation (8 males and 5 females, aged 1 month to 9 years) were evaluated manometrically. A suction-stimulating electrode was used to induce the rectoanal reflex electrically so as to examine the threshold voltage and latency of this reflex. The rectoanal reflex was induced in all patients by balloon dilatation of the rectum. However, electrical stimulation of the rectal mucosa triggered a reflex in only nine of them and the threshold voltage and latency was 22.2 +/- 3.6 volts (mean +/- SD, n = 9) and 2.04 +/- 0.38 seconds (n = 9), respectively. Hence, it is suggested that a suction-stimulating electrode is a useful supportive tool in manometric anorectal studies, and that disturbances in the rectal nervous system might be one of the causative factors in chronic constipation in childhood.

Anal Canal↗
PubMed2000

Suction pressure can induce uncoupling of the plasma membrane from cortical actin.

We tested the hypothesis that a pressure difference can cause blebbing associated with uncoupling of the plasma membrane from the cortical actin, a phenomenon found earlier in locomoting blebbing Walker carcinosarcoma cells. Untreated, initially spherical Walker carcinosarcoma cells were exposed to suction pressure by partial aspiration into micropipettes. The suction pressure required to induce blebbing was in the range of 0.9-3 cm H2O, i.e., somewhat lower than the increase in intracellular pressure measured before formation of protrusions in Amoeba proteus (Yanai et al., Cell Motil. Cytoskeleton 33, 22-29, 1996). The response was temperature-dependent, blebbing occurring more frequently at 37 degrees C than at room temperature. Blebbing was associated with formation of cytoplasmic actin layers, restriction rings and/or of gaps in the plasma membrane-associated cortical actin. The results support the view that blebbing associated with uncoupling of cortical actin and plasma membrane as observed in locomoting cells can be caused by a pressure gradient.

Actins↗
PubMed1981

A method to measure the water-holding properties of dietary fibre using suction pressure.

1. Water-holding capacity (WHC) of dietary fibre is usually considered as the amount of water held but the manner in which water is held by the fibre matrix may be more relevant in understanding the role of fibre in nutrition. 2. A method used to determine WHC under physiological conditions has been adapted to determine how strongly water is held by fibre. Solutions of compounds, such as polyethylene glycol, of known osmotic potential are used to generate a suction pressure across a dialysis membrane containing a fibre sample. The WHC at each suction pressure can then be determined. 3. The method can be applied to water-soluble and water-insoluble sources of fibre. Fibre sources studied included potato fibre concentrate, bran and gum arabic. 4. Results are comparable to other similar systems of WHC measurement for gels and suggest that vegetable fibre has water-holding properties more akin to a true gel than bran. Bran has very poor water-holding properties. 5. Differences in WHC between fibre sources are more apparent if WHC is considered as fibre concentration (g fibre/g water). 6. Differences in the water-holding properties could be important in determining fibre activity in the gut.

Dietary Fiber↗
PubMed2002

Comparison of fiber diameter distributions deduced by modeling compound action potentials recorded by extracellular and suction techniques.

In this study, the extracellular and suction techniques, used widely to record compound action potentials (CAP), were compared in respect to their ability to deduce fiber diameter distribution (FDD). Fiber diameter distribution derived by applying the deconvolution model to CAP depends not only on the modeling but also on the recording techniques. The FDDs determined by these two techniques were compared with that predicted by histological means. In our model study, a waveform for single fiber action potential (SFAP) was defined as [symbol: see text] where the parameters tau 1 and tau 2 were taken from the literature and given for the SFAP of each fiber diameter between d = 3-22 microns, and A was chosen to normalize the amplitude of SFAP to 1. We substituted the measured CAPs into our model and calculated the histograms related with the fiber diameter distribution of the sciatic nerve trunk. We saw that the FDD as predicted from the CAP, recorded by the extracellular techniques, coincides better with that of the histologically determined FDD than that predicted by suction techniques.

Action Potentials↗
PubMed1988

The use of wall suction as a lipoaspirator.

Hospital wall suction, standard tubing, and liposuction cannulas have been used successfully for liposuction. Benefits include convenience, simplicity, cost effectiveness, and reduction of effluent dispersion. Our experiences indicates that hospital wall suction can be used as an efficacious lipoaspirator.

Humans↗
PubMed1997

Intestinal perforation after suction lipoplasty: a case report and review of the literature.

Intrabdominal penetration with intestinal perforation is a relatively uncommon complication after liposuction. Seven cases have been reported in the literature, with a mortality rate > 50%. Here we present a case of a perforated viscus after suction lipoplasty of the abdomen using the tumescent technique. Multiple small-bowel enterotomies were made with the suction cannula. It is our hope that a heightened awareness of this potentially life-threatening complication will promote early and aggressive diagnosis and treatment of liposuction patients who present with gastrointestinal complaints in the early postoperative period.

Abdominal Abscess↗
PubMed1981

Rectal suction biopsy for the diagnosis of Hirschsprung's disease.

The diagnosis of Hirschsprung's disease is at times difficult, particularly in the young patient. Since 1972 we have used rectal suction biopsy as a screening technique in neonates and infants with failure to pass meconium or evidence of obstruction. In addition, it is used to confirm the diagnosis of Hirschsprung's disease when suspected by barium enema study. This technique has been used in 444 patients, 302 of whom were less than one year of age. No anesthesia is necessary, and there have been no associated complications. Only one patient early in the study had an initial misdiagnosis. There have been no false-positive or false-negative specimens since this initial problem, and no patients have undergone inappropriate pull-through procedures for suspected Hirschsprung's disease. It is recommended that all neonates who do not pass meconium in the first 48 hours of life undergo rectal suction biopsy to establish the diagnosis of congenital megacolon.

Biopsy, Needle↗
PubMed1975

Treatment of coccidioidomycosis infection of bone with local amphotericin B suction-irrigation. Report of a case.

A 29-year-old man with coccidioidomycosis of the tarsal bones and toxic reactions to intravenous Amphotericin B was treated by surgical curettage and local suction-irrigation system of Amphotericin B. The patient responded to treatment and was free of disease 2 years later. Local suction-irrigation with Amphotericin B may be a valuable adjunct in the treatment of coccidioidomycosis infection of bone.

Adult↗
PubMed1991

Skin retraction following suction lipectomy by treatment site: a study of 500 procedures in 458 selected subjects.

I identified 500 suction lipectomy procedures involving sites on the body and in the cervicofacial region in 458 selected patients and studied the influence of treatment site on postoperative skin retraction by comparing preoperative and postoperative skin condition. Postoperative skin condition was evaluated first in the immediate postoperative period (second or third day); then at a more remote date (after at least 2 months of follow-up). On the body, restoration of the preoperative condition of the skin was obtained in 94.6 percent of treatment sites in the immediate postoperative period; after a longer follow-up, this proportion was 87.9 percent because of delayed development of modifications. The time interval needed to obtain a stable result increased with increasing age, regardless of the nature of this result, as well as with the total amount of fat removed. On the neck, liposuction improved or even eliminated preexisting skin looseness, and this improvement was even more noticeable as follow-up increased. The neck thus appears as the site of choice for suction lipectomy. On the face, in contrast, favorable results deteriorated over time, a finding that leads me to advocate combination with a face-lift whenever ptosis is present. Thus treatment site obviously has a substantial impact on the potential of the skin for retracting postoperatively.

Abdomen↗
PubMed1991

The effect of epinephrine on blood loss during suction lipectomy.

In a prospective, double-blind, controlled study on 26 consecutive patients who underwent suction lipectomy, the injection of epinephrine (1:250,000, 1:500,000, or 1:1,000,000) was not found to decrease fluid/blood loss when compared with saline injection or no injection at all. Since our study fails to support the use of epinephrine to lessen fluid/blood loss during suction lipectomy, we have abandoned its use in that procedure.

Adult↗
PubMed1993

Long-term results of blunt suction lipectomy assessed by a patient questionnaire survey.

A questionnaire was sent to 1339 consecutive patients who had undergone blunt suction lipectomy during the period between April 1984 and April 1987. Seventy-four percent replied, thus providing information about the results of 1929 procedures. The overall reported rate of satisfaction was 76 percent, with no significant difference between males and females. Highest satisfaction referred to pseudogynecomastia, submental area, iliac crest, and lower extremities on females. The rate of dissatisfaction was 6 percent. Dissatisfaction was associated most frequently with lipectomy of the buttocks. Underresection was reported for 30 percent and over-resection for 2.2 percent of the procedures. The latter, in particular, seemed to lead to dissatisfied patients. Asymmetry was reported for 19 percent of the procedures. Recurrence ("return") of fatty tissue was reported for 29 percent at the resection site. Thirty percent of the patients reported compensatory increase ("came back elsewhere") in fat deposits in nontreated locations. Self-reported weight gain was found to be a significant risk factor for both types of "regrowth." Irregularities were the most frequently reported permanent changes to skin. There were twice as many negative as positive changes to skin. Most of the patients had benefited personally from the surgery and were willing to consider undergoing lipoplasty again. All in all, the long-term results of blunt suction lipectomy are satisfactory.

Adult↗
PubMed1994

Plasma lidocaine levels during suction-assisted lipectomy using large doses of dilute lidocaine with epinephrine.

Liposuction, like many other plastic surgical procedures, is often performed under local anesthesia. Drug toxicity is the most serious complication and the factor that limits the use of this form of anesthesia. Toxic effects are related to the peak concentration in plasma and depend on the type of local anesthetic, the drug concentration, total dose, site of injection, injection speed, and whether vasoconstrictors are used or not. This study evaluates the use of large volumes of subcutaneously injected 0.1% lidocaine with epinephrine 1:1,000,000 as the local anesthetic procedure in 12 patients undergoing suction-assisted lipectomy of the abdomen, flanks, and/or lower extremities. A total dose of 1260 to 2880 mg lidocaine corresponding to 10.5 to 34.4 mg/kg was administered with an injection speed of 60 to 78 ml/min. The peak concentration of lidocaine varied between 0.9 and 3.6 micrograms/ml and occurred between 6 and 12 hours postoperatively. For the given dose range, a linear correlation (r = 0.83) was found between the total dose of lidocaine and the peak concentration in plasma. A dose increase of 1 mg/kg raised the peak concentration approximately 0.1 microgram/ml. Our data clearly demonstrate that when using pH-adjusted 0.1% lidocaine with epinephrine subcutaneously for suction-assisted lipectomy, lidocaine can be administrated safely in significantly higher doses than recommended. When such high doses are used, the patient probably should be observed for at least 18 hours postoperatively.

Adult↗
PubMed1999

The influence of permanent magnetic field therapy on wound healing in suction lipectomy patients: a double-blind study.

The authors present their experience with the healing influence of permanent magnets on postoperative wounds. The responses of 20 patients who underwent suction lipectomy and postoperative negative magnetic field therapy were studied in a double-blind fashion. Magnets in the form of patches (10 patients) or sham magnet patches (10 patients) were placed over the operative region in each of the patients. Pain, edema, and discoloration (ecchymosis) were evaluated at 1, 2, 3, 4, 7, and 14 days postoperatively. Our results show that the treatment group had significant reductions in pain on postoperative days 1 through 7, in edema on days 1 through 4, and in discoloration on days 1 through 3 when compared with the control group. These results demonstrated that commercially available magnets have a positive influence on the postoperative healing process in suction lipectomy patients.

Adolescent↗
PubMed2000

Toxic shock syndrome after suction lipectomy.

We present a case of toxic shock syndrome with necrotizing fasciitis after suction lipectomy. The patient underwent aesthetic suction lipectomy of the abdomen, buttocks, and thighs during an office procedure by a cosmetic surgeon. On postoperative day 2, the patient was referred to the emergency department of our hospital because of pain. On admission, the patient was in toxic shock. She required intensive medical treatment for about 1 month, along with psychiatric help to adapt after the illness. Although toxic shock syndrome is a rare postoperative complication, every plastic surgeon should be acquainted with it. A combination of early recognition, diagnosis, and aggressive supportive therapy is the only successful treatment.

Adult↗