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PubMed2006

Gastric motor function and emptying in the right decubitus and seated body position as assessed by magnetic resonance imaging.

PURPOSE: To determine the effect of the right decubitus lying body position (RP) on relevant parameters of human gastric motor function in healthy volunteers. MATERIALS AND METHODS: Postprandial gastric function after ingestion of a solid/liquid meal (150 g/150 mL) was assessed over 90 minutes in volunteers in the RP and seated position (SP). Ten healthy volunteers were imaged using two MRI systems that differed in architecture and field strength. Stomach and intragastric air volume, intragastric meal distribution, gastric emptying, and gastric peristalsis were compared between the RP and SP. RESULTS: Body position did not affect gastric relaxation (RP, 372 mL vs. SP, 384 mL) and initial gastric volumes (stomach: RP, 458 mL vs. SP, 462 mL; meal: RP, 377 mL vs. SP, 399 mL; intragastric air: RP, 110 mL vs. SP, 98 mL). Postprandial stomach volume and gastric activity (RP and SP, 3.1 minute(-1)) were also similar. Meal emptying showed different characteristics, resulting in a significant but small difference in meal volume of -43 mL at t = 90 minutes (P < 0.05). CONCLUSION: Gastric MRI in RP is feasible for clinical research assessing gastric motor function. The subtle difference in meal emptying may be induced by posture-dependent vagal activity. This study confirms that MRI is a highly sensitive imaging technique for assessing gastrointestinal function in humans.

Adult↗
PubMed1980

The carbon dioxide surgical laser in neurological surgery, decubitus ulcers, and burns.

Laser surgery has become an established part of general and specialty surgical techniques. Of all the lasers available today, the carbon dioxide laser possesses the physical and biological-surgical properties of most value to the surgeon. The CO2 laser puts out a spatially and temporally coherent beam of high intensity, infrared radiation at 10.6 micrometers, a wavelength nearly 100% absorbed by tissue. Its action is dependent on heat, and it has the ability to vaporize, cut, and excise all tissue hemostatically, sterilizing as it proceeds. Experimental work in animal patients and man has laid the groundwork for clinical application. The CO2 laser's value as a surgical tool has been clearly shown in the treatment of cancers and other neoplasms in brain, thoracic, and abdominal viscera; larynx; pharynx; nasal and sinus cavities; rectum; vulva, vagina; and uterus, for palliation and, at times, cure. It has been found of undoubted value in the debridement of decubitus ulcers and burns and has great potential for orthopedic surgery and breast surgery. The surgical laser is safe for patient and operating personnel, relatively simple to use, rapid in its action and without untoward impact on tissue locally or at a distance.

Animals↗
PubMed1990

Estimation of pulmonary hypertension by perfusion lung scintigraphy: gravitational effect of postural changes between the lateral decubitus positions.

To estimate pulmonary hypertension in patients with various heart diseases, we devised a new method using perfusion lung scintigraphy with technetium-99m-labelled macroaggregated albumin. In this method, changes in the distribution of pulmonary perfusion caused by gravitational effects, namely, changes in the total count ratios of the right lung against the left lung between right and left lateral decubitus positions (rt/lt), were assessed in 62 patients and in 10 normal subjects. The rt/lt ratios were calculated as indices of the above changes. They correlated significantly with mean pulmonary arterial pressure (mPAP) (gamma = -0.62, P less than 0.001), pulmonary capillary wedge pressure (gamma = -0.63, P less than 0.001) and pulmonary arteriolar resistance (gamma = 0.50, P less than 0.001) in all subjects. In 17 patients with valvular heart diseases, the ratio correlated significantly with mPAP (gamma = -0.84, P less than 0.001). In 10 patients with various heart diseases, the U/S ratio, i.e. the index of changes in the count ratios of the upper field against the lower field for the right lung following postural change from the upright to the supine position, was also obtained as well as the rt/lt ratio. The latter evidenced a better correlation with mPAP (gamma = -0.90, P less than 0.001) than the former (gamma = -0.64, P less than 0.05). We conclude that this method is valuable as a noninvasive approach for the estimation of pulmonary hypertension.

Female↗
PubMed1994

Is hypoxic pulmonary vasoconstriction important during single lung ventilation in the lateral decubitus position?

Hypoxic pulmonary vasoconstriction (HPV) has not been demonstrated in human single lung anaesthesia in the lateral decubitus position (LDP). The purpose of this study was to determine whether (1) HPV occurs in the non-dependent, non-ventilated lung, and (2) if the infusion of sodium nitroprusside (SNP) inhibits HPV. During intravenous anaesthesia the tracheas of seven patients were intubated with double lumen endotracheal tubes. Standard monitors plus radial and pulmonary arterial catheters were placed. Patients were positioned in the LDP and haemodynamic and gas exchange data were recorded for each of three stages; I: two-lung ventilation, II: single, dependent lung ventilation (1 LV) and III: 1LV with infusion of SNP. In stage II the PaO2 decreased from 531 +/- 42 mmHg to 285 +/- 42 mmHg (P < 0.05) and Qs/Qt increased from 12.3 +/- 2.7 to 29.0 +/- 6.3% (P < 0.05). With SNP infusion there was a 30% increase in cardiac index (CI) (P < 0.05). The SNP infusion was not associated with changes in Qs/Qt or PaO2. This model demonstrates changes in Qs/Qt and PaO2 associated with single-lung ventilation in ASA I and II patients in the LDP but we were unable to demonstrate inhibition of HPV by SNP.

Anesthesia, Intravenous↗
PubMed2001

[Severe decubitus ulcer: risk factors and nursing requirements in the terminal life phase].

UNLABELLED: We present an analysis of the risk factors, the origin and the nursing and medical practice of 140 deaths with high-grade pressure sores which had been detected by post-mortem examination before cremation. METHODS: All available nursing and medical records from nursing homes and hospitals were screened; in addition, relatives and head nurses were interviewed. The data sources were screened for individual risk factors, information about pressure sore prevention and treatment activities by nursing staff and general practitioners. Moreover, the utilization of pressure relieving devices for patients before and after development of the final decubitus was analyzed. RESULTS: More than 50% of the pressure ulcers had been incident in nursing homes. The mean duration of the disease was 307 days (median duration 123 days); the maximum duration ranged up to about 6 years. As far as it could be judged from the nursing records, there was a shortfall of nursing quality in terms of prevention efforts which appeared to be frequently inadequate in relation to the risk profile of the residents. Standardized pressure sore record files were missing in most of the cases. General practitioners were not involved in the treatment in 20% of all cases; some of them prescribed an obsolete wound management. In this study 52% of the patients had been classified into the maximum grade within the three-stage German nursing care insurance scheme. In cases of private care information about utilization of financial support and of professional help should be enforced. DISCUSSION: Being an indicator of nursing quality, shortfalls of prevention measures should be combatted by a broad pattern of quality management strategies which could be adapted from the clinical sector.

Adult↗
PubMed1976

Sepsis associated with decubitus ulcers.

Among 21 patients with sepsis attributed solely to decubitus ulcers, bacteremia was documented in 16 (76 per cent)9 Bacteremia involved obligate anaerobes in eight patients (50 per cent) and was polymicrobial in eight patients (50 per cent). Twelve of 17 patients who received antibiotics had persistent bacteremia; in five patients, bacteremia was terminated only after surgical debridement. Ten of these 21 patients died, eight despite appropirate antibiotics. Among 14 patients who underwent surgical debridement, only four patients died. Surgical debridement and antibiotics effective against aerobic as well as anaerobic bacteria are both important in the treatment of this serious complication.

Adult↗
PubMed1995

Pressure (decubitus) ulcer: variation in histopathology--a light and electron microscope study.

The histopathology of pressure (decubitus) ulcers from 20 patients was examined by light and electron microscopy. Surgical biopsy specimens from the ulcer edge, ulcer margin, and adjacent normal, nonulcerated skin showed four general types of ulcer histopathology. Morphological features common to all ulcer groups were a dense fibrin matrix, occluded blood vessels, numerous inflammatory cells, and a range of cellular viability from functionally normal appearing cells to cells in all stages of necrosis. These data present structural reference points for comparing pressure ulcer pathology and evaluating the effects of growth factors on wound healing.

Humans↗
PubMed1991

Breast irradiation in the lateral decubitus position: technique of the Institut Curie.

Breast irradiation in the lateral decubitus (LD) position is a technique used at the Institut Curie for more than 30 years in the breast-conserving management of patient with breast cancer. This technique is described in detail in this article. The patient's position allows the breast to flatten over a support, hence providing a rather homogeneous thickness throughout the treated volume. Dose at mid-thickness on the beam axis can be easily determined from entrance and exit dose measurements. Disadvantages and advantages of the LD technique are discussed. We presently recommend this technique for patients with large breasts (more than 6 cm thickness in LD position).

Breast Neoplasms↗
PubMed1990

Lateral-paramedian infratentorial approach in lateral decubitus for pineal tumours.

All classical operative approaches for pineal tumours have important disadvantages. A lateral-paramedian infratentorial approach in lateral decubitus is proposed. It has the advantage that one can reach the pineal region by way of a shorter distance and over a lower situated part of the upper cerebellar surface. Lifting of the transverse sinus becomes unnecessary. The venous vessels can be saved and there is no risk for air embolism or pneumocephalus.

Brain Neoplasms↗
PubMedDate not supplied

Mechanisms of decubitus ulcer formation--an hypothesis.

Understanding of the etiology of decubitus ulcer formation is fragmentary and the existing literature contains much experimental data that are inconsistent with the idea that pressure sore formation is due extensively to depriving a tissue region of blood. In fact, there is substantial data that illustrate that tissue can remain viable for very extended lengths of time, up to 13 hours, when subjected to externally applied pressures that collapse the blood microvasculature in a region. Based on these observations and on studies done in this laboratory on lymph propulsion and pressure sore prevention, an hypothesis has been formulated that is consistent with the published data and with clinical observations. The hypothesis states that a major contributing factor to pressure sores is the tissue necrosis that is caused by the accumulation of anaerobic metabolic waste products due to occlusion of the lymph vessels.

Animals↗
PubMed2005

Decubitus direct current treatment (DDCT) of pressure ulcers: results of a randomized double-blinded placebo controlled study.

Electrostimulation for the treatment of pressure sores remains problematic and controversial. We studied the decubitus direct current treatment (DDCT) electrostimulation treatment of pressure sores stage 3 degree, with respect to rates of ulcer closure and wound area reduction. This was a multicenter, double-blind, randomized, placebo-controlled study involving 11 departments of geriatric and rehabilitation medicine including 63 patients. We compared a placebo treated group (PG) with an active treatment group (TG). Treatment lasted for 8 consecutive weeks, followed by a 12-week-period of follow-up. At day 57 (end of treatment) and at day 147 (end of follow-up), there was no difference between the groups with regards to rates of complete closure of ulcers (p=0.28 and 0.39, respectively), as well as for the mean time needed to achieve complete wound closure (p=0.16). Absolute ulcer area reduction and speed rate of wound area reduction (reflected by change from baseline ulcer area, percentage) were better in participants allocated in the treatment group only until day 45 (standardized estimate for trend of healing speed -0.44 and -0.14 for TG and PG, respectively). Afterwards, there were no differences between the two groups. A logistic regression analysis favored complete healing in TG, compared with PG (odds ratio 1.6, CI 0.4-4.73). Analysis of per protocol patients revealed that time needed for wound closure was 52% longer in PG (p=0.03, compared with TG). The results suggest that DDCT treatment for pressure ulcers grade 3 degree, in addition to the conservative wound care, may be useful in accelerating the healing process during the first period of care.

Aged↗
PubMed2005

Accelerated wound healing through the incorporation of basic fibroblast growth factor-impregnated gelatin microspheres into artificial dermis using a pressure-induced decubitus ulcer model in genetically diabetic mice.

The objective of this study was to evaluate the effect of incorporating basic fibroblast growth factor (bFGF)-impregnated gelatin microspheres into an artificial dermis on impaired wound healing using a pressure-induced decubitus ulcer model in genetically diabetic mice. Daily 10 h prolonged pressure at 500 g/cm2 was loaded for 2 consecutive days over the femoral trochanter tertius of mice to produce ischemic necrosis. Five days after completion of the pressure load, the necrotic tissues were resected. Then, an artificial dermis incorporating bFGF-impregnated gelatin microspheres or bFGF in solution was implanted into the wound (n = 5). Mice were sacrificed at 5, 7, and 10 days after implantation, and a full-thickness biopsy was taken and stained with hematoxylin and eosin for histological analysis. All experimental animals were infected because diabetic mice have little tolerance for infection. Seven days after implantation, the incorporation of bFGF into the artificial dermis reduced infection and accelerated fibroblast proliferation and capillary formation. However, the accelerated effects were more significant with the incorporation of bFGF-impregnated gelatin microspheres than with free bFGF. We conclude that the incorporation of bFGF-impregnated gelatin microspheres into an artificial dermis induced tissue regeneration in an artificial dermis in an impaired wound healing model.

Animals↗
PubMed2003

Hemipelvectomy for severe decubitus ulcers in patients with previous spinal cord injury.

BACKGROUND: Patients with spinal cord injury (SCI) frequently have pressure ulcers. Surgery is sometimes needed to close them. In rare cases, hemipelvectomy is warranted for extremely severe complications. METHODS: We conducted a retrospective study using national Department of Veterans Affairs (DVA) computer data sets to identify clinical features of SCI patients who underwent hemipelvectomy for life-threatening septic complications of decubitus ulcers. RESULTS: Among the approximately 4 million patients receiving care in the DVA system, more than 40,000 patients were treated on an inpatient basis for SCI during the search period (fiscal years 1989 to 1998). They represent approximately 20% of the total national patient pool. There were 56 patients who supposedly had undergone hemipelvectomy. Chart review eliminated cases that did not meet our inclusion criteria, resulting in 8 evaluable cases. All had complete SCI due to trauma and later developed severe pressure sores with pelvic osteomyelitis or life-threatening soft tissue infection. CONCLUSIONS: This series is the largest reported to date. The surgery involved significant blood loss (mean 2.6 L). Reoperations and complications were common. The mortality rate was 25%, but the survivors were all markedly improved by the surgery. Some of the complications appeared to be related more to the SCI than to the pelvic sepsis or surgery, suggesting that meticulous perioperative care may be valuable in reducing the complication rate in SCI patients undergoing this radical operation for very severe sequelae of pressure ulcers.

Adult↗
PubMed1983

The role of decubitus films in double-contrast barium enemas.

Five hundred barium enemas were reviewed to find the influence of the decubitus films on the radiologist's report. In two cases they demonstrated abnormalities that had not been seen on any other film. In 21 out of 43 cases they resolved a diagnostic problem that had arisen when viewing the other films. They were of greatest value in differentiating possible polyps from faecal residue in patients with imperfect bowel preparation.

Barium Sulfate↗
PubMedDate not supplied

[Lateralization as alternative to static prone decubitus in patients with ARDS].

UNLABELLED: According to Phillips, Continuous Lateral Rotation (CLR) or Kinetic Therapy (KT) together with the technological advances obtain some important benefits in mechanically ventilated patients. OBJECTIVE: Compare Static Prone Decubitus (PD) with DP in CRL. PATIENTS AND METHODS: We analyzed 2 groups with a total of 41 patients in the period of January 1998 to April 2003. The DP group (25 patients) remained static and the lateral group (16 patients) in CLR every 2 h. The groups had 56 +/- 16 vs 64 +/- 17 years, 77 +/- 20 vs 71 +/- 23 kg and 24% vs 31% of survival, respectively. RESULTS: We maintained the PD 37 +/- 30 vs 27 +/- 36 h for group 1 and 2. The response as Responders is 68% and 69%. pO2/FiO2 of supine pre-DP to supine post-DP is 79 +/- 21 to 146 +/- 68 versus 80 +/- 20 to 138 +/- 57 and pulmonary compliance 22 +/- 10 to 21 +/- 10 vs 31 +/- 10 to 32 +/- 9. Mean blood pressure of S to S was 87 +/- 16 to 85 +/- 15 vs 82 +/- 10 to 80 +/- 9, and mean Heart rate 108 +/- 21 to 95 +/- 24 vs 85 +/- 32 to 75 +/- 28. Complications by groups were: facial edema of 84% vs 63%, gastric retention 36% to 38%, vomiting/regurgitation 12% to 0%, epistaxis 8% to 31%. Pressure Sore (PS) Incidence decreased from 36% to 12%, together with seriousness. CONCLUSION: We consider that lateralization if PD is a technique comparable to static PD on the respiratory and hemodynamics level. CLR in PD may prevent some complications.

Case-Control Studies↗
PubMed1986

Perineal decubitus ulcer with urethro-cutaneous fistula without bilateral ischiectomy: case report.

Perineal decubitus ulcer with urethro-cutaneous fistula has previously been reported in paraplegics as a late complication following bilateral ischiectomy. This case report illustrates the occurrence of the problem in a male paraplegic without bilateral ischiectomy, and this has not been previously reported in the English literature. Successful reconstruction was accomplished with a full thickness skin graft tube and and gracilis muscle flap.

Adult↗
PubMed1998

Mechanisms of gastro-oesophageal reflux in the lateral decubitus positions.

Gastro-oesophageal reflux is more common in the right than in the left lateral position but the reasons why are not well understood. We have therefore studied the mechanisms underlying reflux in the lateral decubitus positions in patients with reflux disease. Fifteen patients with symptomatic reflux and excessive oesophageal acid exposure were studied (nine male, age 25-63 years). Each was intubated with a perfused manometric assembly, incorporating a Dent sleeve, and a pH probe. Following a 30-min basal period, a 400-kCal meal was infused into the stomach and patients were studied for 60 min in each lateral position. Following infusion of the meal, lower oesophageal sphincter (LOS) pressure fell and transient LOS relaxation (TLOSR) frequency increased. Acid reflux episodes were more common in the postprandial period (fasting 0 (0-6) h, first postprandial hour 1 (0-9) h, P = 0.0002, second postprandial hour 1 (0-22) h, P = 0.02) and occurred more than twice as often in the right lateral position (right 3 (0-22) h, left 0 (0-10) h, P = 0.01). However, TLOSRs, swallow-related relaxations and low basal LOS pressures were equally common in both lateral positions. In patients with reflux disease, postprandial reflux is twice as common in the right lateral position. This does not relate to differences in gastro-oesophageal junctional pressure, suggesting that other aspects of barrier function or differences in the intragastric distribution of chyme may be important.

Adult↗