Search PubMed⌕ Search

Biomedical subjects

Daniel B Carr

Publications and source records attributed to Daniel B Carr.

At least 55 records · Page 3Linked to original sources
PubMed2003

Women experience more pain and require more morphine than men to achieve a similar degree of analgesia.

UNLABELLED: Sex differences in pain perception and in response to opioids have been described, but the findings are inconsistent. We sought to determine the effect of sex on pain perception, morphine consumption, and morphine analgesia after surgery. We designed a prospective cohort study and included 423 women and 277 men who emerged from general anesthesia after surgical procedures and who reported pain intensity of >or=5 on the 0-10 numeric rating scale (NRS). We administered 2.5 mg of morphine IV every 10 min until the pain intensity was <or=4 of 10. Every 10 min, patients rated their pain on the NRS and indicated the degree of pain relief on a 5-point Likert scale. After adjustment for type of operation and age, we found that women had more intense pain and had larger morphine consumption than men. The difference in NRS pain intensity was 0.4 U (95% confidence interval, 0.1-0.6 U). Women required 0.03 mg/kg more morphine than men (95% confidence interval, 0.02-0.04 mg/kg). We conclude that women have more intense pain and require 30% more morphine to achieve a similar degree of analgesia compared with men. Clinicians should anticipate the differences in opioid requirement to avoid undertreatment of pain in women. IMPLICATIONS: The effect of sex on opioid response is not clear. To determine the effect of sex on morphine consumption and morphine analgesia, we designed a cohort study. We found that women had more intense pain and required 30% more morphine to achieve a similar degree of analgesia compared with men.

Abdomen↗
PubMed2003

Preoperative interscalene block for elective shoulder surgery: loss of benefit over early postoperative block after patient discharge to home.

UNLABELLED: We performed a randomized, prospective, parallel-group, open-label, multicenter trial to compare the effects of pre- versus postoperative interscalene block using levobupivacaine on postoperative pain and analgesic requirements. One-hundred-two outpatients scheduled for elective shoulder surgery were randomized to receive 30 mL of 0.5% levobupivacaine either preoperatively (PRE group) or postoperatively (POST group). Analgesic outcome measures during the postoperative period were: (a). time to first request for analgesic medication after surgery, (b). pain intensity using the visual analog scale at rest and during arm movement, and (c). total analgesic consumption of nonsteroidal antiinflammatory drugs and opioids. The time to first analgesic request did not differ between treatment groups. However, mean maximum pain intensity scores during the day of surgery were significantly less for the PRE group than the POST group, both at rest (P = 0.001) and after movement (P = 0.004). The mean opioid administered during surgery was lower in the PRE than the POST group (P < 0.001). Levobupivacaine was well tolerated in both treatment groups, and no adverse reactions were related to this local anesthetic. In conclusion, preoperative interscalene block with levobupivacaine provided superior pain control for the first 12 h after surgery, but this benefit was not maintained during the week after discharge because the subjects assumed control of their own pain relief as outpatients. IMPLICATIONS: Preoperative interscalene block with levobupivacaine provides safe and effective analgesia for same-day elective shoulder surgery, but the benefit of this one-time intervention does not persist.

Adolescent↗
PubMed2002

Direct antimicrobial properties of substance P.

The structural similarity between substance P (SP, Arg-Pro-Lys-Pro-Gln-Gln-Phe-Phe-Gly-Leu-Met-NH(2)) and Arg/Pro rich bactericidal peptides suggests a possible direct effect of SP on invasive microbes. We now present evidence that substance P possesses direct antimicrobial activity, highest against S. aureus. A substance P antagonist also possesses such activity but while less potent than substance P agonist S. aureus, is more potent than substance P against C. albicans. Our data also show that the endogenous peptides bradykinin and neurotensin, that also play role in modulation of the host-defense system in situ, have antimicrobial properties but are less potent than substance P.

Adjuvants, Immunologic↗
PubMed2002

The combination of low dose of naloxone and morphine in PCA does not decrease opioid requirements in the postoperative period.

The continuous infusion of low doses of naloxone has been reported to decrease postoperative opioid requirements and opioid side effects. However, there is no study that evaluates the effectiveness of the combination of a low dose of naloxone and morphine using patient-controlled analgesia (PCA). This prospective, randomized double-blind controlled study sought to determine if the combination of a low dose of naloxone and morphine in a PCA solution decreases postoperative opioid requirements and pain intensity. One hundred sixty-six patients (18-65 years old) undergoing operations of less than 3 h duration with an American Society of Anesthesiologist physical status I or II were randomized to receive PCA morphine 1 mg/cc plus normal saline or PCA morphine 1 mg/cc plus naloxone 6 microg/cc. Initial PCA settings were 0.5 cc per demand with a lockout time of 10 min. The numbers of 2.5 cc supplemental rescue doses and the cumulative dose of each solution were recorded in the first 24 h after the surgical procedure. Pain intensity and opioid side effects were evaluated every 10 min in the post-anesthesia care unit and every 4 h afterwards. Patient satisfaction was assessed at the end of the 24 h of observation. The morphine+naloxone group had more treatment failures (P=0.0001), higher opioid requirements (P=0.0097), greater pain intensity (P=0.04), less pain relief (P=0.004), and less satisfaction (P=0.01) than the morphine group. The incidence of side effects was similar in both groups (P=0.3). Contrary to previous reports, adding low doses of naloxone to a morphine PCA solution increases opioid requirements and pain.

Adult↗
PubMed2002

Chronic persistent pain after severe burns: a survey of 358 burn survivors.

OBJECTIVE: To determine the prevalence, characteristics, and effects of chronic persistent pain on burn survivors. DESIGN: Mail survey. SETTING: Respondents' homes. PATIENTS: All members of the Phoenix Society for Burn Survivors. INTERVENTIONS: None. OUTCOME MEASURES: Twenty-three questions on the prevalence of pain and its characteristics, including the short form of the McGill-Melzack Pain Questionnaire. RESULTS: Of 1,500 members who received the survey, 358 (24%) responded. Respondents had burns covering an average of 59% of their bodies. Time between the injury and the survey averaged 12 years. On the survey, 52% of respondents reported ongoing burn-related pain, and 46% were able to characterize their pain with one or more of 15 characteristics. Two-thirds (66%) reported that pain interfered with their rehabilitation, and 55% reported that pain interfered with their daily lives. Asked "what makes the pain worse now?," the most frequent reply (15%) was "the weather" (including "hot" or "cold"). Various physical activities (e.g., walking, bicycling) were also mentioned, along with nerve regrowth, contractures, remembering the accident, and depression. "Things that make your pain better now" included "nothing," a variety of over-the-counter analgesics, "rest,""exercise,""yoga,""acupuncture,""family and friends," and "God." In coping with their pain, most respondents found family the most helpful, although nurse(s) received almost as high a rating. CONCLUSIONS: Pain associated with burn trauma continues to be of considerable significance in the lives of burn victims long after the initial injury and hospitalization. Little research has been done on this population.

Journal Article↗
PubMed2002

An updated interdisciplinary clinical pathway for CRPS: report of an expert panel.

The goal of treatment in patients with complex regional pain syndrome (CRPS) is to improve function, relieve pain, and achieve remission. Current guidelines recommend interdisciplinary management, emphasizing 3 core treatment elements: pain management, rehabilitation, and psychological therapy. Although the best therapeutic regimen or the ideal progression through these modalities has not yet been established, increasing evidence suggests that some cases are refractory to conservative measures and require flexible application of the various treatments as well as earlier consideration of interventions such as spinal cord stimulation (SCS). While existing treatment guidelines have attempted to address the comprehensive management of CRPS, all fail to provide guidance for contingent management in response to a sudden change in the patient's medical status. This paper reviews the current pathophysiology as it is known, reviews the purported treatments, and provides a modified clinical pathway (guideline) that attempts to expand the scope of previous guidelines.

Journal Article↗
PubMed2002

Postoperative analgesia: economics, resource use, and patient satisfaction in an urban teaching hospital.

UNLABELLED: We sought to describe the economic and humanistic burden after total abdominal hysterectomy (TAH), total hip replacement (THR), or total knee replacement (TKR) surgery. Resource use and costs were estimated from the hospital perspective. The mean worst pain severity was 8.9, 8.1, and 7.6 on a 0- to 10-point scale after TAH, THR, and TKR, respectively. Postoperative pain was worst on postoperative day 1 after TAH or THR, and on postoperative day 2 after TKR. Analgesic medications relieved from 60% to nearly 78% of postoperative pain, but participants re- ported moderate-to-high levels of interference with general activity, walking ability, and sleep because of postoperative pain. Most costs were attributed to the hospital admission and operating room. The average length of hospitalization was 2.8 days after TAH, and 3.9 days after THR or TKR. This study provides insight into patients' experience with pain after common surgeries, perioperative costs, and medical resource use. IMPLICATIONS: Despite impressive relief with analgesics, postoperative pain interferes with patients' ability to sleep, walk, and participate in other activities. Medications used postoperatively account for a small portion of total costs. Satisfaction ratings alone are a poor indicator of pain control. These data can be used to help improve pain relief.

Adult↗
PubMed2002

Current approaches to analgesic drug delivery for chronic pain.

A growing number of governmental and professional guidelines internationally have supported aggressive treatment of acute (e.g., postsurgical), cancer, and noncancer pain. The basis for such support is awareness that aggressive control of acute pain reduces postoperative complications and speeds recovery. Chronic noncancer pain (e.g., back pain, headache...) exacts enormous financial costs in each developed nation. Patients' quality of life and possibly even duration of survival as well as associated caregiver burden are enhanced by adequate pain control in patients with chronic pain due to cancer and noncancer causes. Because humanitarian benefits of pain control are supplemented by economic savings, a variety of techniques have been introduced to improve the temporal or spatial profiles of analgesic drug delivery. This brief survey describes the physiological basis for considering pain itself as a disease, the principal drugs and delivery approaches for treatment of severe pain, and the future of "combination analgesic chemotherapy".

Analgesics, Opioid↗
PubMed2002

Opiophobia as a barrier to the treatment of pain.

An international panel of pain specialists including physicians and health policy scholars met to discuss the impact of fear of opioids on the clinical use of these strong analgesics. Recognizing potential risk from opioids, the panel members concluded that irrational fear of the drugs often impedes their appropriate use. The need for education among clinicians was recognized and the panel concluded that while progress has been made, much remains to be done to correct unfounded fears and misconceptions that impede provision of opioid analgesia when it is indicated.

Analgesics, Opioid↗
PubMed1991

Pain during burn dressing change in children: relationship to burn area, depth and analgesic regimens.

To determine the level of pain that acutely burned children experience, we obtained pain scores before, during and after burn dressing change (BDC). Pain scores were higher during the BDC, consistent with severe pain during this procedure. A positive correlation between pain scores and the body surface area (BSA) burned suggests that pain increases with the size of the burn. Contrary to widely held beliefs, comparison of mean pain scores and the percent of 3rd degree burn revealed that the larger the area of full-thickness injury, the greater the pain. Regardless of wide variations in patient characteristics, fixed doses of oral narcotics were usually prescribed for pain. Patients with BSA greater than 70% experienced severe pain during BDC despite the type, dose or route of opioids. These findings suggest the need for (a) education to correct the myth that 'third-degree burns don't hurt'; (b) revision of analgesic prescribing patterns in the burned child; and (c) research to determine the mechanisms (e.g., tolerance or deafferentation) underlying the opioid-resistant nature of pain after large burns.

Acetaminophen↗
PubMed1988

Itching after epidural and spinal opiates.

When opiates are administered by the epidural and spinal routes, itching occurs as a side effect. We reviewed 52 reports in the literature of the use of epidural and spinal opiates to assess the incidence of itching and found an overall incidence of 8.5% in patients receiving epidural opiates, and 46% in patients receiving spinal opiates. The symptom is a recognised, though rare, side effect of systemically administered opiates, and in the case of systemic administration the itching is generalised. In the case of epidural and spinal administration, the itching may be generalised. But often a segmental distribution is demonstrable, centred on the level of injection, or the itching is localised to a particular area such as the nose and face. It is likely therefore, in the latter case, that there is an effect upon the spinal cord itself. Although occasionally spinal opiate-induced itching is extremely troublesome and lessens the value of spinal opiate pain relief, in the majority of cases, the itching is not severe and is treatable with naloxone. However, the frequent occurrence of the symptom and the likelihood of a spinal cord mechanism do provide valuable information about opioid actions, and benefit may be derived from better understanding the phenomenon. This paper states a hypothesis to explain spinal opiate-induced itch and explores the possible mechanisms of the effect.

Anesthesia, Epidural↗
PubMed1985

The assessment of pain and plasma beta-endorphin immunoactivity in burned children.

The need for better analgesia during burn dressing changes (BDCs) in acutely burned children led us to assess pain during BDC with a large 0-10 thermometer-like scale which was well accepted and appeared to reflect the varying degrees of pain that patients experienced. Pain scores were obtained at least once each minute throughout 33 BDCs in 15 patients of 8-17 years. Plasma levels of beta-endorphin immunoactivity (iB-EP) were measured at 5 intervals before and after BDC; mean values (+/- S.E.M.) ranged from 30.5 +/- 4.63 pg/ml (before BDC and analgesic) to 19.2 +/- 3.02 pg/ml (immediately following BDC). The mean pain score (MPS) for each BDC was inversely related to the iB-EP levels of that day (P less than 0.001 with 4 of the 5 iB-EP determinations). The MPS varied directly with the extent of burn injury and inversely with weight; the 2 variables together predicted MPS as well as the iB-EP alone (r2 = 43 and 36% respectively).

Administration, Topical↗
PubMedDate not supplied

The impact of technology on the analgesic gap and quality of acute pain management.

National surveys continue to document the undertreatment of acute postoperative pain, despite the availability of evidence-based, clinical practice guidelines and the Joint Commission on Accreditation of Healthcare Organizations standards. This article surveys factors that contribute to persistent gaps during the acute pain management process, including deficiencies in providing continuous analgesia, disparities in access to medical care, the acute pain medicine culture itself, a lack of adequate pain assessment, health care provider biases, and limited health care resources. The role of technology in increasing patients' control over their own pain management and narrowing these gaps is discussed. Patient-controlled analgesia delivery systems are an example of such technology, and they play a key role in improving the quality of acute pain management and increasing the patient's involvement in this process. However, the use of these systems may be limited because of the amount of health care resources necessary for their administration and limitations in payment for professional services. Therefore, there exists a need for additional technologies that will simplify the pain management process and reduce the amount of health care resources necessary to provide patients with quality acute pain management.

Acute Disease↗