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Advances in Therapy Nov 2019The subcutaneous administration route is widely used to administer different types of drugs given its high bioavailability and rapid onset of action. However, the... (Review)
Review
The subcutaneous administration route is widely used to administer different types of drugs given its high bioavailability and rapid onset of action. However, the sensation of pain at the injection site might reduce patient adherence. Apart from a direct effect of the drug itself, several factors can influence the sensation of pain: needle features, injection site, volume injected, injection speed, osmolality, viscosity and pH of formulation, as well as the kind of excipients employed, including buffers and preservatives. Short and thin needles, conveniently lubricated and with sharp tips, are generally used to minimize pain, although the anatomic injection site (abdomen versus thigh) also affects the sensation of pain. Large subcutaneous injection volumes are associated with pain. In this sense, the maximum volume generally accepted is around 1.5 ml, although volumes of up to 3 ml are well tolerated when injected in the abdomen. Injected volumes of up to 0.5-0.8 ml are not expected to increase substantially the pain produced by the needle insertion. Ideally, injectable products should be formulated as isotonic solutions (osmolality of about 300 mOsm/kg) and no more than 600 mOs/kg have to be used in order to prevent pain. A pH close to the physiological one is recommended to minimize pain, irritation, and tissue damage. Buffers are frequently added to parenteral formulations to optimize solubility and stability by adjusting the pH; however, their strength should be kept as low as possible to avoid pain upon injection. The data available recommend the concentration of phosphate buffer be limited to 10 mM and that the concentration of citrate buffer should be lower than 7.3 mM to avoid an increased sensation of pain. In the case of preservatives, which are required in multiple-dose preparations, m-cresol seems to be more painful than benzyl alcohol and phenol.Funding: Sandoz SA.
Topics: Humans; Injection Site Reaction; Injections, Subcutaneous; Needles; Osmolar Concentration; Pain; Patient Compliance; Pharmaceutical Preparations; Thigh
PubMed: 31587143
DOI: 10.1007/s12325-019-01101-6 -
Drug Delivery and Translational Research Feb 2022
Topics: Drug Delivery Systems; Microinjections; Needles
PubMed: 34932196
DOI: 10.1007/s13346-021-01100-7 -
Journal of Ayub Medical College,... 2019Acne effects 80-90% of teenage population all around the world. Resulting scars can lead to facial disfigurement and psychological issues in affected population. To...
BACKGROUND
Acne effects 80-90% of teenage population all around the world. Resulting scars can lead to facial disfigurement and psychological issues in affected population. To counter this problem many treatment options have been tried including resurfacing lasers, dermabrasion, peeling, fillers, platelet rich plasma therapy etc. All have shown variable results. Among these modalities, micro needling is showing promising results in treatment of acne scars due to collagen induction. This study was conducted to assess efficacy and safety of micro-needling on acne scars.
METHODS
In this cross-sectional study a total of 50 patients (female 35, male 15) underwent treatment for post acne scarring, 4 sessions of micro-needling were done under local anaesthesia 3 weeks apart over the span of 2 months. Initial and follow up qualitative assessment was done. Photographs were taken of each patient on their subsequent visit, they were analysed and compared for final results. Grading was done by using Goodman Baron scale.
RESULTS
70% (35) were females and 30% (15) were males with mean age of 27.31±4.41 ranging from 19-35 years. After the treatment of scars, 73% (08) of Grade 4 scars have showed improvement by 2 grades, remaining 27% (03) showed improvement to Grade 3. In 20 patients with Grade 3 scars, 30% (06) showed improvement by 1 grade. Remaining 70% (14) improved by 2 grades. All patients with Grade 2 scar downgraded to grade 1 after treatment. Chi-square test was used to assess pre-treatment and post treatment grading improvement among subjects and was statistically significant. (X2=30.010 p=000)..
CONCLUSIONS
Micro needling is an effective tool for aesthetic improvement of post acne scarring.
Topics: Acne Vulgaris; Adult; Cicatrix; Cosmetic Techniques; Cross-Sectional Studies; Female; Humans; Male; Needles; Young Adult
PubMed: 31535501
DOI: No ID Found -
JAMA Dermatology Feb 2021Soft-tissue augmentation with skin fillers can be delivered with needles or microcannulas, but unwanted vascular occlusions are possible. (Comparative Study)
Comparative Study
IMPORTANCE
Soft-tissue augmentation with skin fillers can be delivered with needles or microcannulas, but unwanted vascular occlusions are possible.
OBJECTIVE
To determine whether filler-associated vascular occlusion events of the face occur more often with injections performed with needles than with microcannulas.
DESIGN, SETTING, AND PARTICIPANTS
This retrospective cohort study included a random sample of board-certified dermatologists deemed eligible based on membership in relevant professional societies and attendance at relevant national professional meetings. Participants completed detailed forms in which they could enter deidentified data and volume statistics pertaining to patients undergoing filler procedures in their practices. Data were collected from August 2018 to August 2019.
EXPOSURES
Injectable fillers approved by the US Food and Drug Administration delivered via needles or microcannulas.
MAIN OUTCOMES AND MEASURES
The primary outcome measure was intravascular occlusion. Occlusion events were graded by severity (no sequelae, scar, and ocular injury or blindness).
RESULTS
A total of 370 dermatologists (mean [SD] years in practice, 22.3 [11.1] years) participated and reported 1.7 million syringes injected. The risk of occlusion with any particular filler type using needle or cannula never exceeded 1 per 5000 syringes injected. Overall, 1 occlusion per 6410 per 1-mL syringe injections was observed with needles and 1 per 40 882 with cannulas (P < .001). Of the 370 participants, 106 (28.6%) reported at least 1 occlusion. Multivariate analysis found that injections with cannula had 77.1% lower odds of occlusion compared with needle injections. Participants injecting fillers for more than 5 years had 70.7% lower odds of occlusion than those who were less experienced. For each additional injection per week, the odds of occlusion decreased by 1%, and 85% of occlusions had no long-term sequelae. Nasolabial folds and lips were most likely to be occluded, with mean severity level of occlusions highest at the glabella.
CONCLUSIONS AND RELEVANCE
In this cohort study, filler injections with either needles or cannulas were associated with a very low risk of intravascular occlusion events. Moreover, the vast majority of such events were minor and resolved without scar or other injury. Injections with microcannulas were less often associated with occlusion events than injections with needles. Occlusion risk per syringe appeared decreased after the first few years of clinical practice and was also lower among those who more frequently inject fillers. Whether a needle or cannula is most appropriate for injection may depend on patient factors, anatomic site, and the type of defect being treated.
Topics: Cannula; Cohort Studies; Cosmetic Techniques; Dermal Fillers; Dermatologists; Face; Humans; Injections; Needles; Retrospective Studies; Time Factors; Vascular Diseases
PubMed: 33377939
DOI: 10.1001/jamadermatol.2020.5102 -
Anaesthesia Aug 2021Post-dural puncture headache is one of the most undesirable complications of spinal anaesthesia. Previous pairwise meta-analyses have either compared groups of needles... (Meta-Analysis)
Meta-Analysis
Post-dural puncture headache is one of the most undesirable complications of spinal anaesthesia. Previous pairwise meta-analyses have either compared groups of needles or ranked individual needles based on the pooled incidence of post-dural puncture headache. These analyses have suggested both the gauge and needle tip design as risk-factors, but failed to provide an unbiased comparison of individual needles. This network meta-analysis compared the odds of post-dural puncture headache with needles of varying gauge and tip design. We searched randomised controlled trials in medical databases. The primary outcome measure of the network meta-analysis was the incidence of post-dural puncture headache. Secondary outcomes were procedural failure, backache and non-specific headache. Overall, we compared 11 different needles in 61 randomised controlled trials including a total of 14,961 participants. The probability of post-dural puncture headache and procedural failure was lowest with 26-G atraumatic needles. The 29-G cutting needle was more likely than three atraumatic needles to have the lowest odds of post-dural puncture headache, although with increased risk of procedural failure. The probability rankings were: 26 atraumatic > 27 atraumatic > 29 cutting > 24 atraumatic > 22 atraumatic > 25 atraumatic > 23 cutting > 22 cutting > 25 cutting > 27 cutting = 26 cutting for post-dural puncture headache; and 26 atraumatic > 25 cutting > 22 cutting > 24 atraumatic > 22 atraumatic > 25 atraumatic > 26 cutting > 29 cutting > 27 atraumatic = 27 cutting for procedural success. Meta-regression by type of surgical population (obstetric/non-obstetric) and participant position (sitting/lateral) did not alter these rank orders. This analysis provides an unbiased comparison of individual needles that does not support the use of simple rules when selecting the optimal needle. The 26-G atraumatic needle is most likely to enable successful insertion while avoiding post-dural puncture headache but, where this is not available, our probability rankings can help clinicians select the best of available options.
Topics: Anesthesia, Spinal; Humans; Needles; Post-Dural Puncture Headache
PubMed: 33332606
DOI: 10.1111/anae.15320 -
International Journal of Molecular... Nov 2018Despite successful use, needle-based immunizations have several issues such as the risk of injuries and infections from the reuse of needles and syringes and the low... (Review)
Review
Despite successful use, needle-based immunizations have several issues such as the risk of injuries and infections from the reuse of needles and syringes and the low patient compliance due to pain and fear of needles during immunization. In contrast, needle-free immunizations have several advantages including ease of administration, high level of patient compliance and the possibility of mass vaccination. Thus, there is an increasing interest on developing effective needle-free immunizations via cutaneous and mucosal approaches. Here, we discuss several methods of needle-free immunizations and provide insights into promising use of chitosan systems for successful immunization.
Topics: Animals; Chitosan; Humans; Immunity; Immunization; Needles; Skin
PubMed: 30463211
DOI: 10.3390/ijms19113639 -
Medicina (Kaunas, Lithuania) Feb 2022: The objective of our clinical trial was to determine the effectiveness of the deep dry needling technique (DDN) (neuromuscular deprogramming) as a first step in the... (Randomized Controlled Trial)
Randomized Controlled Trial
: The objective of our clinical trial was to determine the effectiveness of the deep dry needling technique (DDN) (neuromuscular deprogramming) as a first step in the treatment of temporomandibular disorders. : The double-blind randomized clinical trial comprised 36 patients meeting the inclusion criteria who had signed the corresponding informed consent form. The participants were randomly distributed into two groups, the Experimental group (Group E) and the Control group (Group C). Group E received bilateral DDN on the masseter muscle, while Group C received a simulation of the technique (PN). All the participants were evaluated three times: pre-needling, 10 min post-needling, and through a follow-up evaluation after 15 days. These evaluations included, among other tests: pain evaluation using the Visual Analog Scale (VAS) and bilateral muscle palpation with a pressure algometer; evaluation of the opening pattern and range of the mouth, articular sounds and dental occlusion using T-scans; and electromyography, which was used to evaluate the muscle tone of the masseter muscles, in order to control changes in mandibular position. : Digital control of occlusion using Tec-Scan (digital occlusion analysis) showed a significant reduction both in the time of posterior disclusion and in the time needed to reach maximum force in an MI position after needling the muscle, which demonstrated that there were variations in the static position and the trajectory of the jaw. The symmetry of the arch while opening and closing the mouth was recovered in a centric relation, with an increase in the opening range of the mouth after the procedure. : facial pain is significantly reduced and is accompanied by a notable reduction in muscle activity after needling its trigger points.
Topics: Dry Needling; Humans; Myofascial Pain Syndromes; Needles; Temporomandibular Joint Disorders; Trigger Points
PubMed: 35208580
DOI: 10.3390/medicina58020256 -
Anesthesiology Feb 2019
Topics: Needles; Nerve Block
PubMed: 30688791
DOI: 10.1097/ALN.0000000000002540 -
Skeletal Radiology Nov 2022Complications in musculoskeletal interventions are rare and where they do occur tend to be minor, and often short-lived or self-limiting. Nonetheless, the potential for... (Review)
Review
Complications in musculoskeletal interventions are rare and where they do occur tend to be minor, and often short-lived or self-limiting. Nonetheless, the potential for significant complications exists, and a thorough understanding of both the mechanisms which contribute and the manner in which they may clinically present is of critical importance for all musculoskeletal radiologists involved in performing procedures, both to mitigate against the occurrence of complications and to aid rapid recognition. The purpose of this review is to analyse the relevant literature to establish the frequency with which complications occur following musculoskeletal intervention. Furthermore, we highlight some of the more commonly discussed and feared complications in musculoskeletal intervention, such as the risk of infection, potential deleterious articular consequences including accelerated joint destruction and the poorly understood and often underestimated systemic effects of locally injected corticosteroids. We also consider both extremely rare but emergent scenarios such as anaphylactic reactions to medications, and much more common but less significant complications such as post-procedural pain. We suggest that meticulous attention to detail including strict adherence to aseptic technique and precise needle placement may reduce the frequency with which complications occur.
Topics: Adrenal Cortex Hormones; Humans; Injections; Needles
PubMed: 35622087
DOI: 10.1007/s00256-022-04076-8 -
Molecules (Basel, Switzerland) Sep 2021A microneedle (MN) is a painless and minimally invasive drug delivery device initially developed in 1976. As microneedle technology evolves, microneedles with different... (Review)
Review
A microneedle (MN) is a painless and minimally invasive drug delivery device initially developed in 1976. As microneedle technology evolves, microneedles with different shapes (cone and pyramid) and forms (solid, drug-coated, hollow, dissolvable and hydrogel-based microneedles) have been developed. The main objective of this review is the applications of microneedles in biomedical areas. Firstly, the classifications and manufacturing of microneedle are briefly introduced so that we can learn the advantages and fabrications of different MNs. Secondly, research of microneedles in biomedical therapy such as drug delivery systems, diagnoses of disease, as well as wound repair and cancer therapy are overviewed. Finally, the safety and the vision of the future of MNs are discussed.
Topics: Animals; Drug Delivery Systems; Humans; Microinjections; Needles; Pharmaceutical Preparations
PubMed: 34641460
DOI: 10.3390/molecules26195912